DISTRIBUTOR PUMP FOR STORAGE CONTAINER AND DISTRIBUTION OF PRODUCT AND RECIPIENT PROVIDED OF A PUMPOF THIS TYPEDESCRIPTION OF THE INVENTION The present invention relates to a distributor pump intended to be mounted on a product storage and distribution container, for distributing a product that is there, stored. More particularly, the invention relates to a pump of this type in which the distribution of products is effected by deforming a variable volume pumping chamber, manually or by means of a driving member. Such pumps are already known in the state of the art. It is known in this way from EP-B-0 900 598, a pump for a fluid cosmetic product, which includes an elastically deformable pumping chamber under the action of a push button and which is associated with a product intake valve , whose valve communicates with a container on which the pump is mounted, and a product distribution valve through which the product is distributed at the outlet of the pump. According to the pump described in this document, the actuation of the push button is carried out according to a general co-axial direction to the container, which limitsREF. : 196070to a large extent the possibilities of using the pump. In addition, this pump includes a relatively high number of parts, which affects its manufacturing cost, as well as the preservation of the environment. It is also known from EP-A-1 243216, a distribution pump for the distribution of a shampoo that includes, mounted on a cylindrical support this same fixed on the neck of a container, a dip tube, a pump chamber and an axially operating distribution member. The valves are provided on the one hand and on the other side of the distribution chamber. As indicated above, according to the arrangement described in this document, the actuation is carried out according to a direction coaxial to the tube. In addition, the pump also includes a relatively large number of parts, which makes its manufacture relatively expensive. On the other hand, according to this arrangement, the pumping chamber is made in the form of a bellows, which requires its realization separately from that of the immersion tube and the actuator. Furthermore, the use of a bellows does not effectively control the deformation suffered by the pumping chamber after the actuation, which causes poor control of the distributed dose and poor repetitiveness of the distributed doses. The use of a bellows presents increased problemsof reliability, in particular when a large-diameter pumping chamber is used, the bellows is liable to rupture in the long run. In order to increase ergonomics, it has been proposed to make the pumping chamber so as to make it radially deformable, either manually, or under the action of a trigger lever equipped with a command arm which, in operation, it comes to bear laterally on the deformable wall of the pumping chamber. In this regard, reference can be made to document FR 2 141 309 which describes such an arrangement. However, the pump described in this document still includes a relatively large number of parts, which makes its manufacturing cost relatively high. It has even been proposed to make the pumping chamber in the form of a flexible tube which can be extended into the tank to form a dip tube. The documents FR 1 508 161; GB-A-2 182 726; US 4,631,008; US 3,066,832; US 3,881,641 and FR 2 389 105 provide indications for the realization of such pumps. The pumps described in these documents are operated by means of a firing lever, which generally requires distributing the product in a single position, either upside down or face up.
In any case, the tube used to make the pumping chamber is devoid of a flap, so that if the pump is not used for a prolonged period the product runs the risk of being altered and the pump clogged, especially if the product is viscous. On the other hand, in numerous solutions known from the state of the art, the doses that can be distributed are relatively small. Finally, reference could be made to document FR 2 341 518 which describes still another type of distributor pump that includes a dip tube that is inserted into a container that includes, internally, two valves that delimit a pumping chamber and a driving member of the pumping chamber to get to deform it radially. However, the dip tube is here prepared in two parts and includes, in particular, at the level of the pumping chamber, a flexible inner tube and a covering member of this tube. This covering member includes a rigid outer tube, or liner, fixed on the neck of the container, the actuator includes a tail which is inserted between the elastically deformable tube and the rigid tube, and which requests a part of the immersion tube located inside the volume of the container. Consequently, the dip tube includes a relatively complex structure where the assembly isHardly compatible with high manufacturing rates. In addition, the coating member made of metallic material, in contact with the product, can be the source of unwanted interactions with the product, and in particular can engender physicochemical modifications of the product, such as a coloration of the product. In view of the foregoing, there is thus a need for the use of a pump that remedies all or part of the aforementioned drawbacks and, mainly that it is at once attractive in the aesthetic, ergonomic and relatively simple to manufacture, and this at a low cost. The invention therefore has as its objective, according to one of its aspects, a distribution pump intended to be mounted on a storage and product distribution container, which includes: a variable volume pumping chamber and a dip tube that includes a first end adapted to be inserted in the container to take the product, and a second end of product