US20050271531A1 - Oral care device - Google Patents

Abstract

Oral care devices are provided that include a pumping assembly for dispensing a fluid, e.g., a dentifrice, from the oral care device.

Description

TECHNICAL FIELD
• This invention relates to oral care systems and methods of their use.
BACKGROUND
• Conventional toothbrushes, having tufts of bristles mounted on a head, are generally effective at removing plaque from the flat surfaces of teeth and the areas between teeth and along the gumline that can be accessed by the bristles. Typically, a consumer manually squeezes a globule of paste from a tube onto the bristles of the conventional brush prior to placing the brush in their mouth. After paste is deposited on the bristles, the brush is placed in their mouth and brushing commences. As a further development on conventional toothbrushes, U.S. Ser. No. 2002/0108193 proposes a sonic power toothbrush that is capable of dispensing additives at the head of the brush. The head can vibrate relative to the body of the brush due to sonic frequency vibrations that are transmitted to the brush head.
SUMMARY
• In one aspect, the invention features an oral care device that includes (a) an elongated housing including, at a distal portion of the housing, a head dimensioned to fit within a user's mouth; (b) a fluid conduit defining at least a portion of a fluid passageway in the housing, the fluid conduit having a compressible region disposed in the housing; and (c) a motorized pumping assembly configured to compress the fluid conduit in the compressible region progressively along at least a portion of the length of the fluid conduit to draw fluid into the compressible region and to transfer fluid out of the compressible region along the fluid passageway toward an outlet at the distal portion of the housing. The compressible region of the fluid conduit defines a path that is not semi-circular. Preferably the path is also not generally circular. In some implementations, the path defined by the compressible region is substantially straight, i.e., it has a radius of curvature greater than half the diameter of the housing in cross-section. The radius of curvature may in some cases be greater than 2 inches. In other implementations, the path defined by the compressible region may include one or more localized arcuate areas, but in such implementations the path will also include generally linear areas. The geometry of the compressible region allows the pumping assembly to have a relatively small profile, so that the pumping assembly fits within the elongated housing without the diameter of the housing becoming unwieldy. The geometry of the compressible region also facilitates removal of the fluid conduit from the housing, which is advantageous for reasons which will be discussed below.
• Some implementations include one or more of the following features. The pumping assembly may be configured to compress the conduit progressively with a series of multiple discrete compression events. The pumping assembly further comprises a rotatable shaft that includes a raised spiral, which may be continuous or discontinuous. For example, the spiral may include a discontinuous arrangement of protrusions extending outwardly from a surface of the rotatable shaft. The spiral may be configured to compress the conduit in the compressible region progressively along at least a portion of the length of the conduit as the shaft rotates. The pumping assembly may further include a compression element positioned between the shaft and the conduit such that the compression element is displaced by the shaft to compress the conduit in the compressible region when the shaft is rotated. The compression element may be capable of being displaced by the shaft when the shaft is rotated to multiple angular positions. The compression element may be configured to be displaced in a direction substantially transverse to the fluid path. For example, the compression element may be displaced linearly when the shaft is at a selected angular position. Alternatively, the compression element may be displaced in a rotational or bending motion, or by buckling the compression element.
• The oral device may include multiple compression elements positioned between the shaft and the conduit such that the compression elements are capable of being displaced by the shaft when the shaft is rotated, which may be arranged in one or more linear array(s).
• The oral care device may include an electric motor configured to rotate the rotatable shaft, e.g., at a selected rate or frequency in response to a signal from a controller located within the housing or at differing selected rates or frequencies. The controller may be programmed to increase or decrease the rate or frequency at which the motor rotates the rotatable shaft, e.g., in response to input from a user.
• The long axis of the fluid conduit may be substantially parallel to or coaxial with the long axis of the housing. The oral care device may further include a fluid reservoir located within the housing that is capable of communication with the fluid path. The pumping assembly may be located downstream of the fluid reservoir. The oral care device may include multiple fluid conduits disposed within the housing, each fluid conduit defining a fluid passageway, and the fluid conduits may each have a compressible region. The multiple fluid passageways may converge within the housing to combine fluid upstream of the outlet.
• The oral care device may be configured so that all of the fluid passageway is replaceable.
• In another aspect, the invention features an oral care device that includes a housing including a fluid passageway for directing fluid within the housing and, at a distal portion of the housing, a head dimensioned to fit within a user's mouth, and a reversible pumping assembly configured to transfer fluid along the passageway.
• Some implementations include one or more of the features described above. Some implementations may include one or more of the following features.
• The reversible pumping assembly may be configured to transfer fluid along the fluid passageway in a direction away from the outlet at the distal portion of the housing. The reversible pumping assembly may include an electric motor. The electric motor may be configured to rotate a rotatable shaft in either a first direction or in an opposite second direction in response to a signal from a controller located within the housing. The oral care device may include a fluid reservoir within the housing and fluidly connected to the fluid passageway, and the reversible pumping assembly may be configured to introduce fluid into the fluid reservoir. The reversible pumping assembly may be configured to introduce fluid from the fluid passageway into the fluid reservoir while the pumping assembly is running in reverse.
• In a further aspect, the invention features an oral care device including a housing including a head, a handle and a neck connecting the head and the handle, the head being dimensioned to fit within a user's mouth, and an energy source for powering the oral care device, in which the housing includes a separable cartridge component that contains a fluid reservoir and the energy source.
• The energy source may be, for example, a battery. The energy source may be electrically connected to a motor configured to drive a pump assembly, e.g., such as the pump assemblies described above.
• In yet another aspect, the invention features an oral care device that includes a housing having a movable head configured to rotate about an axis of rotation, a handle and a neck connecting the head and the handle, the housing defining a housing axis extending between the handle and the head that is perpendicular to the axis of rotation, a fluid passageway located within the neck of the housing and extending to an outlet at the head, and a drive member connected to the head at a location spaced from the housing axis, the drive member being configured to rotate the movable head about the axis of rotation.
• Some implementations may include one or more of the following features. In some implementations at least a portion of the fluid passageway extends substantially parallel to the axis of rotation or co-extends with the axis of rotation. The outlet and the axis of rotation may be spaced-apart from each other. The oral care device may include a drive assembly configured to move the drive member. The drive member may be connected to the head at a location spaced a distance (d) between about 0.05 and about 0.2 inch from the housing axis, e.g., about 0.075 and 0.150 inch from the housing axis, for example about 0.125 inch.
• The invention also features methods of providing oral care using the oral care devices described above. For example, the invention features a method including reducing an uncompressed volume (V0) of a fluid conduit positioned within the oral care device by compressing the fluid conduit to a compressed volume (Vc) within a compressible region defining a path that is not semicircular, wherein the compressed volume (Vc) remains substantially constant as the fluid conduit is compressed progressively along a length (L) to transfer fluid along a fluid passageway within the oral care device. The fluid conduit may be compressed progressively along L by a series of discrete compression events, e.g., using the pumping assemblies described above.
• The invention also features a method including, with a series of successive, side-by-side compression events, compressing a fluid conduit progressively in a compressible region along at least a portion of a length of the fluid conduit to draw fluid into the compressible region and to transfer fluid out of the compressible region along a fluid passageway and toward a fluid outlet at a head of an oral care device. The compressible region may be substantially linear.
• In another aspect, the inveniton features an oral care device including (a) a housing including, at a distal portion of the housing, a head dimensioned to fit within a user's mouth; (b) a fluid conduit defining at least a portion of a fluid passageway in the housing; (c) a pouch disposed within the housing, the pouch comprising a pouch body including two sidewalls defining a volume therebetween; and (d) a fitment providing communication between the pouch body and the fluid conduit. In some implementations, the sidewalls are joined along at least one longitudinal side edge by a seam. In some implementations the fitment has a height to width aspect ratio of less than one, the height and width being measured along minor and major axes, respectively, at an end of the fitment disposed between the sidewalls.
• The pouch volume may increase from an original, unfilled volume as the pouch is filled with content, and decrease as the pouch is emptied. When the pouch is substantially emptied, the pouch volume may be substantially equivalent to the original, unfilled volume.
• In a further aspect, the invention features an oral care device including (a) an elongated housing including, at a distal portion of the housing, a head dimensioned to fit within a user's mouth; (b) a fluid conduit defining at least a portion of a fluid passageway in the housing, the fluid conduit having a compressible region disposed in the housing; and (c) a motorized pumping assembly configured to compress the fluid conduit in the compressible region progressively along at least a portion of the length of the fluid conduit to draw fluid into the compressible region and to transfer fluid out of the compressible region along the fluid passageway toward an outlet at the distal portion of the housing; wherein the pumping assembly is configured to compress the conduit progressively with a series of multiple discrete compression events.
• The invention also features an oral care device that includes (a) an elongated housing including, at a distal portion of the housing, a head dimensioned to fit within a user's mouth; (b) a fluid conduit defining at least a portion of a fluid passageway in the housing, the fluid conduit having a compressible region disposed in the housing; and (c) a motorized pumping assembly configured to compress the fluid conduit in the compressible region progressively along at least a portion of the length of the fluid conduit to draw fluid into the compressible region and to transfer fluid out of the compressible region along the fluid passageway toward an outlet at the distal portion of the housing, the motorized pumping assembly including a drive shaft that is disposed substantially parallel to a plane defined by the compressible region. This relative arrangement of the drive shaft and compressible region provides a compact geometry which allows the pumping assembly to fit within the elongated housing without the diameter of the housing becoming unwieldy.
