WO2015164946A1

WO2015164946A1 - Multi-bit tool with bi-directional ratchet mechanism

Info

Publication number: WO2015164946A1
Application number: PCT/CA2015/000277
Authority: WO
Inventors: Gerard Grand
Original assignee: Gerard Grand
Priority date: 2014-05-01
Filing date: 2015-05-01
Publication date: 2015-11-05
Also published as: AU2019253865A1; EP3137263A4; CA2984687A1; CA2984687C; AU2015252693A1; EP3137263B1; EP3137263A1

Abstract

A novel ratcheting multi-bit tool (100) comprises a handle (110) and a bit chuck (130) mounted on the handle for rotation of the bit chuck and the handle with respect to each other about an axis of rotation (R). A plurality of working bits (150) retained in the handle and means (190) for moving the working bits between a retracted position and an in-use position where the working bit is received in a torque transmitting relation by the bit chuck. A bi-directional rotation- locking mechanism (220) operatively interposed between the handle and the bit chuck. A coupler (240) for each working bit having a first component (241) connected to the working bit and a second component (242) connected to said means for moving. The first component and the second component are connected one to the other for free rotational movement one with respect to the other about said axis of rotation (R).

Description

MULTI-BIT TOOL WITH BI-DIRECTIONAL RATCHET MECHANISM

FIELD OF THE INVENTION

[0001] The present invention relates to multi-bit tools, and more particularly to ratcheting multi-bit tools.

BACKGROUND OF THE INVENTION

[0002] Various types of multi-bit tools, such as screwdrivers, have been widely available to the public for many years. Multi-bit tools provide a convenient means for having various types of working bits readily available for use.

[0003] Earlier types of multi-bit tools have removable and replaceable working bits that arc typically arc stored in the handle of the driver. The working bits may be manually inserted one at a time, as selected, in an in-usc position into a bit chuck at the front of the driver, or alternatively may be inserted into an extension member that is itself inserted into the open front end of the bit chuck.

[0004] For increased convenience in terms of turning of threaded fasteners by a handheld driver, it is known to include a ratchet mechanism in multi-bit tools having removable and replaceable working bits. Typically, the ratchet mechanism is opcrativcly disposed between the bit chuck and the main body of the driver. The rotational direction of ratcheting of the ratchet mechanism is selectable for turning threaded fasteners cither clockwise or counter-clockwise.

[0005] For the multi-bit tools having removable and replaceable working bits as described above, the inclusion of a ratchet mechanism is quite straight forward. The longitudinal forces experienced by the driver during use, in reaction to pushing the driver onto a threaded fastener, arc simply transmitted through the rachct mechanism to the handle.

[0006] One such prior art ratcheting screw driver having readily removable and replaceable working bits that arc inserted into the bit chuck at the open front end and that arc storablc in the main body is one made by Stanley Works of New Britain, Connecticut, under the name brand HUSKY.

[0007] Another such ratcheting driver is disclosed in the United States Design Patent D562,665, issued

February 26, 2008 to Gao, and entitled Ratcheting Screwdriver Assembly.

[0008] Yet another such prior art ratcheting screwdriver is taught in United States Patent 5,806,381 , issued September 15, 1998 to Lin, and entitled Ratchet Screw Driver Assembly. The ratchet screwdriver includes a driving stem having a gear rotatably engaged in the bore of a handle and having a free end or engaging with a fastener to be driven. A ratchet mechanism is engaged in the handle and engaged with the gear of the driving stem portion clcctivcly driving the driving stem. A barrel is rotatably engaged on the driving stem and removable along the driving stem or engaging around the fastener and for preventing the fastener from being tilted and preventing the fastener from hurting the hand of the user.

