US20020054798A1 - Hand-held tool containing a removably attachable object sensor - Google Patents

Abstract

A hand-held power tool having a housing and a removably attachable portion. The removably attachable portion, which comprises an object sensor to detect studs hidden behind walls, electrical lines, and other materials, is readily accessible to tradesmen. A level may also be included on the removably attachable portion.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS
• This application is a continuation-in-part of U.S. application Ser. No. 09/501,194 filed on Feb. 10, 2000, entitled ACCESSORY TRAY FOR HAND-HELD POWER TOOL which is incorporated by reference herein.[0001]
BACKGROUND OF THE INVENTION
• 1. Field of the Invention[0002]
• The present invention relates to hand-held electric or pneumatic tools having a sensor removably attachable to the tool.[0003]
• 2. Background Art[0004]
• Hand-held tools powered by electricity (corded (AC) or battery pack (DC)) or compressed air, such as drills, reciprocating saws, screwdrivers, and nailers are extensively used by electricians, plumbers, carpenters and others. Common tasks for such devices generally include drilling holes, driving fasteners such as screws, and cutting various materials. Some of these tasks require the use of drill bits and tool bits which are typically stored separately from the hand-held drill.[0005]
• Frequently, building tradesmen are confronted with the task of finding some suitable structure, such as a stud, hidden behind a visible wall surface to securely hold a nail or screw. Various stud sensors have been developed to locate studs using, for example, electromagnetic means to sense a nail located in the stud or by measuring changes in the density of the wall. These sensors can also be used to locate conduit, exhaust vents, rebar, plumbing and other hidden material a tradesman may wish to avoid drilling or cutting into. More importantly, building tradesman have to drill holes or cut materials in the vicinity of “live” electrical lines. Various sensors have been developed to locate electrical wires, especially “live” wires. Further, other types of sensors have been developed to help tradesmen locate and distinguish different materials hidden behind walls. Collectively, these sensors are defined as object sensors.[0006]
• While highly effective, one problem with such object sensors is that they are a separate piece of equipment that the tradesman may lose or merely not carry on him when he needs it. Prior art solutions have been to provide the workers with pouches and the like which can be worn about the workman's waist. While these pouches eliminate the need for the operator to leave the workplace to get the object sensor, the workman must remember to first place the object sensor in the pocket and then search the myriad of pockets to find the object sensor. Thus, a significant savings of time may not be realized.[0007]
• Therefore, there exists a need for a device that combines a hand-held power (AC and/or DC) or pneumatic tool with a removably attachable object sensor.[0008]
SUMMARY OF THE INVENTION
• Accordingly, an object of the present invention is to provide a hand-held power (AC and/or DC) or pneumatic tool having a removably attachable portion comprising an sensor.[0009]
• In accordance with this and other objects, the present invention provides a hand-held power tool having a housing. The housing includes a drive mechanism connected to a rotary output shaft which is aligned along a tool axis. Further, a handle portion is aligned along a handle axis. The handle portion has a power activator switch thereon for activating the drive mechanism. A removably attachable portion comprising an object sensor is removably attached to the housing. The tool may be powered by electricity (AC and/or DC power) or compressed air.[0010]
• In another embodiment, a hand-held drill comprises a battery pack. A removably attachable portion containing the object sensor is removably attached to the battery pack.[0011]
• The removably attachable portion may further comprise a level.[0012]
• In another embodiment, the hand-held tool is a reciprocating saw having a drive mechanism and a housing. A removably attachable portion comprising an object sensor is removably attached to the housing. The reciprocating saw may be powered by electricity (AC or DC) or compressed air.[0013]
• The above object and other objects, features, and advantages of the present invention are readily apparent from the following detailed description of the best mode for carrying out the invention when taken in connection with the accompanying drawings.[0014]
BRIEF DESCRIPTION OF THE DRAWINGS
• FIG. 1 is a perspective view of a hand-held power tool having a removably attachable portion comprising an object sensor, in accordance with the present invention.[0015]