• The features described above can be combined in any desired combination, with each other and with other features of the oral care devices that will be described below.
• The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features and advantages of the invention will be apparent from the description and drawings, and from the claims.
DESCRIPTION OF DRAWINGS
• FIG. 1 is a side perspective view of an embodiment of an oral care system.
• FIG. 2A is a front perspective view of an embodiment of an oral care device.
• FIG. 2B is a rear perspective view of the oral care device ofFIG. 2A.
• FIG. 3A is a transparent front view of the oral care device ofFIG. 2A.
• FIG. 3B is a transparent rear view of the oral care device ofFIG. 2A.
• FIG. 4A is a side perspective view of an embodiment of a pump assembly and associated fluid passageway.
• FIG. 4B is a perspective detail view of the pump assembly ofFIG. 4A.
• FIGS. 5A and 5B are front and side views, respectively, of an embodiment of an array of compression elements.
• FIGS. 6A and 6B are side and perspective views, respectively, of a screw embodiment.
• FIGS. 7A-7E illustrate a pumping sequence for the pump assembly and fluid passageway ofFIG. 4A.
• FIG. 8 is a side view of elements of a pumping assembly including a flexible membrane.
• FIGS. 9 and 9A illustrates another flexible membrane embodiment.
• FIG. 10A is a perspective top view detailing an embodiment of a drive assembly.
• FIG. 10B shows the drive assembly ofFIG. 10A positioned within the oral care device.
• FIG. 10C is a side view of an alternative cam embodiment.
• FIG. 10D is a perspective view of a guide assembly.
• FIG. 11 is a rear perspective view of an embodiment of a drive shaft.
• FIG. 12 is a sectional drawing of a head of the oral care device ofFIG. 2A.
• FIGS. 13A and 13B are top and perspective views, respectively, of the drive shaft ofFIG. 11 and a fluid passageway connected to the head.
• FIGS. 14 and 15 are front perspective views of two brush embodiments.
• FIGS. 16A and 16B are front and rear perspective views of the head and neck of another oral care device embodiment.
• FIGS. 17A and 17B are front and rear perspective views of the head and neck of another oral care device embodiment.
• FIGS. 18A and 18B are side views of an embodiment of a separable component forming part of the oral care device ofFIG. 2A.
• FIG. 18C is a sectional detail view of area C ofFIG. 18A showing a valve.
• FIGS. 19A and 19B are side and sectional views, respectively, of an embodiment of a separable cartridge component forming part of the oral care device ofFIG. 2A.
• FIGS. 19C and 19D are enlarged detail views of areas C and D, respectively, ofFIG. 19B.
• FIGS. 20A and 20C are front and rear perspective views of an embodiment of a separable component forming part of the oral care device ofFIG. 2A.FIGS. 20B and 20D are transparent front and rear views, respectively, of the component ofFIG. 20A.
• FIG. 21 is a side section view of the valve ofFIG. 19D mated with a docking station valve.
• FIGS. 22A and 22B are side section views of another valve assembly embodiment.FIG. 22C is a front view of a valve fitment ofFIGS. 22A and 22B.
• FIG. 23A is a side perspective view of an embodiment of a docking station.
• FIG. 23B is a transparent side perspective view of the docking station ofFIG. 23A.
• FIG. 24 illustrates a docking station embodiment.
• FIG. 25 illustrates another docking station embodiment.
• FIGS. 26A and 26B are side perspective views of a pump assembly embodiment.
• FIGS. 27A and 27B are side perspective views of a valve actuation assembly.
• FIG. 28 is a diagram of an oral care system control embodiment.
• FIG. 29 is a perspective side view of another embodiment of an oral care device.
• FIGS. 30A and 30B are, respectively, side perspective and transparent views of a separable component forming part of the oral care device ofFIG. 29.
• FIGS. 31A and 31B are, respectively, side perspective and transparent views of a separable component forming part of the oral care device ofFIG. 29.
• FIGS. 32, 33 and34 are perspective views of alternative compression member array embodiments.
• FIGS. 35A and 35B show an alternative screw embodiment.
• FIGS. 36A and 36B are rear and front views, respectively, of the head and neck of another oral care device embodiment with the neck shown as transparent.
• FIG. 37 is a rear view of the head and neck of another oral care device embodiment with the neck shown as transparent.
• FIGS. 38 and 39 illustrate alternative head embodiments.
• FIGS. 40A and 40B are section views of an alternative valve assembly embodiment.
• FIGS. 41, 42 and44 are perspective views of different fluid reservoir embodiments andFIG. 43 is an end view of a fitment ofFIGS. 41 and 42.
DETAILED DESCRIPTION
• Referring toFIG. 1, an embodiment of anoral care system10 is shown that includes anoral care device12, in this case a toothbrush, and adocking station14 that holds theoral care device12 in an upright position within a receiving portion of the docking station. As will be described in much greater detail below,oral care device12 is a power toothbrush having a motorized head and is designed to discharge a fluid, such as a dentifrice or mouthwash or a combination of various fluids, during the brushing cycle. Thedocking station14 is designed to recharge batteries that are located within the oral care device, and to refill the oral care device with the fluid(s).
• Turning toFIGS. 2A and 2B,oral care device12 includes a multi-component,separable housing16 consisting of threeinterconnected components152,154 and156 (see also for exampleFIGS. 18A, 19A and20A). As assembled, theoral care device12 includes adistal portion18 at which ahead20 is located and aproximal portion22 at which ahandle24 is located. Connectinghandle24 andhead20 isneck26.Head20 is sized to fit within a user's mouth for brushing, while thehandle24 is graspable by a user and facilitates manipulation of thehead20 during use.
• Referring toFIG. 2B, showing a rear view of theoral care device12, aninlet28 is positioned near anend surface30 at theproximal portion22 of the oral care device. As will be described in greater detail below, theinlet28 is matable with an outlet280 (FIG. 23A) located at thedocking station14 for refilling a fluid path withincomponent154. By positioning theinlet28 distal of theend surface30, the inlet is spaced above a seating surface275 (FIG. 23A) within the receiving portion of the docking station where substances (e.g., dentifrice, water, dust) may accumulate, so that substances will not interfere with mating between theinlet28 and theoutlet280.
• Referring now toFIGS. 3A and 3B, internal components of theoral care device12 are shown.Oral care device12 includesmotors34 and36.Motor34 drives a pumpingassembly38, that is used to transfer a fluid along a fluid passageway40 (seeFIG. 3B) toward thedistal portion18 of theoral care device12. As will be discussed further below, pumpingassembly38 transfers fluid by compressing a portion oftube60 with a compression element. In some embodiments,motor34 is reversible and can move fluid in an opposite direction, toward theproximal portion22 of theoral care device12. Moving the fluid in the opposite direction may, for example, reduce or, in some cases, even eliminate any leaking of fluid from the head that may occur due to pressure build-up within the passageway.Motor36 drives adrive shaft42, which in turn moves (e.g., rotates) thehead20. To supply power tomotors34,36, arechargeable battery44 is electrically coupled to the motors. A suitable rechargeable battery is a Li Ion UR 14500P, available from Sanyo.
Pump Assembly
• As can be seen more clearly inFIGS. 4A and 4B,motor34 includes arotatable shaft46 that is connected to ascrew48 having an advancing, enlarged spiral50 (FIG. 4B) by a pair ofgears52 and54.Screw48 and spiral50 are shaped to sequentially displace each finger (or compression element) of an array ofinterconnected fingers56 asmotor34 rotates the screw.Fingers56 are secured to an inner wall of the housing16 (FIG. 2A) forming a series of cantilevered projections that are positionedadjacent tube60 within a compressible region58 (FIG. 4A) that, itself, forms a portion of thefluid passageway40. When thefingers56 are displaced, they compress thetube60 within thecompressible region58 progressively along its length in a series of multiple compression events to force fluid along the fluid path (seeFIGS. 7A-7E).
• Generally, themotor34 and the gearing (e.g., gears52 and54) can be selected as desired. Asuitable motor34 is a FF-130SH, available from Mabuchi. In some embodiments, the gearing is selected to reduce speed by about 23:1.
• Referring now toFIGS. 5A and 5B, as shown, the array of fingers includes seveninterconnected fingers56 that extend integrally from acommon base57. While seven fingers are depicted, the number of fingers can be selected as desired (e.g., greater than one finger, up to 10, 50, 100 or 200 fingers). Multiple arrays can also be used. Thefingers56 are interconnected at oneend62 and each extends to afree end64 that can be displaced depending on the angular position ofscrew48. While thepump assembly38 may be used without fingers56 (e.g., spiral50 ofscrew48 may be used to compresstube60 within thecompressible region58 directly), by utilizingfingers56, rolling and sliding wear against thetube60 within thecompressible region58 can be reduced due to the displacement of the fingers in a direction substantially perpendicular to the long axis of thetube60. Such a reduction in rolling and sliding wear can reduce potential for rupture oftube60 that can lead to fluid leakage within thehousing16.
• Generally, the sizes and dimensions of each of the fingers can be selected as desired. As shown, each of thefingers56 is of substantially identical dimensions having a width W_f(e.g., from about 0.05 inch to about 0.2 inch, such as about 0.1 inch) and a length L (e.g., from about 0.4 inch to about 0.6 inch, such as about 0.5 inch) and is shaped to reduce the volume occupied by the fingers within the housing. Referring particularly toFIG. 5B, thefingers56 extend relatively linearly withinregions66 and68, withregion68 offset from region66 a distance T by abend70. In operation,surface72 offingers56 can contact an outer surface of thetube60 andopposite surface74 can contactscrew48 or vice versa. The offset can ensure that a downward force of the finger is fully applied to thetube60. In some embodiments, one or more of the fingers may have a differing dimension.
• Design of thefingers56 depends, at least in part, on the screw design andtube60 design. Eachfinger56 is designed to compress a region of thetube60 that is roughly equal to the width of therespective finger56. The distance between each finger and the adjacent finger is minimized (e.g., about 0.015 inch) for pumping efficiency.
• In general, materials for forming thefingers56 can be selected as desired. Materials preferable for forming the array of fingers include elastic materials having high resistances to fatigue failure (e.g., due to the repeated displacement of the fingers) and capable of withstanding, at least for a reasonable time (e.g., 180 uses or more), the rolling and sliding contact between thefingers56 and thespiral50. A suitable plastic material is DELRIN® plastic. Any suitable method can be employed for forming the fingers, such as molding (e.g., injection molding), casting and machining.
• Referring now toFIGS. 6A and 6B, the defining variables of thescrew48 include the pitch of the screw, the dwell time caused by the flat76 at the top of the pitch. Other variables affecting screw design include the width of the fingers and the number of fingers. The screw pitch P (i.e., the distance center-to-center betweenflats76 along a line parallel to shaft axis, at least in some cases, ensures that at least one (preferably more than one) finger compresses the tube at a given moment in time. As shown, P is about 0.8 inch, while the width of each flat is about 0.035 inch.
• Generally, the dimensions of thescrew48 can be selected as desired. Preferably, however, thescrew48 design depends, at least in part, on the design of thefingers56 and the design of thetube60 withincompressible region58 in order to achieve pumping action to transfer fluid along thepassageway40. As discussed above with regard to the fingers, materials preferable for forming the screw can endure, at least for a reasonable time (e.g., 180 uses, or more), the rolling and sliding contact between the spiral50 and thefingers56. A suitable plastic material is DELRIN® plastic. Any suitable method can be used to form thescrew48, such as molding (e.g., injection molding the screw or over-molding plastic onto, for example, a metal shaft) and machining.