distribution in the outlet of the pumping chamber. According to a general characteristic of this pump, the dip tube includes two valves and comprises at least one elastically deformable portion extendingbetween the valves and that delimits the pumping chamber. The invention thus allows, by virtue of the embodiment of the pumping chamber in the form of an elastically deformable portion of an immersion tube delimited by two product intake valves in the chamber and product distribution, to make a pump from a very small number of parts and therefore at low cost, and that allows proposing several modes of operation, always reducing the risks of alteration of the product. In particular, a pump of this type can be manufactured from a single type of material, thus presenting an interest from a point of view of recycling of the parts put into operation. In addition, the tube is, according to another feature of the invention, made by extrusion. The manufacturing and assembly of the pump, and in particular the embodiment of the dip tube, is considerably simplified. Consequently, advantageously, the elastically deformable portion and the dip tube are produced in a monobloc manner. Advantageously, the first end includes a retracting end zone relatively to a free end of the tube. It is also possible to extend the immersion tubeto the bottom of the container, even in contact with the bottom to take the product, without the free end of the dip tube being blocked by the bottom wall. In this way, one embodiment, the first end of the tube includes a neckline. For example, the first free end of the tube includes at least one window of mainly triangular, square or rectangular section. In a variant, the first free end of the tube is beveled or is generally corrugated. According to a preferred embodiment and that does not generate waste, this first end of the tube is trimmed in a facilitated manner according to a linear and sequential process. The chosen shape allows a part of the dip tube to be in contact with the bottom of the container, always allowing a collection of the product contained in this container. According to another characteristic of the pump according to the invention, at least one of the valves is added to the tube and is maintained in said tube by friction, pressure or assembly. It will be noted that, for example, the tube has at rest a cross section of constant dimension. Advantageously, the section of the tube has a dimension, mainly a diameter, comprised between 3 mmand 15 mm, preferably between 8 tnm and 12 mm, and in particular about 10 mm. The tube can also be advantageously taken, depending on the case, directly with the neck of the container. In other words, the external wall of the tube may be in engagement with the internal wall defined by the mouth of the container. In different embodiments, at least one of the valves is formed by an element chosen from a ball valve, a disk valve, a window valve, a leaf valve moving in translation, a leaf valve mounted pivoting, and a needle valve. According to yet another feature of the invention, the second end of the tube includes a self-adhesive peripheral wall, adapted to open under the effect of an over-pressure caused at the moment of deformation of the pumping chamber. In an exemplary embodiment, the pump further includes a product applicator mounted on the second end of the tube. This can still include a pump driving member, adapted to deform the pumping chamber. The actuating member can be adapted to create a depression within the tube. This can be placed between a distribution valve and a mouth of thecontainer having a mounting opening for the tube. More generally, the actuating member may extend between the opening and the dispensing head. This actuating member can be removably mounted, depending on the case, in order to be interchangeable. This actuating element can thus be provided on an external part of the tube forming a protrusion outside the container. In other words, this organ can extend outside the interior volume defined by the container and this eventually exclusively. The mouth may eventually form the drive surface itself, for example serving the user of the loading surface to deform the tube section, mainly by folding or bending. This external part may even be large enough to allow a digital drive of the user in the same tube, such as by compression of the tube. The distribution valve can also be provided on the outside of the dip tube, or forming a protrusion outside the container. The intake valve can, by itself, be inscribed in the internal volume of the container. In a variant, the intake valve can also be provided outside this volume. For example, the actuator includes a pressure clamp.
This may even include a leg adapted to allow torsion of the tube. The actuator may even include a pipe extension member. For example, the actuating member includes a firing lever provided with a first manually operable end area, and a second end area opposite the first zone, relatively a pivot axis of the firing lever, and fastened to the tube . The invention also aims, according to another aspect, a container for storage and distribution of a product, comprising a tank for the storage of said product. This container further includes a pump as defined above. According to another characteristic of the container, the first end of the immersion tube extends in the tank to the vicinity of a bottom of the tank, even in contact with the bottom. In one embodiment, the reservoir includes a flexible bag, on which the pump is mounted. The container further includes a rigid outer shell surrounding the reservoir. In another embodiment, the reservoir is made of rigid material, the pump comprising a passage of air intake.