[0009] More recent multi-bit tools include a plurality of bit assemblies, typically six bit assemblies, opcrativcly mounted within the main body of the driver. Typically, each bit assembly includes a working bit secured to some type of bit extension, to form an operational mechanism. A manually operable actuation mechanism of some sort, possibly even a spring loaded actuation mechanism, is connected to the bit extension. Each bit assembly is movable singularly, or in other words one at a time, between a retracted position within the main body of the driver and a forwardly extended in-usc position whereat a working bit at the front end of bit assembly extends forwardly from the bit chuck of the driver for use. [00010] Further, each bit assembly, when it is in its forwardly extended in-usc position has a rcarwardly facing surface that abuts in force transmitting relation against a generally forwardly facing surface that is cither on the main body of the driver or on an internal part or portion of the driver, to thereby support the selected bit assembly in place during use.

[0001 1] The problem with trying to include a ratcheting mechanism in multi-bit tools having a plurality of bit assemblies is not readily apparent. As described above, in such multi-bit tools, when a bit assembly is in a forwardly extended in-usc position, the rcarwardly directed longitudinal force experienced by the driver during use, in reaction to pushing the driver onto a thread fastener, makes it very difficult to rotate the extended in-usc bit assembly with respect to the main body of the driver, in conjunction with the rotation of the bit chuck and the main body with respect to each other. Such transmission of longitudinal forces from the bit chuck to the main body of the driver without passing through the ratchet mechanism is in contrast to the situation of prior art multi-bit tools where the single bit is received into the open front end of the bit chuck, and the rcarwardly directed longitudinal forces arc received directly by the bit chuck and transmitted to the main body of the driver through the ratchet mechanism. Accordingly, it is very difficult, if not impossible to turn the handle portion of the main body with respect to the bit chuck during use, when permitted by the ratchet mechanism.

[00012] There is no known multi-bit tool having a plurality of bit assemblies that also has a ratcheting function.

[00013] It is an object of the present invention to provide a multi-bit tool having a plurality of rcconfigurablc bit assemblies that move from a retracted position generally within the main body of the driver and an extended position whereat a selected one of the moving bits of one of the rcconfigurablc bit assemblies is in a forwardly extended in-usc position with the working bit extending forwardly from the bit chuck, and having a ratchet mechanism that permits selection of rotation in a first rotational direction and locking of rotation to preclude rotation in a second rotational direction, and that permits selection of rotation in a second rotational direction and locking of rotation to preclude rotation in a first rotational direction.

[00014] It is an object of the present invention to provide a multi-bit tool having a plurality of rcconfigurablc bit assemblies that move from a retracted position generally within the main body of the driver and an extended position whereat a selected one of the moving bits of one of the rcconfigurablc bit assemblies is in a forwardly extended in-usc position with the working bit extending forwardly from the bit chuck, and having a bidirectional rotation-locking mechanism that permits selection of rotation in a first rotational direction and locking of rotation to preclude rotation in a second rotational direction, and that permits selection of rotation in a second rotational direction and locking of rotation to preclude rotation in a first rotational direction.

SUMMARY OF THE INVENTION

(00015] In accordance with one aspect of the present invention there is disclosed a novel multi-bit tool comprising a handle defining a longitudinal axis; a bit chuck having a bit-receiving opening and mounted on the handle for rotation of the bit chuck and the handle with respect to each other, about an axis of rotation; a plurality of working bits opcrativcly retained by the handle for movement between a retracted position whereat the working bit is generally disposed within the handle, and an in-usc position whereat the working bit is received in torque transmitting relation by the bit chuck and extends through the bit-receiving opening; means for moving the working bits, as selected, singularly between the retracted position and the in-usc position; means for selectively retaining a working bit in the forwardly extended in-usc configuration; a bi-directional rotation-locking mechanism opcrativcly interposed between the handle and the bit chuck; a coupler for each working bit, each coupler having a first component opcrativcly connected to the working bit and a second component opcrativcly connected to the means for moving the working bits, and wherein the first component and the second component arc connected one to the other for rotational movement one with respect to the other. [00016] In accordance with another aspect of the present invention there is disclosed a novel ratchet sleeve for a multi-bit tool having a plurality of individually selectable working bits. The ratchet sleeve comprises a main body having an outer handle portion and an inner driver-gripping portion connected one to the other for rotation of the outer handle portion and the inner driver-gripping portion with respect to each other about an axis of rotation; and a bi-directional rotation-locking mechanism opcrativcly interposed between the outer handle portion and the inner driver-gripping portion.