• Referring toFIGS. 7A-7E, diagrammatic illustrations of portions of a displacement sequence are shown for thepump assembly38 shown inFIG. 4A and described above. In this displacement sequence, thefingers56 of the array are sequentially displaced by the enlarged spiral50 (seeFIG. 4B). Prior to compression, withincompressible region58 thetube60 has a substantially constant inner and outer diameter, and an initial, uncompressed volume V₀for a length L (i.e., the length of the compressible region58), with L being substantially equal to the width W of the array of fingers (FIG. 5A). When thefingers56 compress thetube60, the volume over L decreases to a compressed volume V_c. In some embodiments, V_cremains substantially constant during the entire displacement sequence. In certain other embodiments, V_cchanges substantially during the displacement sequence. In either case, it is the geometry of thepassageway40 through which fluid flows that is acted on by a series of discrete and progressive compression events to create flow.
• Referring particularly toFIG. 7A,fingers56aand56bare displaced byscrew48 due to the increased diameter of spiral50 (FIGS. 6A and 6B), which, in turn, compresses (e.g., occludes) a portion oftube60 within thecompressible region58 between thefinger56 and thewall78 to positively displace fluid along thepassageway40. While thescrew48 displacesfinger56a(eventually a maximum distance l), thescrew48 also displacesfinger56b. As thescrew48 turns, referring also toFIG. 5B,finger56abegins a return, drawing fluid into the previously displaced region of thetube60, whilefinger56bis displaced the distance l andfinger56cbegins its displacement. As shown byFIG. 7C, spiral50 is shaped such thatfinger56bis displaced the distance l (or the maximum displacement distance) at least from themoment finger56abegins on its return path and at least untilfinger56cis displaced the distance l. Referring now toFIGS. 7D and 7E, this sequence continues as all sevenfingers56a-56gare displaced (only the displacement of the first fourfingers56a-56dis shown, for brevity) and then repeats until themotor34 stops rotating thescrew48. By displacing more than one finger at all times, the displacement sequence compresses thetube60 relatively continuously along the length L, with relatively little, if any, backflow. Minimizing backflow generally eliminates the need for a check valve to achieve pumping action. In some embodiments, l is substantially equal to or greater than the inner diameter of thetube60 in thecompressible region58, however, l can be less than the inner diameter of thetube60 within thecompressible region58. As shown, the inner diameter of thetube60 in the compressible region is about 1/16 inch and l is slightly greater than 1/16 inch.
• Referring toFIG. 8,flexible membrane80 may be positioned between thefingers56 and the tube60 (seeFIGS. 20C and 20D). Themembrane80 is used to seal the internal components positioned withinhousing component156 from water, paste or other liquids associated with brushing. The membrane can be, for example, adhered toinner wall81 ofcomponent156 and/or over molded on thecomponent156. Referring toFIGS. 9 and 9A as examples, in some embodiments, themembrane80 includes acompression element57 or array of compression elements (or multiple arrays of compression elements) that can be used for compressing thetube60, replacing thefingers56. Additionally, other compression means are contemplated to compresstube60 directly (or to displace the compressible elements), such as a spinning bent wire (e.g., a coiled wire or cam/crank shaft wire), solenoids, pneumatic cylinders, a rocking mechanism and/or annular constrictions with ferrofluids.
• By utilizing the above-described pump assembly, fluid can be positively displaced without backflow and, as mentioned, without any need for a backflow-preventive device, such as a check valve (although a check valve can be used, if desired). The pump assembly described above is particularly well suited to pump slurries, viscous, shear-sensitive and aggressive fluids. Additionally, the fingers, motor, gears, screw, and other internal components can be isolated from the fluid as the fluid travels along thepassageway40, which, in some cases, can increase the life span of theoral care device12.
Head Drive Assembly
• Referring back toFIG. 3A,motor36 moves (e.g., translates linearly) pivotingdrive shaft42, which in turn moves (e.g., oscillates rotationally)rotatable head20. Thedrive shaft42 is connected to therotatable head20 using an offset design that facilitates placement of a fluid outlet at thehead20 and atube82 forming a portion offluid passageway40 within theneck26 of thehousing16. This offset design will be described in further detail below.
• Movement of therotatable head20 is accomplished, in part, by use of a cam and follower system that translates rotational output of themotor36 into linear motion used to drive thedrive shaft42 backward and forward. Referring particularly toFIG. 10A, atrack86 extends outwardly from ashaft84 that is connected to themotor36 by a series of interconnected gears.Follower88 includes a pair ofprojections90 that are designed to ridetrack86 asshaft84 is rotated bymotor36.Track86 is shaped such that asshaft84 rotates, thefollower88 oscillates linearly. Analignment component92 aids in aligning thefollower88 as it oscillates. Although a raised track-follower system is shown, any suitable system can be utilized, such as various other cam systems, including drum cams with followers and grooved tracks with followers. For example, referring toFIG. 10C, an alternative cam design includes acam94 having cam geometry on aninternal surface96 of acup98. In some cases, the cam follower can run axisymmetric with the motor. Non-cam systems can also be used, such as a belt or chain system. A belt or chain system can replace the drive shaft system shown to drive thehead20 while leaving the axis of theoral care device12 available to make way for thefluid passageway40.
• Connected tofollower88 is anintermediate drive shaft100.Intermediate drive shaft100 is slidably positioned within aguide assembly102 that is secured directly to thehousing16. Referring toFIG. 10D, theguide assembly102 includes a gasket104 (e.g., formed of rubber), a bushing106 (e.g., a bronze oilite bushing) and a mountingplate108. The mountingplate108 is secured to the housing16 (seeFIG. 10B). Theguide assembly102 provides alignment and stabilization for theintermediate shaft100 as the intermediate shaft moves forward and backward with thefollower88.
• Referring toFIG. 10B, a pivotingdrive shaft42 is coupled to theintermediate drive shaft100. Thedrive shafts100 and42 are coupled by a pair of interconnectingnotches110A,110B, which are constructed to engage each other.Notch110A is positioned at an end of the shaft42 (FIG. 11) andnotch110B is positioned at the adjacent end of intermediate shaft100 (FIG. 10A). Driveshaft42 is slidably positioned within abracket112 that is secured within theneck26 of the housing16 (shown in phantom) to restrict side-to-side movement ofshaft42 and to maintain the connection between thenotches110. Thenotches110 are detachable (e.g., to separatecomponents152 and154) by applying a force (e.g., by a consumer) to thebracket112 in a direction that separates thenotches110. Thebracket112 has sufficient flexibility to allow thenotches110 to detach when pushed on by a consumer to allow the consumer toseparate component154 fromcomponents152 and156.
• As can be seen, the available space within theneck26 ofhousing16 is relatively limited. As a result, thedrive shaft42 is shaped to facilitate placement of both the fluid-carryingtube82 and theoscillating drive shaft42 within theneck26 of thehousing16. Shown more clearly inFIG. 11, thedrive shaft42 includes a number ofbends114,116 that aid in maintaining distance between thefluid passageway40 and thedrive shaft42 so that thetube82 does not interfere with motion ofdrive shaft42. Theshort bend114 is connected torotatable head20 and is designed to be short enough to be assembled through theneck26 ofhousing16. This can allow theshaft42 to be assembled through an opening in the bottom of component152 (seeFIG. 10B) and facilitates use of a relatively narrow,unitary housing component152. Thebend114, however, is long enough to drive therotatable head20. By includingbends114,116, there is a reduced probability that thedrive shaft42 andtube82 will interfere with each other's operation in use.
• Referring now toFIG. 12,rotatable head20 is rotatably connected tohousing16 within asocket118 formed inhousing16. A non-rotatable fitting (e.g., a bushing)120 is secured over a distal end of thetube82 and avalve122 is fitted over the fitting120. Thevalve122 and fitting120 extend through anaperture124 in therotatable head20 such that, of thevalve122 and the fitting120, thenon-rotatable fitting120 receives much of forces from therotatable head20 during operation, thus reducing wear and tear on the valve. Apin126 secures therotatable head20 in thehousing16 by passing through ahole128 in thehousing16 and into aslot130 formed in therotatable head20. Thispin126 and slot130 connection secures therotatable head20 within thehousing16 and allows therotatable head20 to rotate.
• Referring also toFIGS. 13A and 13B, thedrive shaft42 is connected to therotatable head20 at a hole (not shown) formed in therotatable head20 and positioned offset from alongitudinal axis131 by a distance d (e.g., greater than zero, such as from about 0.05 to about 0.2 inch, such as about 0.125 inch). Thelongitudinal axis131 is perpendicular to an axis of rotation134 (FIG. 13B) of the head, and distance d is measured perpendicularly from thelongitudinal axis131 to the center of the hole. Theshaft42 is slip fit into the hole to allow oscillation of therotatable head20 relative toshaft42. Asdrive shaft42 translates backward and forward, therotatable head20 oscillates aboutaxis134 at a desired frequency (e.g., from about 35 Hz to about 140 Hz, such as from about 50 Hz to about 80 Hz.).
• Referring toFIGS. 14 and 15,head20 includes a base136 that includes the opening124 (seeFIG. 12) through which thevalve122 extends outwardly beyond the base. Although any suitable valve can be employed, such as a duckbill valve or other types of check valves, the duckbill valve is preferred for ease of use and for reducing the introduction of outside fluids and particles into the fluid passageway (e.g., during use and storage). In some embodiments, the distal end of thetube82 forms the fluid outlet without use of a valve attached thereto. In some embodiments, opening124 forms a portion of the fluid passageway.
• Extending from thebase136 is an array ofbristle tufts138. Although eachtuft138 is shown as a solid mass in the drawings, the tufts are actually each made up of a great mass of individual plastic bristles. The bristles may be made of any desired polymer, e.g., nylon 6.12 or 6.10, and may have any desired diameter, e.g., 4-8 mil. Thetufts138 are supported by thebase136, and may be held in place by any desired tufting technique as is well known in the art, e.g., hot tufting or a stapling process. Thetufts138 may also be mounted to move on thebase136, as is well known in the toothbrush art. For a more detailed discussion of brush heads, Applicants refer to pending U.S. application Ser. No. 10/666,497, filed Sep. 9, 2003, the disclosure of which is hereby incorporated by reference in its entirety.
• Generally,tufts138 and fluid outlet140 (along with opening124) may be positioned where desired. Referring toFIG. 14 andFIG. 15,tufts138 are positioned about centrally locatedvalve122. Referring particularly toFIG. 14, a contoured ellipse head design is illustrated wherebase136 is in the form of an ellipse. Thevalve122 is shown positioned at about the center of the elliptical base136 (i.e., at the intersection of the major and minor axes of the ellipse) with thetufts138 arranged about thefluid outlet140 in an elliptical arrangement.FIG. 15 shows a more circular head design withvalve122 positioned at the center of thebase136 and thetufts138 positioned about thefluid outlet140 in a circular arrangement.
• It is not required, however, that thevalve122 and associatedfluid outlet140 be positioned centrally within therotatable head20 or that the fluid outlet be aligned with the axis ofrotation134 of therotatable head20. For example, referring toFIGS. 16A and 16B, amovable head142 includes an offset valve design. In this embodiment, avalve122 and associatedfluid passageway40 extends through arotatable head142 spaced from an axis ofrotation134. As above, adrive shaft42 is connected to therotatable head142 offset from alongitudinal axis131. As another example, referring toFIGS. 17A and 17B, ahead146 includes amovable portion148 and astationary portion150 with avalve122 and associatedfluid passageway40 positioned in thestationary portion150. As an alternative, thevalve122 can be positioned within themovable portion148, as described above, rather than in thestationary portion150. Themovable portion148 can be formed by a rotatable head that is connected to a drive shaft, as described above. In some embodiments, thedrive shaft42 includes a fluid path that forms a portion offluid passageway40 by fluidly connecting thedrive shaft42 totube60. An end (not shown) of thedrive shaft42 that is connected to the head can provide a fluid outlet, or a valve or other structure can be attached to the end of the drive shaft.