The invention also has as its objective a method for distributing a product by means of a pump as defined above, this method comprises the following steps: - deformation of the immersion tube by localized reduction of the section of the tube, at least in one case area between the valves; the recovery of a dose of the product; and the filling of the pumping chamber by relaxation of the tube. In one embodiment, in the course of the deformation of the tube, the tube is deformed by bending. It is also possible to deform the tube by compression. The tube can even be deformed by lengthening the tube. In a variant, the tube can be deformed by twisting. The invention also aims at a distribution pump intended to be mounted on a storage container and product distribution, which includes: a variable volume pumping chamber, and a dip tube including a first end adapted to be inserted in the container fortake the product, and a second end of distribution of the product at the outlet of the pump chamber, in which the immersion tube defines an axis of elongation and which has a cross section at rest of appreciably constant dimension, the tube includes two valves, at least one elastically deformable portion that extends between the valves delimiting the pumping chamber. A tube of this type could then be processed preferably by extrusion, or otherwise by rotomolding or injection molding. The invention also has as an objective a dispenser pump intended to be mounted on a product storage and distribution container, which includes: a variable volume pumping chamber, and - a dip tube including a first end adapted to be inserted in the container for taking the product, and a second end of product distribution at the outlet of the pumping chamber, in which the tube includes two valves, at least one elastically deformable portion extending between the valves delimiting the chamber pumping, and in which this tube includes an external part, to the container, manually operated by the user by digital support directly to the contact of the portion or by means of an actuating member of the product distributioncarried around this external part. The object of the invention is also to provide a distribution pump intended to be mounted on a product storage and distribution container, comprising: a variable-volume pumping chamber, and a dip tube including a first end adapted to be inserted in the container, to take the product and a second end of product distribution, at the outlet of the pumping chamber, in which the tube includes two valves, at least one elastically deformable portion that extends between the valves that delimit the pumping chamber, the pump includes the means of torsion of the tube acting as the actuation organ for the distribution of the product. Other objectives, features and advantages of the invention will appear after reading the following description, given only by way of example, not limiting, and made with reference to the attached figures in which: - Figure 1 is a perspective view of a product storage and distribution container equipped with an embodiment of a pump according to the invention; Figure 2 is a schematic of the principle illustrating the operation of the pump of Figure 1;Figure 3 illustrates a first variant of the pump of Figure 1; Figure 4 illustrates a second variant of the pump of Figure 1; Figure 5 illustrates the operating principle of the pump of Figure 4; Figure 6 shows a third variant of the pump of Figure 1; Figure 7 illustrates the operating principle of the pump of Figure 6; Figure 8 is a schematic of the principle illustrating yet another embodiment of using a pump according to the invention; Figure 9 is a perspective view of a fourth variant of a pump according to the invention, which puts into operation the principle illustrated in Figure 8; Figures 10 to 19 illustrate various embodiments of the valves that go into the constitution of a pump according to the invention; Figures 20 to 22 schematically illustrate various embodiments of the free end of the dip tube; and Figure 23 illustrates an embodiment of starting a pump according to the invention. Figure 1 is represented, in a wayschematic and perspective, a product distribution storage container 1 provided with a pump 2 according to the invention. In the position illustrated in Figure 1, the assembly includes a general axis X-X 'represented in a supposedly vertical position. In the illustrated embodiment, the container 1 includes a reservoir provided with a closed lower end 3, and an open upper end 4 forming the neck, on which the pump 2 is mounted, for example, by means of screwing. The container is for example intended to contain a cosmetic or cleaning product. By cosmetic product is meant a product as defined in Council Directive 93/35 / EEC of June 14, 1993. However, it does not fall outside the scope of the present invention when any other fluid, liquid or viscous product is present. contained in the container 1 and distributed by the pump 2. As seen in figure 1, the pump 2 is essentially constituted by an immersion tube 5 which includes a lower end 6 by which the product contained in the container 1 is introduced in the tube 5, and extending in the container in the direction of the closed bottom end 3 of the container 1, mainly incontact with the bottom wall 7 of the container and an upper opposite end 8 extending outside the container and through which the product is distributed at the outlet of the pump. The tube 5 advantageously has at rest a cross section of constant dimension. This section is advantageously circular but could also be polygonal, mainly square or oval. This section can have a dimension and mainly a diameter between 3 mm and 15 mm, more preferably between 8 and 12 mm and in particular about 10 mm. The lower end 6 of the dip tube may extend in contact or at most 10 mm from the bottom wall of the container. The tube 5 can be mounted on the container by means of a fixing member. This function organ may comprise a sleeve for putting a ratchet, for screwing, for setting or for assembling by tight fitting on the neck of the container. For example, in the middle part, the tube 5 is provided with a threaded sleeve B, mounted by screwing on the neck of the container and which ensures a maintenance of the tube 5, for example, by friction. The container may even be provided with a cap (not shown) covering the upper end of the tube.