• FIG. 2 is a cross-sectional of a hand-held power tool having a removably attachable portion having an object sensor therein, in accordance with the present invention;[0016]
• FIG. 3 is a perspective view of a hand-held power tool having a removably attachable portion having an object sensor and a level, in accordance with the present invention;[0017]
• FIG. 4 is a perspective view of the power source end of a hand-held power tool having a removably attachable portion having an object sensor and level, accordance with the present invention;[0018]
• FIG. 5 is a perspective view of the power source end of a hand-held power tool having a removably attachable portion having an object sensor and a level, in accordance with the present invention.[0019]
• FIG. 6 is a perspective view of the removably attachable portion having a level on a piece of wood in accordance with the present invention;[0020]
• FIG. 7 is a top of the removably attachable portion having an object sensor in accordance with the present invention;[0021]
• FIG. 8 is a perspective view of a hand-held power tool having a bull's eye level; and[0022]
• FIG. 9 is a perspective view of a reciprocating saw powered by compressed air having a removably attachable portion comprising an object sensor accordance with the present invention.[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
• Referring now to FIG. 1, an electric hand-held[0024]power drill10 is shown.Power drill10 has ahousing12 which accommodates a drive mechanism andmotor14 for driving arotary output shaft16. The drive mechanism, motor, and rotary output shaft are aligned along atool axis18.Housing12 further includes ahandle portion20 for gripping thepower tool10, and directing atool end21 toward a workpiece.Handle portion20 is aligned along ahandle axis22.
• In operation, a tool such as a tool bit, drill bit, or similar device is coupled to the[0025]rotary output shaft16 for working on a workpiece. The tool is removably coupled torotary output shaft16 using achuck29, as conventionally known. Chuck29 may be keyless or require a key (not shown) to open and close the chuck. Common tasks performed by the tool and hand-held power drill combination include, for example, drilling holes and driving fasteners on and into the workpiece.
• A[0026]power activation switch24 is disposed on the handle for activating the drive mechanism andmotor14 to rotate the rotary output shaft. Preferably, abattery26 is connected to thehandle portion20 at thepower supply end28 and provides electrical DC power to activate the drive mechanism andmotor14 for rotating therotary output shaft16. However, the present invention may be incorporated into corded power drills (not shown) supplying AC power as well. The term electric as used in this application means electric power by means of AC or DC power. Additionally, the present invention may be incorporated into compressed air-powered tools as well (as shown in FIG. 9). Thedrive mechanism14 andpower activation switch24 for a compressed air-powered tool will be of a type known by those skilled in the art.
• In accordance with the preferred embodiment of the present invention, removably[0027]attachable portion30 is illustrated showing it attached to drill10 in both a perspective and cross-sectional view in FIGS. 1 and 2, respectively. The removablyattachable portion30 is slid ontohousing12 from the rear.Housing12 may contain outwardly projectingflanges72 which creategrooves76. Removablyattachable portion30 has inwardly projectingflanges34 creatinggrooves36. When the removably attachedportion30 is slid ontohousing12, theflanges34 and72 cooperate withgrooves36 and76 to fix the removably attachable portion ontohousing12 as shown in FIG. 2. A detailed description of removablyattachable portion30 will be provided hereinafter.
• Alternatively, as shown in FIG. 3, the removably[0028]attachable portion30 can be attached to thedrill10 using a pair ofprotrusions54 and56 extending upwards fromhousing12. A pair ofrecesses58 and59 formed in the bottom of removablyattachable portion30 are sized to receiveprotrusions54 and56 and removably attach the removablyattachable portion30 to thehousing12. Conversely, the removableattachable portion30 may comprise protrusions and thehousing12 may contain recesses to receive the protrusions. Other attachment schemes, known to individuals of ordinary skill in the art, which allow removablyattachable portion30 to be removably attached tohousing12 may also be used.
• In an alternative embodiment illustrated in FIGS. 4 and 5, the removably[0029]attachable portion30 is disposed at thepower supply end28 of thehandle portion20.Power supply end28 has a pair ofslots44 configured to removably affix removably attachableportion30 tohousing12. Removablyattachable portion30 has anunderside45 formed to fitslots44 for removable attachment thereto.