Valves and Seals
• Referring now toFIGS. 18A-19B and20A-20D, as noted above,housing16 is separable into threecomponents152,154 and156. Component152 (i.e. a removable head assembly;FIGS. 18A and 18B) includesmovable head20 andneck26 along withdrive shaft42 andtube82. Component154 (i.e. a removable, refillable cartridge assembly;FIGS. 19A and 19B) includestube60, compressible region58 (FIG. 19B) andinlet28.Motors34 and36 are housed bycomponent156, along with pumpingassembly38 and rechargeable battery44 (seeFIG. 3B).
• Because each ofcomponents152 and154 contain a portion offluid passageway40, in order to reduce or, in some cases, to prevent fluid leakage whencomponents152 and154 are separated, each of thecomponents152 and154 includes avalve160 and162, respectively, having a “normally closed” construction. The valves are disposed at an end of the associated conduit, e.g., to close substantially the entire fluid passageway associated with each component when the components are disengaged.
• Referring toFIGS. 18A and 18C, theneck valve160 is capable of mating with the cartridge valve162 (seeFIGS. 19A and 19C). Referring to bothFIGS. 18C and 19C,neck valve160 andcartridge valve162 includeinner surfaces164 and166, respectively, that each form a portion offluid passageway40. Nearopenings126 and128,inner surfaces164 and166 neck-down, reducing the inner diameter of the fluid passageway, to form seating surfaces172 and174. Biased against seating surfaces172 and174 arepoppets176 and178.Poppets176,178 haveouter surfaces180,182 that are contoured to complement the contour of the respective seating surfaces172 and174. The poppets are biased against the seating surfaces172,174 byhelical springs184,186 (e.g., between about 0.250 and 0.375 inch long with an overall outer diameter of between about 0.120 and 0.240 inch; formed from, e.g., stainless steel wire between about 0.014 and 0.018 inch in diameter) to close thefluid passageway40 whencomponents152 and154 are separated (e.g., forming a fluid-tight and/or air-tight seal). The valves can be constructed to remain closed and seal the passageway even if an amount of positive pressure is applied within the passageway (e.g., the pumping mechanism is activated). As positive pressure is applied to the respective poppet from within the passageway, an increased amount of biasing force is transmitted and the poppet applies more force against the seating surface maintaining the seal.
• Referring toFIGS. 19B and 19D, thecartridge component154 includes asecond valve200 that is capable of mating withdocking station valve322 at outlet280 (FIGS. 21 and 23A).Valve200 includes the features described above with regard tovalve162, andvalve322 includes the features described above with regard tovalve160.Valve200 controls fluid flow through theinlet28 positioned near the base surface30 (seeFIG. 2B), whilevalve322 controls fluid flow through thedocking station outlet280. To illustrate operation of the valves, referring toFIG. 21, each of thepoppets176 and178 include anextended portion188. Theextended portions188 project beyond the seating surfaces172,174 when the valves are separated. When thevalves200 and322 are mated, theextended portions188 of thepoppets176,178 contact each other. In some embodiments, only one or neither ofpoppets176,178 has an extendedportion188 that extends beyond the respective seating surface. As thevalves200 and322 approach one another, thepoppets176,178 deflect away from the seating surfaces, thus opening thefluid passageway40 and allowing the flow of fluid therethrough. When mated, the valves are also constructed to remain open during use as pressure is applied to the poppets, e.g., by fluid flowing within the passageway. This can be accomplished by restricting motion of the respective poppets when the valves are open.
• To seal thefluid passageway40 from the surroundings when the valves are mated,cartridge valves162 and/or200 can include a sealing ring201 (e.g., an O-ring) positioned within arecess192 extending inwardly from anouter surface194 of the cartridge valve. In some embodiments, the sealing ring provides a fluid-tight seal, but not an airtight seal. In some cases, the sealing ring provides both a fluid-tight and an airtight seal. The sealing ring can be sized to contact aninner surface190 of thevalves160 and/or322.
• Referring toFIG. 18C, theneck valve160 incorporates aportion165 of theneck26 as part of the valve assembly. Theneck valve assembly160 is directly connected to the proximal open end oftube82, allowing fluid passage directly from the valve intotube82. Referring toFIG. 19C, thecartridge valve162 is connected totube60 by means of abarbed fitting203 at the rear of the assembly. Other methods of attachment, such as clamps, wire or plastic tie wraps and/or adhesives are also possible.
• In some embodiments, an alternative valve assembly is used that closes thefluid passageway40 in only one component, when the components are separated. Referring toFIGS. 22A-22C, a one-sided valve assembly250 includes avalve252 and an open fitment254 (seeFIG. 22C). Thevalve252 includes aninner surface256 that is necked-down to form aseating surface258 and apoppet260 with anextended portion262 that is biased toward theseating surface258. Thefitment254 includes aninner surface266 forming a passageway for fluid flow and awall268 that spans the passageway of the fitment. Thewall268 includes fourchannels270 that are in fluid communication with the passageway. Thechannels270 provide a conduit through which fluid can flow from thefitment254 to the valve252 (or vice versa) when thevalve252 is mated with thefitment254.
• Asvalve252 is mated withfitment254, turning toFIG. 22B, theextended portion262 is brought into contact withwall268. As asurface272 of thevalve252 approacheswall268,poppet260 is deflected away from seatingsurface258, opening thevalve252. Thechannels270 are positioned such thatpoppet260 does not block thechannels270 so that fluid can pass therethrough. In some embodiments, thefitment254 replaces the neck valve160 (e.g., to allow for rinsing of thepassageway40 within neck component152).
• Generally, the materials for forming the fitment and valves, including the poppets and springs, can be selected as desired. Suitable materials for forming the valves include polyethylene (e.g., HDPE), polypropylene, acrylonitrile-based co-polymer (e.g., BAREX® available from BP p.l.c), acetal (POM), or corrosion resistant metals, such as stainless steel. Suitable materials for forming the poppets include elastomers such as ethylene propylene diene monomer (EPDM), nitrile rubber (NBR), fluorocarbons (e.g., VITON® fluorocarbons, available from DuPont Dow Elastomers L.L.C.), combinations of these materials and any of these materials used in combination with a harder material such as stainless steel. The valves can be formed by any suitable method including molding (e.g., injection molding) and/or machining, with common joining processes such as ultrasonic or laser welding, adhesives and the like.
• Components152 and154 are designed to be replaceable. By “replaceable”, we mean thatcomponents152 and154 are interchangeable by the consumer with other like components to form an assembled oral care device, and that replacement can normally be effected by the consumer without damage to the oral care device. As can be appreciated from the above description, because the entirety offluid passageway40 is carried bycomponents152 and154, the entirety offluid passageway40 is also replaceable. In other words, any part oforal care device12 that touches fluid is replaceable. This facilitates use of different types of fluids with the oral care device without undesired mixing of the fluids and repair of the oral care device (e.g., due to fluid passageway rupture, valve malfunction, and the like). This also helps to maintain the oral care device in a sanitary condition during extended use.
• To assemble theoral care device12, components152 (head assembly) and154 (cartridge) both attach tocomponent156 by independent mechanical snap latching mechanisms137 (FIGS. 2A and 2B). Referring toFIGS. 18A and 20A,component152 is attached tocomponent156 by inserting atop end133 of thecomponent156 into a receivingend135 ofcomponent156. In doing so, a mechanical connection is formed by snap latch members139 (FIG. 18B) and141 (FIG. 20A), thedrive shafts42 and100 are connected and, ifcomponent154 is connected tocomponent156, a fluid connection is made through thevalves160 and162.Component154 is attached tocomponent156 by a similar snap latch connection (see alsoFIG. 19A). To detachcomponents152 and154 fromcomponent156, a user can squeeze the snap latches137 toward each other to disengage the mechanical connection. This is accomplished by pinchingbuttons143 located at thehandle24 to detachcomponent154 fromcomponent156 and by pinchingbuttons143 located at theneck26 to detachcomponents152 and156. Other connections are contemplated, such as an independent screw or bayonet-style collar that can move independently of the orientation of the components being attached. Because both a drive shaft and fluid line connection must be made, a linear connection (e.g., as opposed to a rotational) is preferred to align the two connections. Other general attachment arrangements can be made, such as attachingcomponent152 tocomponent154, and subsequently, attachingcomponent154 tocomponent156.
Oral Care Device Controls
• Referring back toFIG. 3A, theoral care device12 includes a control circuit orcontroller400 that is electrically connected to themotors34,36 and that generally governs operation of the motors. Auser interface402 provides external interaction withcontroller400. Theuser interface402 includes on and offbuttons404 and406 and afluid level switch408, all of which are accessible from exterior of the housing16 (seeFIG. 2A).
• While the controller can be programmed as desired, as one example, the controller is designed such thatdepressing button404 initiates bothmotors34 and36 anddepressing button406 initiates only one of themotors34,36, such asmotor36. By depressingbutton404 both head movement and fluid flow can be initiated. By depressingbutton406, only one of fluid flow and head movement can be initiated.Depressing button404 or406 can also halt the associated motor(s) subsequent to initiation. In cases wherebutton406 initiates and halts onlymotor36, a user can, for example, brush without additional fluid delivery and can rinse theoral care device12 while the head rotates. Thefluid level switch408 allows a user to choose between preselected rates of fluid delivery, such as high (e.g., about 1.1 g/minute), medium (e.g., about 1 g/minute) and low (e.g., about 0.9 g/minute) rates. Three LED's410 can selectively illuminate to indicate a selected fluid delivery level. As an alternative or in addition, an LCD display can be included to convey a fluid delivery level and/or can be used to display other information such as level of fluid in theoral care device12 and/or status of battery charge.
• As mentioned above, thecontroller400 can be programmed as desired. Preferably, thecontroller400 is programmed to adjust a paste delivery level subsequent to initiation of themotor34. In some embodiments, the controller is programmed such that a relatively large bolus of fluid is delivered soon aftermotor34 is initiated, e.g., to have enough paste to begin brushing, and then the level of paste delivery is decreased, e.g., to a lower delivery level throughout the remaining portion of the brushing cycle. The level of paste delivery may be decreased, for example, by intermittent bursts of fluid and/or by slower rates of fluid delivery. As an example, the controller may be programmed to provide three delivery settings, low, medium and high. In one embodiment, at the low delivery setting, the controller is programmed to deliver a bolus by activating themotor34 for about seven seconds. After about seven seconds, the controller intermittently activates themotor34 for about 0.75 seconds and deactivatesmotor34 for about 2.4 seconds (i.e., cycles the motor on and off at these intervals). In the same embodiment, at the medium delivery setting, the controller is programmed to deliver a bolus by activating themotor34 for about seven seconds, and then to cycle the motor on for about 0.75 seconds and off for about 1.63 seconds. At the high delivery setting, the controller is programmed to deliver a bolus by activating themotor34 for about seven seconds and then to cycle the motor on for about 0.75 seconds and off for about 1.2 seconds. Depending on the desired programming of thecontroller400, more or fewer user interface controls can be used to initiate various functions.