With reference also to Figure 2, the operation of the pump is essentially based on the deformation of a pump head formed by a portion 9 of the manually accessible tube 5 which thus extends outwards from the container 1. In this way, the dip tube 5 is at least partly made of elastically deformable material, mainly the portion 9. For example, for a tube with an internal diameter of 10 mm and an outer diameter of 14 mm, the tube's stiffness constant, axially measured by means of a texturometer, it is 4000 N / m, and advantageously comprises between 3000 N / m and 6000 N / m, to ensure a comfortable and efficient operation of the pump. The tube 5 and the portion 9 are made in a single block. Advantageously, the tube 5 is produced in one piece by extrusion of a flexible plastic material. In a variant, this tube could also be made by molding such as retromolding or injection. However, the embodiment by extrusion of the tube is also advantageous in the measurement where it allows to produce a tube of great length, for example, of length greater than three cm, mainly of length greater than eight cm and, more particularly, a longer length to twelve cm, and this witha constant diameter. The tube 5 is also advantageously single-walled, that is to say it is devoid of lining or external wall. Preferably, all the constituents of the pump are made of the same type of material such as one or more plastic materials. In the exemplary embodiment illustrated in FIGS. 1 and 2, the deformation is effected by manually grasping the tube 5, in the portion 9 that forms the pump body, and in particular, pressing it between two fingers D, for example, between the thumb and forefinger, in order to exert an effort following a radially internal direction (arrow Fl). As shown in Figure 2, which illustrates the principle of operation of the pump, the manually operable zone 9 is delimited by a low valve, with the reference number 10, and by a high valve, reference 11, placed a front another way to work in the same direction. It will be noted in this regard that thanks to the realization of a single monoblock of the tube, and in particular thanks to its realization by extrusion, it is possible to make a dip tube that includes an elastically deformable area that delimits a pumping chamber and that also incorporates the seats of the valve S.
In the example shown, the low and high valves are constituted by the valves of the ball type, such as B, in support, in rest position, on a seat S. These are, each one, placed in the outlet tube 5 when an overpressure generated at the moment of a stress, transverse here, is applied on the tube in order to cause a consecutive deformation that generates a localized reduction of the section, one of the valves, namely, the low valve 10 is closed, while the other valve, namely, the valve 11 is opened (arrow F2) and a dose of product distributed through the high valve 11 then to the outlet of the valve. the pump (arrow F3). After the distribution of the product, when the tube 5 is relaxed, the elastically deformable zone 9 returns to its initial position. The consecutive depression causes a closure of the high valve 11, a low valve opening 10 and a consecutive filling of the deformable zone 9 of the dip tube. In other words, the elastically deformable and manually operable zone 9 of the dip tube 5 constitutes a variable volume pumping chamber, delimited axially by the low and high valves, which can be locally compressed to reduce its volume and cause a distribution of a dose of product, the pumping chamber takes, after the relaxation, its initial volumefor the admission of the product, thanks to the elasticity of the constituent wall of the tube. The lower end 6 of the tube 5 is therefore provided upstream of the pumping chamber while the upper end 8 extends downstream of the pumping chamber. The person skilled in the art will thus develop the tube and in particular the pumping chamber from a material capable of being easily deformed manually, always avoiding any untimely actuation of the pump, and capable of returning to its initial position by always sucking the product and this, depending on the nature of the product to be vacuumed. As indicated above, the embodiment of the tube by extrusion is advantageous in that it allows the realization of a tube and in particular of a pumping chamber that allows a better control of the dose of the distributed product. In this regard, a material having a shore hardness less than 45 D and a flexural modulus less than 200 MPa may be chosen. By way of example, the tube 5 can be made of an elastomer, for example, of the SBR or CR elastomers, such as the elastomers sold under the reference Neopren® or Baypren®, of the EPDM or EPM type, such as the commercialized neoprene under the Vistalon® references,Polysar EPM®, Buna EP® or Nordel®, of the FPM or FKM type, such as