[00017] In accordance with another aspect of the present invention there is disclosed a novel bit assembly for use in multi-bit tool. The bit assembly comprises a bit holder having a bit-receiving recess; a bit extension attached in angularly variable relation to the bit holder; and a working bit having a front working end and a back end. The working bit is captured at its back end by the bit holder for rotation about the axis of rotation.

[00018] In accordance with another aspect of the present invention there is disclosed a novel bit mechanism for use in multi-bit tool. The bit assembly comprises a bit holder having a back end base portion and an annular wall structure extending forwardly from a back end adjacent the back end base portion to a front end, and defines a bit-receiving recess. The annular wall structure defines an axis of rotation. A working bit has a front working end and a back end. The working bit is captured at its back end by the bit holder for rotation about the axis of rotation.

[00019] In accordance with another aspect of the present invention there is disclosed a novel bit holder for use with a bit mechanism in multi-bit tool. The bit holder comprises a back end base portion and an annular wall structure extending forwardly from a back end adjacent the back end base portion to a front end; and a bit-receiving recess defined by the baek end base portion and the annular wall structure; wherein the annular wall structure defines an axis of rotation for a bit inserted therein. [00020] In accordance with another aspect of the present invention there is disclosed a novel bit assembly for use in multi-bit tool. The bit assembly comprises a scries of parts connected together in torque transmitting relation one to the next, the parts comprising, in seriatim, a handle, a bi-directional rotation-locking mechanism, a bit chuck, a bit holder of a bit assembly, and a selected working bit.

[00021] In accordance with another aspect of the present invention there is disclosed a novel bit assembly for use in multi-bit tool. The bit assembly comprises a scries of parts connected together in torque transmitting relation one to the next, the parts comprising, in seriatim, a handle, a bi-directional rotation-locking mechanism, a bit chuck, a rotational indexing system, a bit holder of a bit assembly, and a selected working bit.

[00022] In accordance with one aspect of the present invention there is disclosed a novel multi-bit tool comprising a handle defining a longitudinal axis; a bit chuck having a bit-receiving opening and mounted on the handle for rotation of the bit chuck and the handle with respect to each other, about an axis of rotation; a plurality of working bits opcrativcly retained by the handle for movement between a retracted position whereat the working bit is generally disposed within the handle, and an in-usc position whereat the working bit is received in torque transmitting relation by the bit chuck and extends through the bit-receiving opening; means for moving the working bits, as selected, singularly between the retracted position and the in-usc position; means for selectively retaining a working bit in the forwardly extended in-usc configuration; a bi-directional rotation-locking mechanism opcrativcly interposed between the handle and the bit chuck; wherein each of the working bits arc part of a corresponding bit assembly; wherein each bit assembly has a bit holder; wherein the working bit is connected to the bit holder for rotational movement one with respect to the other.

[00023] Other advantages, features and characteristics of the present invention, as well as methods of operation and functions of the related elements of the structure, and the combination of parts and economics of manufacture, will become more apparent upon consideration of the following detailed description and the appended claims with reference to the accompanying drawings, the latter of which is briefly described herein below. BRIEF DESCRIPTION OF THE DRAWINGS

[00024] The novel features which arc believed to be characteristic of the multi-bit tool and ratchet sleeve for a multi-bit tool according to the present invention, as to its structure, organization, use and method of operation, together with further objectives and advantages thereof, will be better understood from the following drawings in which a presently preferred embodiment of the invention will now be illustrated by way of example. It is expressly understood, however, that the drawings arc for the purpose of illustration and description only, and arc not intended as a definition of the limits of the invention. In the accompanying drawings:

[00025] Figure 1 is a perspective view from the front of the multi-bit tool according to the present invention, with the bit assembly in its extended in-usc position;

[00026] Figure 2 is a perspective view from the rear of a front portion of the first embodiment of the multi-bit tool of Figure 1, with the bit assembly in its extended in-usc position;

[00027] Figure 3 is a perspective view from the front of the first embodiment of the multi-bit tool of

Figure 1 , but with the bit assembly in its retracted position;

[00028] Figure 4 is a perspective view from the side and slightly from the rear of the multi-bit tool of

Figure 1 , with the bit assembly in its retracted position;

[00029] Figure 5 is a cut-away perspective view of the multi-bit tool of Figure 1, with some components removed for the sake of clarity; [00030] Figure 6 is a cut-away perspective view of the multi-bit tool of Figure 1 , with one bit assembly in its extended position;

[00031] Figure 7 is a cut-away perspective view of the multi-bit tool of Figure 1 , but from a more forward angle than Figure 6, with one bit assembly in its extended position;

[00032] Figure 8 is a cut-away perspective view of the multi-bit tool of Figure 1 , with a portion of one bit assembly shown in its extended position;

[00033] Figure 9 is a cut-away perspective view of the multi-bit tool of Figure 1 , but shown from a slightly different angle than Figure 8, with a portion of one bit assembly shown in its extended position;

[00034] Figure 10 is a cut-away perspective view of the multi-bit tool of Figure 1;

[00035] Figure 1 1 is a cut-away perspective view of the multi-bit tool of Figure 1 , but shown from a slightly different angle than Figure 10;

[00036] Figure 12 is a cut-away perspective view of the multi-bit tool of Figure 1 , and similar to Figure 1 1 but with a few additional components shown;

[00037] Figure 13 is a perspective view from the side and front of the multi-bit tool of Figure 1 , with components omitted for the sake of clarity;

[00038] Figure 14 is a cut-away perspective view from the front of the bi-directional rotation-locking mechanism of the multi-bit tool of Figure 1 ; [00039] Figure 15 is a perspective view of the front cone portion of the multi-bit tool of Figure 1 , with the

"C"-clip partially removed;

[00040] Figure 16 is a perspective view of the front cone portion of the multi-bit tool of Figure 1 , with the

"C"-clip fully removed and the sections of the front cone portion separated one from the other;

[00041 ] Figure 17 is a perspective view of the back portion of a bit assembly;

[00042] Figure 18 is a perspective view from the front of the back portion of a bit assembly;

[00043] Figure 19 is an exploded side clcvational view of the front cone portion of the multi-bit tool of

Figure 1 , with a bit assembly about to enter the front cone portion;

[00044] Figure 20 is a perspective view from the front of a bit assembly;

[00045] Figure 21 is a cut-away perspective view from the front of a bit assembly;

[00046] Figure 22 is a side clcvational view of a bit assembly;

[00047] Figure 23 is a side clcvational view of a bit assembly, with the removable and replaceable bit just having been removed from the remainder of the bit assembly;

[00048] Figure 24 is a side clcvational view of a bit assembly, with the removable and replaceable bit removed and shown beside the remainder of the bit assembly;

[00049] Figure 25 is a perspective view of a removable and replaceable bit; and, [00050] Figure 26 is a side clcvational view of the back portion of a bit assembly.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[00051] Reference will now be made to Figures 1 through 27, which show a first embodiment of the multi- bit tool of the present invention. In brief, first embodiment of the present invention comprises a multi-bit tool 100. In brief, the multi-bit tool 100 comprises a handle 1 10, a bit chuck 130, a plurality of working bits 150, with each working bit 150 being part of a corresponding bit assembly 170, means 190 for moving the working bits 150, bidirectional rotation-locking mechanism 220, and a coupler 240.