Docking Station
• When not in use,oral care device12 can be coupled withdocking station14.Docking station14 can be connected to an electrical outlet (not shown) or other suitable power supply.
• Referring toFIGS. 23A and 23B,docking station14 is formed to holdoral care device12 within the receivingportion273 in an upright position. The receivingportion273 is formed between avertical recess295 formed inhousing291 andhousing extension297 extending from base293. Therecess295 is contoured to receive a portion oforal care device12. Thedocking station14 includes a reactive device, e.g., a sensor (not shown) that detects an input upon receipt of the oral care device by the docking station and, in response to this input, sends a signal to a controller, the details of which will be described in greater detail below.
• Referring now toFIG. 23B, thedocking station14 includes a fluid reservoir274 (seeFIGS. 24 and 25) that is coupled with atube276 that forms a portion of afluid passageway278 extending from thefluid reservoir274 tooutlet280. In some embodiments, as shown byFIG. 24, thefluid reservoir274 is formed as an integral part of a separable,replaceable portion301 of thedocking station14. In other embodiments, illustrated byFIG. 25, areplaceable pouch303 forms the fluid reservoir. In this case, theupper portion301 of the docking station is removable, to allow the consumer to easily removepouch303 when its contents are exhausted, or when the user wishes to use a different product, and insert a replacement pouch.
• Referring toFIG. 23B, to move fluid along the fluid passageway, the docking station includes areversible pump assembly282. As can be seen more clearly inFIGS. 26A and 26B, thepump assembly282 is similar to the pump assembly depicted byFIGS. 4A and 4B in that it includes amotor284, ascrew286 having an advancing spiral of enlarged dimension (seeFIG. 26A), and an array ofinterconnected fingers290 positioned to sequentially compress acompressible region277 of thetube276. In some embodiments, themotor284, screw286 including spiral andfingers290 are of a construction substantially identical to the constructions described above. Other pump assemblies are also contemplated for moving fluid, particulate and/or powder along the passageway, such as a diaphragm pump, piston pump, compressed gas, gear pump, etc.
• Themotor284 is mounted, using abracket294, on asupport plate296 that is secured to a floor298 (seeFIG. 23B) of thebase station14. Thefingers290 are secured along their base (see, for example, element53 ofFIG. 5A) to aplate305 that is secured to asupport member300, which is mounted to side surfaces of pair ofguide plates306 and308 (FIG. 26B). Mounted in this manner, thefingers290 form a series of cantilevered projections positioned adjacent thetube276. Theguide plates306,308 are each mounted at their lower surfaces to thesupport plate296.Guide plate308 includes anaperture309 sized to receive acoupling member311 that connects the output from the gearbox to thescrew286 and guideplate306 includes anaperture309 that receives thescrew286.
• Referring again toFIGS. 26A and 26B, apositioning plate310 is provided to position the fluid-carryingtube276 so that the compressible region292 is adjacent thefingers290. Thepositioning plate310 is mounted to an upper surface of theplates306,308, and includes openings, defined by the lower surface of thepositioning plate310 and recesses312 and314 in the upper surfaces of each of theguide plates306,308, through which thetube276 passes. Because thetube276 is positioned and held in place by these openings, when thefingers290 are displaced they compress thetube276 in the compressible region292 progressively along its length in a series of multiple compression events to force fluid along the fluid path.
• Generally,motor284 can be selected as desired. A suitable motor is a FF130SH, available from Mabuchi. Thescrew286, thefingers290 and the displacement sequence can be identical to those described above with reference toFIGS. 7A-7E.
• Downstream of thepump assembly282,tube276 is connected to a drive assembly316 (FIG. 27A) that is used to extend and retractvalve322 to engage and disengage, respectively,valve200 of theoral care device12. Althoughvalve322 is depicted, any suitable coupling can be used that is constructed to couple with the oral care device and provide communication between thefluid reservoir274 and the oral care device. Thedrive assembly316 includes amotor318 capable of moving asled320 that is connected to thevalve322, which is fluidly connected (e.g., using a barbed fitting) to thetube276. Referring now toFIGS. 27A and 27B, thevalve322 is slidably positioned within a fixedbushing324. To move thesled320 and associatedvalve322, themotor318 and an associatedgear box328 are connected to alead screw330, using a coupling which is threadably connected to thesled320. As themotor318 rotates thelead screw330, thesled320 is pulled or pushed toward or away from themotor318, depending on the direction of rotation of thelead screw330. Thelead screw330 is connected to a pair ofbearings334, which aid in positioning thelead screw330. As noted above,valve322 is positioned atoutlet280 to control the flow of fluid from theoutlet280, and is matable withvalve200 that controls fluid flow into theinlet28 of theoral care device12. As an alternative, in some embodiments, the valve can be mechanically actuated using other drive mechanisms, for example, a spring mechanism (e.g., by spring-loading the valve and releasing the valve using a button) and/or a lever that can cause the valve to extend and/or retract.
• Referring back toFIG. 23B, a pair ofleads336,338 are exposed within the receivingportion273 of thedocking station14.Leads336,338, are positioned to contact a pair ofcontacts340,342 (FIG. 2A) on theoral care device12 when theoral care device12 is placed within the receiving portion173. This contact will electrically couple theoral care device12 and thedocking station14, so that the power source to which the docking station is connected can recharge the rechargeable batteries within the oral care device.Contacts340,342 are electrically connected with the rechargeable batteries, allowing power to flow from the docking station to the batteries.
• With reference toFIG. 28, by placing theoral care device12 within receivingportion273 such thatcontacts340,342 mate withleads336,338 a charging circuit is closed, which is recognized by the controller. When the charging circuit is closed, therechargeable batteries44 begin to charge. The charging circuit can include an inductive component for charging thebatteries44 inductively. In some embodiments, the oral care device is electrically connected to the docking station mechanically or by using a signal from a magnetic field, electrical field or radio frequency identification (RFID), as examples. As the charging process begins, themotor318 of thedrive assembly316 is activated and thevalve322 projects forward to mate with the valve200 (FIG. 2B) in thehandle24. A limit switch (not shown) determines the end of travel of thevalve322. Once the limit switch is actuated, thevalve322 can be projected forward by thedrive assembly316 for an additional selected period of time (e.g., about two seconds), which can ensure thatvalves200 and322 are seated. During the selected period of time, thevalve322 may or may not travel forward. The selected period of time for travel is primarily used to help ensure that that thevalves322 and200 are mated.
• Upon activation of the limit switch and expiration of the selected period of time, the controller is programmed to determine if a pressure switch (not shown) has been actuated. The pressure switch is plumbed into the passageway278 (or, in some embodiments, intopassageway40 of oral care device12) and will actuate when pressure in the passageway exceeds a preselected threshold, e.g., eight psi (preferably between six and ten psi). If this threshold is exceeded, this indicates that thefluid passageway40 in the oral care device is full. Once the valves are mated, if the fluid path in the oral care device is not already full (i.e., if the pressure switch is not activated) then the pumpingassembly282 is activated and pumps fluid from thereservoir274 in the docking station to thefluid passageway40 withincomponent154 of theoral care device12, refilling the supply of fluid within the fluid path of theoral care device12.
• If, however, the controller detects that the pressure switch is actuated prior to activating the pumping assembly282 (i.e., if the fluid passageway of the oral care device is already full when the oral care device is placed on the docking station), themotor284 is not activated and thevalve322 is retracted until a rear limit switch (not shown) is actuated.
• During a refill operation, when pressure in the passageway reaches the threshold the pressure switch is actuated and the controller signals themotor284 to deactivate to discontinue pumping of fluid and signals thedrive assembly316 to retract thevalve322 to its starting, closed position. As an alternative, in some embodiments, upon actuation of the pressure switch, the controller opens a bypass valve that directs fluid back to the fluid reservoir. A similar operation can also be accomplished, for example, by use of a pressure relief valve, which does not require a pressure switch. The rear limit switch actuates when thevalve322 is retracted to its starting position.
• As explained above, thefluid passageway40 is filled until pressure within the passageway reaches the preselected threshold, indicating that thecomponent154 has reached a predetermined capacity. As an over-spill prevention measure, the controller can deactivatemotor284 after a selected time period (e.g., one minute, preferably between 30 seconds and 2 minutes) has lapsed, regardless of whether the pressure switch has actuated. This can prevent thedocking station14 from emptying the fluid reservoir274 (e.g., in the event of a valve mating problem or a broken component154). When thevalves322 and200 are mated (FIG. 19), theoral care device12 cannot be removed from receivingportion273. The mated valves lock theoral care device12 to thedocking station14, e.g., to maintain a fluid connection between theoral care device12 and thedocking station14.
• In some embodiments, only one motor housed within thedocking station14 is used to drive thevalve322 and to pump fluid along thefluid passageway278. In these cases, a clutch can be used to selectively engage the motor with the drive assembly and the pump assembly. In some cases, thepump assembly38 within theoral care device12 is used to pull fluid from the fluid reservoir of the docking station to refill thepassageway60 within thecartridge component154. This can render unnecessary thepumping assembly282 within thedocking station14.
• Referring now toFIG. 29, an alternativeoral care device400 is shown that includes a separablebi-component housing402 with a separable andreplaceable cartridge404. Similar to theoral care device12 described above,oral care device400 is a power toothbrush having a motorized head and is designed to discharge a fluid, such as a dentifrice or mouthwash or a combination of various fluids, during the brushing cycle. As will be discussed in detail below, theoral care device400 includes abody component418 and theseparable cartridge component404 that includes both a fluid reservoir (that can be refillable and/or disposable) and batteries (that can be rechargeable or disposable) or other power source. The body and cartridge components are secured together bysnap latch419. In some embodiments, theentire cartridge component404 is disposable.
• As assembled, theoral care device400 includes adistal portion406 at which amovable head408 andneck410 is located and aproximal portion412 at which ahandle414 is located. Thehead408 is sized to fit within a user's mouth for brushing, while thehandle414 is graspable by a user and facilitates manipulation of thehead408 during use. Theoral care device400 includes auser interface416 in the form of an on/off button.