the elastomers marketed under the commercial references Technoflon®, Fluorel®, Aflas® or Viton® of the MQ type, MVQ, MPQ, FVMQ, or FMQ, such as the elastomers marketed under the commercial references Tygoprene®, Sylopréne®, Sylastic®, FSE®, Sylon®, Elatosil®, or Rhodorsil®, of the EVM type, such as Levapren elastomers, Levamelt®, Baymond L®, or even of type AU or EU. It is also possible to use thermoplastic elastomers, of the TPO or TPV type, such as the elastomers sold under the reference Engage®, Santopréne®, Trefsin®, Sarlink® or Alcryn®, or of the SBC, TPU, PEBA or propylene-based type. ethylene, such as elastomers marketed under the reference Multiflex TPE®, Pebax® or Adflex®. However, flexible thermoplastics, of the EVA or VLDPE type, such as the thermoplastics marketed under the references Evatane®, Greenflex®, Escoréne Ultra® or Clearflex® may also be used. The arrangement that has just been described makes it possible to make a pump essentially constituted by a dip tube provided internally with two low and high valves that delimit a pumping chamber between them, and therefore with a reduced number of pieces, which advantageously affects in its manufacturing cost, but also inthe protection of the environment. Furthermore, thanks to the realization of the pump with a reduced number of pieces, the number of materials of different nature in contact with the fluid to be circulated is minimized. On the other hand, the operation of the pump by manual deformation of the immersion tube allows, as will be described in detail in the following, a great flexibility of use allowing different positions and also allowing a particularly silent operation. In this way, for the same tube, it is possible to deform the pumping chamber in different ways, by lengthening, drilling, friction, etc. It will also be noted that the use, the amount of product distributed depends on the amplitude of the deformation of the tube. In fact, the dose of product distributed by the pump is equal to the variation of the volume generated by the mechanical deformation exerted on the flexible tube. It is thus possible to distribute different doses, from one use to the other, depending on the user's desire and, as the case may be, to distribute large quantities of product. It will even be noted that, while in the example of embodiment described, the tube can be mounted on the container by means of a fixing member, it will also be possible, in a variant, to mount the tube in such a way thatit arrives in direct connection with the internal wall of the neck, in such a way that the neck ensures the maintenance of the tube by friction, in order to obtain a hermetic assembly, the fixing sleeve can then be omitted. Finally, it will be noted that, in order to facilitate the use of the pump, the upper end 8 can be provided with a distribution member. In this regard, as illustrated in FIG. 1, the tube 5 can be provided with a distributor head 12, for example, encased or assembled on the upper end 8 of the tube in order to facilitate the distribution, mainly to increase the precision. In particular, the dispenser head could comprise a conduit of reduced section or it could be provided with a slide provided with a whirl system. Of course, in a variant, other types of applicator or dispensing member may be mounted on the upper end of the tube. The type of porous element, ball or sphere, may be used in this regard. The invention is of course not limited to the described embodiment and other embodiments are illustrated in figures 3 to 23. While in the embodiment made above with reference to figures 1 and 2, the deformation of the tube is done by manually pressing hetube between two fingers D, with reference to figure 3, it is possible to equip the pump head of a pump operating member. But it will be noted that in these various embodiments, the pumping chamber extends at least partly towards the outside of the container. In other words, when it is intended to be manipulated manually, the user can easily place his fingers on the elastically deformable pumping chamber, to manually actuate it. Similarly, when a drive member is used, it is mounted on the outside of the container, in such a way that it can be replaced in the event of malfunction or of changing it if it is desired to change the operating mode of the camera. pumping. In the embodiment shown in this figure, the tube is provided with a gripper P where two arms 13 and 14 locally surround the manually accessible area 9 and can be assembled manually (arrow F4) in order to transversely deform the tube. The clamp P of elastically deformable material adapted to avoid preventing the filling of the pumping chamber can be made. In a variant, the piece can be made of rigid material, non-deformable, and provided with a joint carried in a relaxed resting position, thanks to the flexibility of the tube.