• As best shown in FIGS. 2 and 5, removably[0030]attachable portion30 includes anobject sensor60 for detecting studs hidden underneath drywall, electrical lines, conduit, pipe, various metals, rebar, and other hidden materials. Theobject sensor60 is of a type commonly available. Theobject sensor60 may include avisible light62 which illuminates when the object sensor is placed over a stud as shown in FIG. 7. Further, the object sensor may comprise aspeaker64 which makes an audible sound when, for example, a stud or “live” wire is detected. Other features, such as meters, may also be included depending on the features of the object sensors. Additionally, removablyattachable portion30 may be configured with alevel52.
• Removably[0031]attachable portion30 also may be provided with arecess38 for receivingtool bit40 where the bit is captured inrecess38 by a detent formed by two opposingspring protrusions42. Preferably, anidentical recess38 is disposed on the opposite side of removablyattachable portion30 having a detent formed byspring protrusions42 for holding anothertool bit40 securely in place.
• In operation, the[0032]drill10 of the present invention is used as a normal drill. When the tradesman must check the orientation of a surface, he can detach the removablyattachable portion30 from the drill and place it on asurface70 as shown in FIG. 6. To locate a stud or other hidden materials, the removablyattachable portion30 is detached fromdrill10 and moved along asurface80 untilstud75 is located as shown in FIG. 7.
• Additionally, as shown in FIG. 8, a bull's[0033]eye bubble level78 is disposed at the rear end ofhousing12 in a plane essentially perpendicular totool axis18 to indicate when the tool axis is vertical.
• The present invention may also be incorporated onto other hand-held power tools such as a reciprocating saw (as shown in FIG. 9), a nailer, a power screwdriver, a circular saw, or a jigsaw. The tools may be powered by electric power (corded (AC) or battery operated (DC)), compressed air, or other means.[0034]
• Referring now to FIG. 9, reciprocating[0035]saw100 has ahousing112, and adrive mechanism114. In this example, the drive mechanism is powered by compressed air throughnipple150 in a manner known by those skilled in the art. The removablyattachable portion130 comprises anobject sensor160 and is removably attachable tohousing112 in any manner as described above. Theobject sensor160 may further comprise a light162 andspeaker164 to alert the tradesman of the presence of a stud, electrical line, or other hidden materials.
• Thus, the present invention has many advantages and benefits over the prior art. For example, the present invention provides a means for making a sensor and level readily available to a tradesman.[0036]
• Alternatively, the object sensor can be designed to attach to the electric power cord and/or the compressed air hose. The object sensor may comprise a trough on any of its surfaces sized to receive the electric power cord and/or compressed air hose. The trough may be sized slightly smaller than the cord and/or hose for secure attachment. Tangs may project from the surface having the trough to partially cover the trough to further secure the cord and/or hose. When the tradesman desires to use the object sensor, he can either use the sensor attached to the cord and/or hose or simply remove the object sensor from the cord and/or cable by gently pulling on the object sensor until it is released. When finished, the tradesman can reattach the object sensor to the cord and/or hose by pressing the cord and/or hose into the trough.[0037]
• The object sensor may also be attached to the cord and/or hose using a C-shaped clamp that is attached to the housing. The C-shaped clamp may be manufactured out of a resilient plastic or metal such that it flexes to fit over the cord and/or hose and then snaps back securely around the cord and/or hose. The other end of the clamp may be directly attached to the object sensor or connected to the object sensor using a chain or similar device. Similarly, the tradesman may use the object sensor while it is attached to the cord and/or hose or he may remove the object sensor with a gentle pull for use and reattach it to the cord and/or hose when finished using it.[0038]
• One skilled in the art by devise alternate methods of attaching the object sensor to the cord and/or hose.[0039]
• While embodiments of the invention have been illustrated and described, it is not intended that these embodiments illustrate and describe all possible forms of the invention. Rather, the words used in the specification are words of description rather than limitation, and it is understood that various changes may be made without departing from the spirit and scope of the invention.[0040]