• As noted above, thecartridge component404 is separable from the body component418 (seeFIG. 31A). As shown inFIGS. 30A and 30B, thecartridge component404 is a removable, replaceable cartridge capable of carrying a fluid (e.g., dentifrice, mouthwash, water) within a fluid reservoir405 (e.g., a rigid container or a flexible pouch). Thebody component418 also includes a power source420 (seeFIG. 30B). By providing thecartridge component404 with a power source (e.g., one or more batteries) and a fluid reservoir, the need for a docking station capable of both refilling and recharging the cartridge component, can be eliminated. In some embodiments, a refilling station, a recharging station and/or a combination of a refilling and recharging station is provided for refilling thecartridge component404 and/or recharging thepower source420. In other embodiments, a simple docking station that neither refills nor recharges may be provided as a holder for the oral care device.
• Referring now toFIGS. 31A and 31B, thebody component418 includes themovable head408, and, housed internally within thebody component418, a pair ofmotors34 and36.Motor34 drives apumping assembly438 that is used to transfer a fluid along afluid passageway40 toward thehead408 of theoral care device400. In some embodiments,motor34 is reversible and can move fluid in an opposite direction, toward the proximal portion of the oral care device400 (e.g., to reduce or, in some cases, even eliminate any leaking of fluid from the head that may occur due to pressure build-up within the passageway).Motor36 drives a drive shaft442, which in turn moves (e.g., rotates) thehead408. When thecartridge component404 is connected to the body component418 (as shown inFIG. 29), thepower source420 is electrically coupled to themotors34,36 for providing power thereto.
• The head drive assembly is similar to the head drive assembly of theoral care device12, discussed above, in that thedrive shaft42 is connected to therotatable head408 using an offset design that facilitates placement of a fluid outlet at thehead408 and atube422 forming thefluid passageway40 within theneck410 of thehousing402. Thedrive shaft42 is moved by use of a cam and follower system that translates rotational output of themotor36 into linear motion used to drive thedrive shaft42 backward and forward. In some embodiments, the head drive assembly is substantially identical to that shown byFIGS. 10A-13 (and may include any alternatives) as those described above.
• As can be seen byFIG. 31B, the pumpingassembly438 is similar to thepump assembly38 depicted byFIGS. 4A and 4B in that it includes themotor34, ascrew48 having an advancingspiral50 of enlarged dimension, an array ofinterconnected fingers56 and atube422 having acompressible region58 that forms at least a portion offluid passageway40. In some embodiments, themotor34, screw48 includingspiral50,tube422 andfingers56 are of substantially identical construction to the constructions described above, and may include any of the alternatives discussed above.
• Each of thehousing components404 and418 contains a portion offluid passageway40. In order to reduce or, in some cases, to even prevent fluid leakage from thefluid passageway40 whencomponents404 and408 are separated,valves160 and162 having a “normally closed” configuration are provided at the proximal end of thebody component418 and at the distal end of thecartridge component404, respectively. (Suitable valves having a “normally closed” configuration are shown, for example, inFIGS. 18C and 19C and discussed above. Other types of valves may be used, such as that described with reference toFIGS. 40A and 40B below.) As discussed above with respect to the valves shown inFIGS. 18C-19C,valves160 and162close passageway40 when thebody component418 and thecartridge component404 are separated, and allow fluid flow throughpassageway40 when the components are joined.
OTHER EMBODIMENTS
• Referring now toFIGS. 32, 33 and34, three alternative compression element arrays are shown that include compression elements havingmultiple bends508, e.g., to facilitate placement of the compression element arrays within the oral care device. The curvature can be 180 degrees, as shown, but other configurations may be used, such as a 90 degree curvature. Referring toFIG. 32,compression element array500 includes multiple,interconnected compression elements502. Each of thecompression elements502 is supported at both ends bybases504, each of thebases504 also interconnecting theelements502 of the array. Thecompression elements502 are formed to buckle upon application of a force, such as that applied byscrew48. As theelements502 buckle, an associatedcompression surface506 is displaced, which, in turn, can displace, for example, an adjacent compressible tube. Referring toFIG. 33, anothercompression array510 includes multiple,interconnected compression elements512 that are supported at only one end by abase504.
• Referring now toFIG. 34,compression array600 is capable of compressing a pair of compressiblefluid conduits602 and604 to pump fluid along a pair of associatedfluid passageways606 and608 (shown by dashed lines). Thecompression elements610 extend from a common base612 that also interconnects eachcompression element610 of the two arrays. An advantage of the embodiment shown is that a single shaft with spiral can be utilized to displace both arrays of compression elements by placing the shaft with spiral (not shown) between the two arrays ofcompression elements610. In some embodiments, multiple, separate arrays of compression elements can be used, such as that shown byFIG. 5B, along with multiple shafts with spirals, such as that shown byFIG. 6A, to pump fluid along multiple, respective passageways.
• Analternative screw embodiment700 is shown byFIGS. 35A and 35B wherespiral702 is formed of multiple,discontinuous projections704. Theprojections704 are arranged and formed to displace an array of compression elements, e.g., as described above with reference toFIGS. 7A-7E.
• As indicated above, the oral care device can include more than one fluid passageway. Referring toFIGS. 36A and 36B, the oral care device includes a pair oftubes514 and516 to direct two fluid streams (e.g., of the same or of differing fluids) within the oral care device. As shown, each of thetubes514 and516 is connected to the head at a location offset from alongitudinal axis531 perpendicular to an axis ofrotation518 of themovable head408. In some embodiments, one of thetubes514,516 may be connected to the head at the axis ofrotation518 and the other connected at a location offset from the axis ofrotation518. Referring toFIG. 37, a variation is shown wheretubes550 and552 are fluidly connected to each other downstream of the pumping assembly and upstream of a fluid outlet at the head. This embodiment may be advantageous where it is desirable to mix fluids within the passageways at a time just prior to delivery to a brushing surface.
• Referring toFIGS. 38 and 39, the head may include aprophy cup620,622 (or other guiding member, such as a pick). As shown byFIGS. 38 and 39, the prophy cups620 and622 extend frombase624 and aroundnozzle626. InFIG. 39, theprophy cup622 is castellated and includesopenings628 positioned along aridge630 of the prophy cup, which can aid in cleaning.
• FIGS. 40A and 40B illustrate analternative valve assembly800 embodiment, e.g., to replacevalves160 and162 which can provide communication between thehead component152 and the cartridge component154 (see, e.g.,FIGS. 18B and 19B) and/or to replace thevalves200 and322 which can provide communication between thecartridge component154 and the docking station14 (see, e.g.,FIG. 21).Valve assembly800 includes afitment802 having apassageway804 extending therethrough. Positioned within thepassageway804 is a spring-biasedball806 that is biased by aspring808 toward asealing ring810 extending into and coaxial with thepassageway804. Referring toFIG. 40A,valve assembly800 is shown in a closed position with theball806 biased against the sealingring810 sealing thepassageway804. Referring now toFIG. 40B,valve assembly800 is shown in the open position with theball806 forced apart from the sealingring810 by aconduit812 that is received by thefitment802. Theconduit812 includesmultiple ports814 extending through asidewall816 of theconduit812. Theports814 allow fluid to pass therethrough and into thepassageway804 when anend818 theconduit812 abutsball806. In the open position, fluid, particulate or any other suitable material can flow past theball806 during use toward and/or, in some embodiments, away from, e.g., thehead20 oforal care device10.
• Referring now toFIGS. 41 and 42, fluid reservoirs suitable for use with certain oral care device embodiments, e.g., oral care devices including one or more features described above, are in the form of refillable pouches850 and900, respectively. As shown, pouches850 and900 are refillable. In some cases, the pouches are replaceable and can be disposable, e.g., when the pouch is emptied. Pouch850 and900 includes a pair ofsidewalls852,854 that are joined along opposite longitudinal side edges856,858 byrespective seams860 and862. In some embodiments, the side edges can be joined along one longitudinal side edge by a seam and along an opposite longitudinal side edge by a fold. Thesidewalls852,854 are also joined along atop edge864 and abottom edge866 byseams868,870. Thesidewalls852,854 form apouch body872 having a volume formed between the sidewalls.
• Extending into thepouch body872 and having an end882 (FIG. 43) disposed between thesidewalls852,854 at thetop edge864 is afitment874.Fitment874 provides communication between thepouch body872 and the fluid conduit extending through the oral care device. In some embodiments, referring toFIG. 44, thefitment880 extends through an opening formed insidewall852. Referring again toFIGS. 41 and 42, connected to thefitment874 isvalve200 having a normally closed construction, as described above.
• Referring now toFIG. 43, theend882 of thefitment874 has a width W that is greater than a height H of the fitment, W and H being measured along perpendicular major andminor axes884,886 (each axis shown in phantom), respectively (i.e., a height to width aspect ratio of thefitment874 is less than one, preferably at most about 0.65, such as about 0.55).
• The pouch including fitment is constructed such that the volume of the pouch body increases from an original, unfilled volume as the pouch is filled with content, the volume decreasing as the pouch is emptied. When the pouch is substantially emptied, such as at least about 95 percent empty, the volume of the pouch is substantially equivalent to the original, unfilled volume (e.g., the volume is within at least about 40 percent of the original, unfilled volume, preferably at least about 20 percent of the original unfilled volume, such as at least about 10 percent of the original unfilled volume), withshoulders888 and890 of the pouch collapsed substantially flat. This construction can allow the pouch to be emptied without significant material fatigue, e.g., allowing the pouch to be refilled and reused, and can facilitate use of stiffer materials for forming the sidewalls.
• Pouches850 and900 can have a laminate structure that includes inner and outer layers that form thesidewalls852,854, or the sidewalls can be of unitary structure having only a single layer. In embodiments having multiple layers forming the sidewalls, the layers can be of differing materials, or each of the layers can be of the same material. To form the pouches850 and900, the pouch body can be formed of a single sheet of plastic film (or multiple sheets e.g., two sheets) of plastic film that is folded in half and sealed on the folded edge and the two open edges. The fitment is then inserted into the open edge and the edge is sealed with the fitment disposed between the two sidewalls. In some embodiments, as noted above, the folded edge may not be sealed. In some embodiments, the pouch body is rounded on one end and a continuous rounded seam seals the rounded end of the pouch body (not shown).
• Suitable materials for forming the pouch body include acrylonitrile co-monomer, acrylonitrile-methyl acrylate copolymer (e.g., BAREX® resin), polyethylene, polypropylene, polyester, fluoropolymers, e.g., PCTFE or CTFE, polyethylene terephthalate or a combination thereof. The fitment can also be formed of any suitable material, such as acrylonitrile-methyl acrylate copolymer (e.g., BAREX® resin). The sidewalls (or at least a layer of the sidewalls) may comprise a laminate structure including an inner layer and an outer layer, the inner layer comprising a material having a flexural modulus of at most about 500,000 psi. In some embodiments, the sidewall (or at least a layer of the sidewall) is between about 25 and 100 microns thick.
• A number of embodiments of the invention have been described. Nevertheless, it will be understood that various modifications may be made without departing from the spirit and scope of the invention. Accordingly, other embodiments are within the scope of the following claims.