On the other hand, while in the embodiments described above the deformation of the tube is carried out by compression, it is also possible, in a variant, as illustrated in FIGS. 5 and 6, to provide for a deformation of the tube by bending (arrow F5). ). In this embodiment, which does not differ essentially from the embodiments described above by the drive mode of the pump head, from a rest position in which the tube essentially extends along the axis XX 'of the container, It is convenient to simply exert a lateral effort on the free end 8 of the tube, so as to bend it and thus generate a reduction of the localized section, generating a consecutive decrease in the volume of the pumping chamber. The free end of the tube can then be provided with a fixed stop made, for example, in the form of a relief 15, in order to facilitate the actuation of the pump head. But in a variant, the mouth of the container, mainly the inner edge that delimits the opening of this mouth, can form an operating surface of the pumping chamber by folding the tube at this level. According to a third variant, illustrated in figures 6 and 7, the deformation of the pumping chamber iseffect by twisting the tube. This torsion can be obtained by screwing the tube, applying a torsional force on the tube and thus reducing the volume of the pumping chamber. As it is visible in figure 6, it will then be possible to equip the pump head with a leg 16 which makes it easier to apply the torque (arrow F6). Referring now to Figure 8, the deformation of the tube can even be effected by elongation. In other words, when a tensile stress is exerted on the tube, the consecutive deformation causes a reduction of the section longitudinally of the pumping chamber and a distribution of the product through the high valve 11. On the contrary, when it is relaxed the tube, the pumping chamber returns to its initial position (arrow F7), which causes a depressurization in the pumping chamber, a closing of the high valve 11, a low valve opening 11 (arrow F8) and an aspiration of the product through the low valve 10 (arrow F9). With reference to Figure 9, to facilitate the elongation of the tube, it can be provided on the sleeve B an elongation member comprising a firing lever 17 including a first end zone 17a manually operable according to a direction manuallytransverse (arrow FIO), a second area of the end 17b attached to the free end 8 of the tube and a middle part 17c in abutment or articulated on a base 18 integral with the sleeve B. In this embodiment, the distribution is effected in an essentially transverse direction oblique, relative to the general axis XX 'of the tube, the pumping chamber is then configured so as to form an elbow inserted and guided in an additional throat 19 made in the base. For example, in this embodiment, the second free end 17b forms a fork on which rests a collar 20 made in the vicinity of the free end of the tube 5 and, in particular, the face of the collar located on the opposite side of the end of the tube. 5. Of course, by exerting a pressure on the first area of the end 17a, the fork 17b exerts a lateral or generally oblique end on the collar 20, and consequently, causes an elongation of the pumping chamber. This deformation by elongation engenders a decrease in the section of the tube and a distribution of a product dose corresponding to the amplitude of the deformation. After the relaxation, the elasticity of the tube causes, on the one hand, the filling of the pumping chamber and on the other hand, a replact of the release lever in itsinitial position. As indicated above, in the different embodiments described, the pumping chamber is delimited by a low valve 10 and a high valve 11. In the mode visible in figures 1, 2 and 8, the high and low valves are each constituted by a ball valve. In this case, as illustrated in Figure 10, the valve includes a body 22 comprising an external peripheral surface generally cylindrical, and a bottom provided with one or more passages 23 and internally including a receiving housing for a ball or sphere B delimited on one side by the bottom 23 and on the other hand, by an annular seat 24 against which the sphere B rests in the open position of the valve. However, it is also possible to use, instead of a ball valve, a window valve (FIG. 11), a mobile disc valve (FIGS. 12 and 13), in which a disc 25 held by the lateral arms such as 26, elastically deformable, blocks a product dripping orifice, or even a swinging flap valve in translation (FIG. 14), a needle valve (FIG. 15) or even a hinged flap valve (FIG. 16). It will be noted however that in the illustrated modein figures 12 and 13, the valve is made of a flexible material, for example, a flexible elastomer. Although the drawback of creating a bottleneck is present, it is still very simple to perform. In the various embodiments considered, the product intake valve 11 in the chamber can be provided in the internal volume of the container, while the product distribution valve 10 can extend