Claims (25)

What is claimed is:

1. A hand-held power tool comprising:

a housing including a drive mechanism and motor provided with a rotary output shaft aligned along a tool axis and a handle portion aligned along a handle axis, the handle portion having a power activator switch mounted thereon; and

a removably attachable portion releasably attachable to the housing of the hand-held power tool, the removable attachable portion comprising an object sensor.

2. The hand-held power tool ofclaim 1 wherein the housing has at least one flange formed thereon for removably affixing the removably attachable portion to the housing.

3. The hand-held power tool ofclaim 1 wherein the housing comprises outwardly projecting housing flanges and housing grooves and the removably attachable portion comprises two inwardly projecting portion flanges and portion grooves and wherein the flanges and grooves on the housing cooperate with the flanges and grooves on the removably attachable portion to releasably affix the removably attachable portion to the housing.

4. The hand-held power tool ofclaim 1 wherein the removably attachable portion has a flat, smooth bottom surface.

5. The hand-held power tool ofclaim 4 wherein the removably attachable portion further comprises a level parallel with the tool axis and the flat, smooth bottom surface so as to advise of the inclination of the tool axis relative to a horizontal plane.

6. The hand-held power tool ofclaim 1 wherein the housing contains a bull's eye bubble level in a plane essentially perpendicular to the tool axis.

7. The hand-held power tool ofclaim 1 wherein the hand-held power tool is a portable electric drill.

8. The hand-held power tool ofclaim 1 wherein the hand-held power tool is powered by AC electrical energy.

9. The hand-held power tool ofclaim 1 wherein the hand-held power tool is powered by DC electrical energy.

10. The hand-held power tool ofclaim 1 wherein the housing of the power tool comprises at least one protrusion and the removably attachable portion comprises at lease one recess sized to receive the protrusion for releasably attaching the removably attachable portion.

11. A portable hand-held power tool comprising:

a housing including a drive mechanism and motor provided with a rotary output shaft aligned along a tool axis and a handle portion aligned along a handle axis, the handle portion having a power activator switch mounted thereon;

a battery attached to the housing and in electrical connection with the motor for providing electrical power to the drive motor; and

a removably attachable portion releasably attachable to the battery, the removably attachable portion having an object sensor.

12. The portable hand-held power tool ofclaim 11 wherein the battery has at least one slot formed thereon for releasably affixing the removably attachable portion to the battery.

13. The hand-held power tool ofclaim 11 wherein the removably attachable portion further comprises a level parallel with the tool axis so as to advise of the inclination of the tool axis relative to a horizontal plane.

14. The hand-held power tool ofclaim 11 wherein the hand-held power tool is a portable drill.

15. A hand-held power tool comprising a housing, a drive mechanism contained within the housing, and a removably attachable portion removably attachable to the housing wherein the removably attachable portion comprises an object sensor.

16. The hand-held power tool ofclaim 15 wherein the hand-held power tool is a reciprocating saw.

17. The hand-held power tool ofclaim 15 wherein the hand-held power tool has a rotary shaft.

18. The hand-held power tool ofclaim 15 wherein the hand-held power tool is powered by compressed air.

19. The hand-held power tool ofclaim 15 wherein the hand-held power tools is powered by electrical energy.

20. The hand-held power tool ofclaim 15 wherein the hand-held power tool is powered by a battery.

21. The hand-held power tool ofclaim 15 wherein the hand-held power tool is powered by AC energy.

22. The hand-held power tool ofclaim 15 wherein the housing further comprises at least one flange formed thereon and the removably attachable portion containing at least one flange and wherein the flanges cooperate to releasably attach the removably attachable portion to the housing.

23. The hand-held power tool ofclaim 15 wherein the housing of the power tool comprises at least one protrusion and the removably attachable portion comprises at lease one recess sized to receive the protrusion for releasably attaching the removably attachable portion.

24. The hand-held power tool ofclaim 15 wherein the housing comprises outwardly projecting housing flanges and housing grooves and the removably attachable portion comprises two inwardly projecting portion flanges and portion grooves and wherein the flanges and grooves on the housing cooperate with the flanges and grooves on the removably attachable portion to releasably affix the removably attachable portion to the housing.

25. The hand-held power tool ofclaim 17 wherein the removably attachable portion further comprises a level so as to advise of the inclination of the tool relative to a horizontal axis.

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