Claims (158)

1. An oral care device comprising:

an elongated housing including, at a distal portion of the housing, a head dimensioned to fit within a user's mouth;

a fluid conduit defining at least a portion of a fluid passageway in the housing, the fluid conduit having a compressible region disposed in the housing;

wherein the compressible region of the fluid conduit defines a path that is not semicircular; and

a motorized pumping assembly configured to compress the fluid conduit in the compressible region progressively along at least a portion of the length of the fluid conduit to draw fluid into the compressible region and to transfer fluid out of the compressible region along the fluid passageway toward an outlet at the distal portion of the housing.

2. The oral care device ofclaim 1, wherein the pumping assembly is configured to compress the conduit progressively with a series of multiple discrete compression events.

3. The oral care device ofclaim 1, wherein the conduit has a substantially constant compressed volume (V_c) in the compressible region while the conduit is compressed in the compressible region progressively along at least a portion of its length.

4. The oral care device ofclaim 1, wherein the pumping assembly further comprises a rotatable shaft that includes a raised spiral.

5. The oral care device ofclaim 4, wherein the spiral is continuous.

6. The oral care device ofclaim 4, wherein the spiral comprises a discontinuous arrangement of protrusions extending outwardly from a surface of the rotatable shaft.

7. The oral care device ofclaim 4, wherein the spiral is configured to compress the conduit in the compressible region progressively along at least a portion of the length of the conduit as the shaft rotates.

8. The oral care device ofclaim 4, wherein the pumping assembly further comprises a compression element positioned between the shaft and the conduit such that the compression element is displaced by the shaft to compress the conduit in the compressible region when the shaft is rotated.

9. The oral care device ofclaim 8, wherein the compression element is capable of being displaced by the shaft when the shaft is rotated to multiple angular positions.

10. The oral care device ofclaim 8, wherein the compression element is displaced in a direction substantially transverse to the fluid path.

11. The oral care device ofclaim 8, wherein the compression element is displaced linearly when the shaft is at a selected angular position.

12. The oral care device ofclaim 8, wherein the compression element is displaced in a rotational motion.

13. The oral care device ofclaim 8, wherein the compression element is displaced in a bending motion.

14. The oral care device ofclaim 8, wherein the compression element is displaced by buckling the compression element.

15. The oral care device ofclaim 8 comprising multiple compression elements positioned between the shaft and the conduit such that the compression elements are capable of being displaced by the shaft when the shaft is rotated.

16. The oral care device ofclaim 15, wherein the compression elements are arranged in a linear array.

17. The oral care device ofclaim 15, wherein the compression elements are arranged in multiple linear arrays.

18. The oral care device ofclaim 15, wherein the compression elements are displaced sequentially by the spiral of the shaft to compress the conduit in the compressible region to transfer fluid along the fluid path.

19. The oral care device ofclaim 15, wherein the compression elements are arranged to compress the conduit in a series of compression events applied sequentially along the length of the conduit.

20. The oral care device ofclaim 15 comprising a flexible membrane positioned between the rotatable shaft and the conduit, the compression elements being integral with the flexible membrane.

21. The oral care device ofclaim 20, wherein the compression elements extend outwardly from the flexible membrane.

22. The oral care device ofclaim 15 comprising a flexible membrane positioned between the compression elements and the conduit.

23. The oral care device ofclaim 8, wherein the compression element includes a secured end that is connected to a support member and a free end forming a finger, the free end being positioned between the shaft and the conduit such that the free end is capable of being displaced by the shaft when the shaft is rotated to a selected angular position.

24. The oral care device ofclaim 23 comprising multiple compression elements, each including a secured end connected to a support member and a free end to form an array of fingers, the free ends being positioned between the shaft and the conduit such that the free ends are capable of being displaced by the shaft when the shaft is rotated.

25. The oral care device ofclaim 24, wherein the secured ends of the array of fingers are interconnected.

26. The oral care device ofclaim 23, wherein a flexible membrane is positioned between the free end of the finger and the conduit.

27. The oral care device ofclaim 8 wherein the compression element has a pair of ends that are secured to a support member, the compression element being configured to buckle between the secured ends when the shaft is rotated to compress the conduit in the compressible region.

28. The oral care device ofclaim 4, wherein the pumping assembly comprises an electric motor configured to rotate the rotatable shaft.

29. The oral care device ofclaim 28, wherein the electric motor rotates the rotatable shaft at a selected rate or frequency in response to a signal from a controller located within the housing.

30. The oral care device ofclaim 29, wherein the controller is configured to rotate the rotatable shaft at differing selected rates or frequencies.

31. The oral care device ofclaim 30, wherein the controller is programmed to increase or decrease the rate or frequency at which the motor rotates the rotatable shaft.

32. The oral care device ofclaim 30, wherein the controller increases or decreases the rate or frequency the motor rotates the rotatable shaft in response to input from a user.

33. The oral care device ofclaim 1, wherein the long axis of the fluid conduit is substantially parallel to or coaxial with the long axis of the housing.

34. The oral care device ofclaim 1, wherein the fluid conduit comprises a tube.

35. The oral care device ofclaim 1 further comprising a fluid reservoir located within the housing that is capable of communication with the fluid path.

36. The oral care device ofclaim 35, wherein the pumping assembly is located downstream of the fluid reservoir.

37. The oral care device ofclaim 1 comprising multiple fluid conduits disposed within the housing, each fluid conduit defining a fluid passageway.

38. The oral care device ofclaim 37, wherein the fluid conduits each have a compressible region.

39. The oral care device ofclaim 38, wherein the pumping assembly is configured to compress each of the fluid conduits in the compressible region progressively along at least a portion of their lengths to transfer fluid along an associated fluid path toward an outlet at the distal portion of the housing.

40. The oral care device ofclaim 37, wherein the multiple fluid passageways converge within the housing to combine fluid upstream of the outlet.

41. The oral care device ofclaim 37 comprising multiple fluid outlets, each fluid outlet fluidly connected to an associated fluid conduit.

42. The oral care device ofclaim 1, wherein the head is movable with respect to the housing.

43. The oral care device ofclaim 42, wherein the head includes a movable portion that is movable with respect to the housing and a fixed portion.

44. The oral care device ofclaim 43, wherein at least one of the movable portion and the fixed portion includes an array of bristles extending outwardly from a base.

45. The oral care device ofclaim 43, wherein the outlet is positioned in the fixed portion.

46. The oral care device ofclaim 43, wherein the outlet is positioned in the movable portion.

47. The oral care device ofclaim 43, wherein the outlet is positioned between the movable and static portions.

48. The oral care device ofclaim 1, wherein the head comprises a brush.

49. The oral care device ofclaim 1 or48, wherein the head comprises an elastomeric cup.

50. The oral care device ofclaim 49, wherein the elastomeric cup extends outwardly from a base and around at least a portion of the fluid outlet.

51. The oral care device ofclaim 1, wherein the head comprises a pick.

52. The oral care device ofclaim 1 in the form of a dispensing toothbrush.

53. The oral care device ofclaim 1 comprising a replaceable cartridge component.

54. The oral care device ofclaim 53, wherein the replaceable cartridge component includes at least a portion of the fluid conduit.

55. The oral care device ofclaim 1 or53 comprising a separable body component.

56. The oral care device ofclaim 55, wherein the separable body component includes the motorized pumping assembly.

57. The oral care device ofclaim 1 or53 having a replaceable head component.

58. The oral care device ofclaim 57, wherein the head component includes the head, neck and fluid outlet.

59. The oral care device ofclaim 1 comprising an inlet fluidly connected to the fluid conduit, the inlet configured to fluidly connect with a docking station to allow fluid to be introduced through the inlet.

60. The oral care device ofclaim 1, wherein all of the fluid passageway is replaceable.

61. The oral care device ofclaim 60 comprising an inlet in fluid communication with the fluid conduit.

62. The oral care device ofclaim 61, wherein the inlet comprises a valve.

63. The oral care device ofclaim 60 comprising first and second components, each component forming at least a portion of the housing and including a portion of the fluid passageway.

64. The oral care device ofclaim 63, wherein respective fluid passageways of the first and second components are fluidly connected by a valve.

65. The oral care device ofclaim 64, wherein one of the first and second components is a replaceable cartridge component and the other of the first and second components is a replaceable head and neck component.

66. An oral care device comprising:

a housing including a fluid passageway for directing fluid within the housing and, at a distal portion of the housing, a head dimensioned to fit within a user's mouth; and

a reversible pumping assembly configured to transfer fluid along the passageway.

67. The oral care device ofclaim 66 comprising a fluid conduit defining the fluid passageway.

68. The oral care device ofclaim 67 wherein the pumping assembly is configured to compress the fluid conduit in a compressible region progressively along at least a portion of the length of the fluid conduit to draw fluid into the compressible region and to transfer fluid out of the compressible region along the fluid passageway toward an outlet at the distal portion of the housing.

69. The oral care device ofclaim 68, wherein the pumping assembly further comprises a rotatable shaft that includes a raised spiral.

70. The oral care device ofclaim 69, wherein the spiral is configured to compress the conduit in the compressible region progressively along at least a portion of the length of the conduit as the shaft rotates.

71. The oral care device ofclaim 69, wherein the pumping assembly further comprises a compression element positioned between the shaft and the conduit such that the compression element is displaced by the shaft to compress the conduit in the compressible region progressively along at least a portion of the length of the fluid conduit as the shaft rotates.

72. The oral care device ofclaim 71 comprising multiple compression elements positioned between the shaft and the conduit such that the compression elements are capable of being displaced by the shaft as the shaft rotates.

73. The oral care device ofclaim 72, wherein the compression elements are displaced sequentially by the spiral of the shaft to compress the conduit in the compressible region progressively along at least a portion of the length of the fluid conduit to transfer fluid along the fluid path.

74. The oral care device ofclaim 68, wherein the pumping assembly is configured to compress the conduit progressively with a series of multiple compression events.

75. The oral care device ofclaim 68, wherein the reversible pumping assembly is configured to transfer fluid along the fluid passageway in a direction away from the outlet at the distal portion of the housing.

76. The oral care device ofclaim 66, wherein the reversible pumping assembly includes an electric motor.

77. The oral care device ofclaim 76 wherein the electric motor rotates a rotatable shaft in either a first direction or in an opposite second direction in response to a signal from a controller located within the housing.

78. The oral care device ofclaim 66 further comprising a fluid reservoir within the housing and fluidly connected to the fluid passageway.

79. The oral care device ofclaim 78, wherein the reversible pumping assembly is configured to introduce fluid into the fluid reservoir.

80. The oral care device ofclaim 79, wherein the reversible pumping assembly is configured to introduce fluid from the fluid passageway into the fluid reservoir while running in reverse.

81. An oral care device comprising:

a housing including a head, a handle and a neck connecting the head and the handle, the head being dimensioned to fit within a user's mouth; and

an energy source for powering the oral care device;

wherein the housing comprises a separable cartridge component that includes a fluid reservoir and the energy source.

82. The oral care device ofclaim 81, wherein the energy source comprises a battery.

83. The oral care device ofclaim 82, wherein the battery is rechargeable.

84. The oral care device ofclaim 82, wherein the battery is disposable.

85. The oral care device ofclaim 81, wherein the energy source is electrically connected to a motor configured to drive a pump assembly.

86. The oral care device ofclaim 85, wherein the pump assembly is configured to transfer fluid along a fluid passageway toward an outlet located at the head at the distal end of the housing.

87. The oral care device ofclaim 85, wherein the pump assembly is configured to compress a fluid conduit in a compressible region progressively along at least a portion of its length to transfer fluid along a fluid passageway.

88. The oral care device ofclaim 85, wherein the pump assembly comprises a rotatable shaft that includes a raised spiral.