outwards from the container, i.e. beyond of the neck of the container. It will be noted in this regard that, as indicated above, the pumping chamber extends at least partly towards the outside of the container. In another aspect, the dip tube comprises a part that is inserted in the container and that is thus inscribed in the internal volume of the container and extending to the level of the mouth of the container, and an external part of the container, which is protruding out of the container, and out of its mouth. This protruding part can serve as an anchor for the actuating member. At least the inner part may be devoid of the covering sheath or the outer sheath, over at least 50% of its height, preferably over 75% of its height, and preferably over its entire height, such that over its height according to which the tube is intended to beinserted in the tube in contact with the product, the volume reserved for the product in the container can be larger. It is also possible to provide that at least the outer part of the tube is devoid of the covering member The tube may possibly be devoid of the covering member over its entire height, optionally except at the height of a fixing section of a dispensing head. partial or complete absence of the coating member can avoid possible physicochemical modifications of the product contained in the container, mainly when this coating member is made of one or more metallic materials. With reference to FIGS. 17 to 19, as far as the high valve 11 is concerned, the second end 18 of the pumping chamber can even be made in the form of a self-attached peripheral wall, that is, closed in the position of rest (figures 17 and 18). On the contrary, when an overpressure is created in the pumping chamber, this end opens spontaneously in order to drain the fluid. When the pumping chamber is relaxed, the end of the pumping chamber closes spontaneously for the intake of the product in the chamber. In the different embodiments considered in FIGS. 10 to 16, the valves will preferably be made in the form of an elementinserted into the immersion tube 5 and maintained in the latter by friction, pressure or assembly. This modality presents the advantage of reducing costs and increases ease of use. Due to the manufacture of the dip tube from an elastically deformable material, the positioning of the valves takes place thanks to the deformation of the tube, therefore, it must advantageously be provided that the length of the valves is greater than the diameter. In the various embodiments, the immersion tube 5 is preferably carried out so that its free end comes into abutment against the bottom surface 7 of the container 1. In this way, in use the container 1 can be completely emptied, the aspiration of liquid at the bottom of the container is then facilitated. In order to prevent the bottom wall 7 from being sucked up and clogging the lower end 6 of the dip tube, this end will be formed in such a way that it presents a region of the end 27 in retraction relative to the free end 28. example, with reference to figure 20, this retraction zone can be realized in the form of a globally triangular, square or rectangular window. But it is equallypossible in a variant, configure the free end in the form of a bevel (Figure 21) or under the wavy shape (Figure 22). These different forms are regrouped under the common meaning of cleavage. It will finally be noted that the pump system that has just been described can be advantageously used in "airless" (airless) conditioning, that is, conditioning in which the products are stored protected from the air . In this case, as illustrated in Figure 23, the container essentially comprises a flexible bag 29 on which the pump 2 is mounted. The reservoir can even carry an external rigid helmet 30 which serves to mask or protect the flexible bag 29 However, it is also possible to use the pump that has just been described on rigid containers In this case, air intake passages will be provided in the pump, which mainly serve to bring atmospheric pressure into the container before or after filling of the camera. However, the air intake can be obtained by taking advantage of the flexibility of the tube. Finally, it will be noted that the invention is not, of course, limited to the embodiments described or considered. In particular, the embodiments according to which the tube ismade in a monoblock manner by extrusion, the embodiments according to which the tube has at rest a cross section of constant dimension, the embodiments in accordance with which the elastically deformable pumping chamber is accessible from the outside and embodiments according to which the means for actuating the pumping chamber by twisting or deformation in the thread of the tube are used, can be considered independently of each other, and depending on the case, be combined with all other variants previously considered. It is noted that in relation to this date the best method known by the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.