89. The oral care device ofclaim 88, wherein the pump assembly comprises a fluid conduit having a compressible region and defining at least a portion of the fluid passageway, and the pumping assembly comprising a compression element positioned between the shaft and the conduit such that the compression element is displaced by the shaft to compress the conduit in the compressible region as the shaft rotates.

90. The oral care device ofclaim 89 comprising multiple compression elements positioned between the shaft and the fluid conduit such that the compressible elements are sequentially displaced by the shaft as the shaft rotates to progressively compress the fluid conduit in the compressible region.

91. An oral care device comprising:

a housing having a movable head configured to rotate about an axis of rotation, a handle and a neck connecting the head and the handle, the housing defining a housing axis extending between the handle and the head that is perpendicular to the axis of rotation;

a fluid passageway located within the neck of the housing and extending to an outlet at the head; and

a drive member connected to the head at a location spaced from the housing axis, the drive member being configured to rotate the movable head about the axis of rotation.

92. The oral care device ofclaim 91, wherein at least a portion of the fluid passageway extends substantially parallel to the axis of rotation.

93. The oral care device ofclaim 91, wherein at least a portion of the fluid passageway co-extends with the axis of rotation.

94. The oral care device ofclaim 91, wherein the outlet and the axis of rotation are spaced-apart from each other.

95. The oral care device ofclaim 91 comprising a drive assembly configured to move the drive member.

96. The oral care device ofclaim 95, wherein the drive assembly includes an electric motor.

97. The oral care device ofclaim 95, wherein the drive assembly includes a cam comprising a track and a follower connected to the track, and the drive member.

98. The oral care device ofclaim 97, wherein the track extends outwardly from an outer surface of a shaft.

99. The oral care device ofclaim 97, wherein the track is defined by an internal surface of a cup.

100. The oral care device ofclaim 91, wherein the head includes a static portion and a movable portion.

101. The oral care device ofclaim 100, wherein the head includes an array of bristles extending from a base at the static portion.

102. The oral care device ofclaim 100, wherein the head includes an array of bristles extending from a base at the movable portion.

103. The oral care device ofclaim 100, wherein the outlet is located at the movable portion.

104. The oral care device ofclaim 100, wherein the outlet is located at the static portion.

105. The oral care device ofclaim 100, wherein the outlet is located between the movable and static portions.

106. The oral care device ofclaim 91 comprising multiple fluid outlets located at the head.

107. The oral care device ofclaim 91, wherein the drive member is connected to the head at a location spaced a distance (d) between about 0.05 and about 0.2 inch from the housing axis.

108. The oral care device ofclaim 107, wherein d is between about 0.075 and 0.150 inch.

109. The oral care device ofclaim 107, wherein d is about 0.125 inch.

110. A method of providing oral care using an oral care device, the method comprising:

reducing an uncompressed volume (V₀) of a fluid conduit positioned within the oral care device by compressing the fluid conduit to a compressed volume (V_c) within a compressible region defining a path that is not semicircular;

wherein the compressed volume (V_c) remains substantially constant as the fluid conduit is compressed progressively along a length (L) to transfer fluid along a fluid passageway within the oral care device.

111. The method ofclaim 110, wherein the fluid conduit is compressed progressively along L by a series of discrete compression events.

112. The method ofclaim 110, wherein the reducing step includes displacing a compression element.

113. The method ofclaim 112, wherein the compression element is displaced by a shaft having a raised spiral.

114. The method ofclaim 113 further comprising rotating the shaft.

115. The method ofclaim 114, wherein the shaft is rotated by an electric motor.

116. A method of providing oral care using an oral care device, the method comprising:

with a series of successive, side-by-side compression events, compressing a fluid conduit progressively in a compressible region along at least a portion of a length of the fluid conduit to draw fluid into the compressible region and to transfer fluid out of the compressible region along a fluid passageway and toward a fluid outlet at a head of the oral care device.

117. An oral care device comprising:

a housing including, at a distal portion of the housing, a head dimensioned to fit within a user's mouth;

a fluid conduit defining at least a portion of a fluid passageway in the housing;

a pouch disposed within the housing, the pouch comprising a pouch body including two sidewalls defining a volume therebetween, the sidewalls being joined along at least one longitudinal side edge by a seam; and

a fitment providing communication between the pouch body and the fluid conduit.

118. The oral care device ofclaim 117, wherein the sidewalls comprise acrylonitrile co-monomer, polyethylene, polypropylene, polyester, fluoropolymers, polyethylene terephthalate or a combination thereof.

119. The oral care device ofclaim 117, wherein the sidewalls comprise acrylonitrile-methyl acrylate copolymer.

120. The oral care device ofclaim 119, wherein the fitment comprises acrylonitrile-methyl acrylate copolymer.

121. The oral care device ofclaim 117, wherein the pouch body has a shoulder configured to be collapsed substantially flat.

122. The oral care device ofclaim 117, wherein the fitment is attached to the sidewalls at an edge of the pouch body.

123. The oral care device ofclaim 117, wherein the fitment is attached at a face of the pouch body, the fitment extending through an opening defined by the associated sidewall.

124. The oral care device ofclaim 117, wherein the sidewalls comprise a laminate structure including an inner layer and an outer layer, wherein the inner layer comprises a material having a flexural modulus of at most about 500,000 psi.

125. The oral care device ofclaim 117, wherein the sidewalls comprise a film between about 25 and 100 microns thick.

126. The oral care device ofclaim 117, wherein the sidewalls are joined along two, opposite longitudinal side edges by respective seams.

127. The oral care device ofclaim 117, wherein the sidewalls are joined at a longitudinal side edge by a fold.

128. An oral care device comprising:

a housing including, at a distal portion of the housing, a head dimensioned to fit within a user's mouth;

a fluid conduit defining at least a portion of a fluid passageway in the housing;

a pouch disposed within the housing, the pouch comprising a pouch body including two sidewalls defining a volume therebetween; and

a fitment providing communication between the pouch body and the fluid conduit;

wherein the fitment has a height to width aspect ratio of less than one, the height and width being measured along minor and major axes, respectively, at an end of the fitment disposed between the sidewalls.

129. The oral care device ofclaim 128, wherein the height to width aspect ratio is at most about 0.65.

130. The oral care device ofclaim 128, wherein the sidewalls are joined along at least one edge by a seam.

131. The oral care device ofclaim 128, wherein the sidewalls are joined along two, opposite longitudinal side edges by respective seams.

132. The oral care device ofclaim 128, wherein the sidewalls are joined along at least one side edge by a fold.

133. The oral care device ofclaim 128, wherein the sidewalls comprise acrylonitrile co-monomer, polyethylene, polypropylene, polyester, fluoropolymers, polyethylene terephthalate or a combination thereof.

134. The oral care device ofclaim 128, wherein the sidewalls comprise acrylonitrile-methyl acrylate copolymer.

135. The oral care device ofclaim 134, wherein the fitment comprises acrylonitrile-methyl acrylate copolymer.

136. The oral care device ofclaim 128, wherein the pouch body has a shoulder configured to be collapsed substantially flat.

137. The oral care device ofclaim 128, wherein the fitment is attached to the sidewalls at an edge of the pouch body.

138. The oral care device ofclaim 128, wherein the fitment is attached at a face of the pouch body, the fitment extending through an opening defined by the associated sidewall.

139. The oral care device ofclaim 128, wherein the sidewalls comprise a laminate structure including an inner layer and an outer layer, wherein the inner layer comprising a material having a flexural modulus of at most about 500,000 psi.

140. The oral care device ofclaim 128, wherein the sidewalls comprise a film between about 25 and 100 microns thick.

141. An oral care device comprising:

a housing including, at a distal portion of the housing, a head dimensioned to fit within a user's mouth;

a fluid conduit defining at least a portion of a fluid passageway in the housing;

a pouch disposed within the housing, the pouch comprising a pouch body including two sidewalls defining a volume therebetween; and

a fitment providing communication between the pouch body and the fluid conduit;

wherein the volume increases from an original, unfilled volume as the pouch is filled with content.

142. The oral care device ofclaim 141, wherein the volume decreases as the pouch is emptied.

143. The oral care device ofclaim 141, wherein, when substantially emptied, the volume is substantially equivalent to the original, unfilled volume.

144. The oral care device ofclaim 141, wherein the fitment has a height to width aspect ratio of less than one, the height and width being measured along minor and major axes, respectively, at an end of the fitment disposed between the sidewalls.

145. The oral care device ofclaim 144, wherein the height to width aspect ratio is at most about 0.65.

146. The oral care device ofclaim 141, wherein the sidewalls are joined along at least one edge by a seam.

147. The oral care device ofclaim 141, wherein the sidewalls are joined along two opposite longitudinal side edges by respective seams.

148. The oral care device ofclaim 141, wherein the sidewalls are joined along at least one side edge by a fold.

149. The oral care device ofclaim 141, wherein the sidewalls comprise acrylonitrile co-monomer, polyethylene, polypropylene, polyester, fluoropolymers, polyethylene terephthalate or a combination thereof.

150. The oral care device ofclaim 141, wherein the sidewalls comprise acrylonitrile-methyl acrylate copolymer.

151. The oral care device ofclaim 150, wherein the fitment comprises acrylonitrile-methyl acrylate copolymer.

152. The oral care device ofclaim 141, wherein the pouch body has a shoulder configured to be collapsed substantially flat.

153. The oral care device ofclaim 141, wherein the fitment is attached to the sidewalls at an edge of the pouch body.

154. The oral care device ofclaim 141, wherein the fitment is attached at a face of the pouch body, the fitment extending through an opening defined by the associated sidewall.

155. The oral care device ofclaim 141, wherein the sidewalls comprise a laminate structure including an inner layer and an outer layer, wherein the inner layer comprising a material having a flexural modulus of at most about 500,000 psi.

156. The oral care device ofclaim 141, wherein the sidewalls comprise a film between about 25 and 100 microns thick.

157. An oral care device comprising:

an elongated housing including, at a distal portion of the housing, a head dimensioned to fit within a user's mouth;

a fluid conduit defining at least a portion of a fluid passageway in the housing, the fluid conduit having a compressible region disposed in the housing; and

a motorized pumping assembly configured to compress the fluid conduit in the compressible region progressively along at least a portion of the length of the fluid conduit to draw fluid into the compressible region and to transfer fluid out of the compressible region along the fluid passageway toward an outlet at the distal portion of the housing;

wherein the pumping assembly is configured to compress the conduit progressively with a series of multiple discrete compression events.

158. An oral care device comprising:

an elongated housing including, at a distal portion of the housing, a head dimensioned to fit within a user's mouth;

a fluid conduit defining at least a portion of a fluid passageway in the housing, the fluid conduit having a compressible region disposed in the housing; and

a motorized pumping assembly configured to compress the fluid conduit in the compressible region progressively along at least a portion of the length of the fluid conduit to draw fluid into the compressible region and to transfer fluid out of the compressible region along the fluid passageway toward an outlet at the distal portion of the housing, the motorized pumping assembly including a drive shaft that is disposed substantially parallel to a plane defined by the compressible region.

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