[00052] The handle 1 10 has a front end 1 1 1 and a back end 1 12 and defines a longitudinal axis "L" that generally extends the length of the multi-bit tool 100 from the front end 1 1 1 to the back end 1 12. The handle 1 10 is preferably made from a suitable plastic material and has a substantially hollow interior 1 14 defined by an inner surface 1 15. The substantially hollow interior 1 14 houses various components of the multi-bit tool 100. The outer surface 1 16 of the handle 1 10 forms a suitable grip for turning the multi-bit tool 100, or at least the handle 1 10 portion of the multi-bit tool 100, about the longitudinal axis "L".

[00053] A bit chuck 130 has a dodccagonally (twelve sided) shaped bit-rccciving opening 13 1 and is mounted on the handle 1 10 at the front end 1 1 1 thereof for rotation of the bit chuck 130 and the handle 1 10 with respect to each other, about an axis of rotation "R". The bit chuck 130 comprises a forward bit chuck portion 132 having a front end 133 and a back end 134 and a rearward bit chuck portion 137 having a front end 138 and a back end 139. The forward bit chuck portion 132 and the rearward bit chuck portion 137 arc held together by a large "C'-clip 1 19 engaged in co-operating annular slots 141 a, 141b in the forward bit chuck portion 132 and the rearward bit chuck portion 137, respectively. The forward bit chuck portion 132 is disposed in surrounding relation, adjacent its back end 134, with respect to the front end 138 of the rearward bit chuck portion 137.

[00054] The multi-bit tool 100 further comprises a ball bearing assembly 160 having a first handle member

161 and a second handle member 162. The first handle member 161 is securely connected in torque transmitting relation to the bit chuck 130 by means of threaded fasteners or a suitable adhesive (not specifically shown). The second handle member 162 is securely connected in torque transmitting relation to the handle 1 10, at the front end 1 1 1 of the handle 1 10. The first handle member 161 and the second handle member 162 arc connected one to the other by the ball bearing assembly 160 for rotational movement one with respect to the other about the axis of rotation "R".

[00055] The bit chuck 130 is mounted on the handle 1 10 for rotation of the bit chuck 130 and the handle

1 10 with respect to each other, about an axis of rotation "R".

[00056] The multi-bit tool 100 further comprises a bit holder 164 having a bit-rccciving recess 165 open to the front end of the bit holder 164 an disposed immediately rcarwardly of the bit-rccciving opening 13 1 of the bit chuck 130.

[00057] A bit extension 166 is attached in angularly variable relation to the bit holder 164, so as to extend generally rcarwardly from the bit holder 164. In the illustrated embodiment, the bit extension 166 connects to a corresponding actuator mechanism, which is the means 190 for moving the working bits 150, as selected, singularly between said retracted position and said in-usc position.

[00058] As can be best seen in Figures 20 through 26, the bit holder 164 comprises a back end base portion

167 and an annular wall structure 168 extending forwardly from a back end 168b adjacent the back end base portion 167 to a front end 168f. The annular wall structure 168 defines the bit-rccciving recess 165 and the axis of rotation "R". The annular wall structure 168 should be made from a flexible plastic material. Preferably, the back end base portion 167 and the annular wall structure 168 of the bit holder 164 arc integrally formed one with the other.

[00059] The bit holder 164 has an outer surface 1 16 comprising a plurality of flat surfaces 169 disposed in angled relation one to the next around the perimeter of the bit holder 164. The plurality of flat surfaces 169 arc grippablc in torque transmitting relation by a co-operating bit chuck 130.

[00060] The annular wall structure 168 comprises a plurality of wall portions 168w extending forwardly from the back end to the front end, and an equal plurality of forwardly extending slots 169s, each slot 169s having a front end and a back end. Adjacent ones of the wall portions 168w have one slot 169s disposed therebetween. Preferably, each of the forwardly extending slots 169s is open at its front end 169f in order to permit the back end of the working bit 150 to more readily slide in and out of the bit holder 164.

[00061] The plurality of working bits 150 arc opcrativcly retained by the handle 1 10, as perhaps can be best seen in Figure 7, for movement between a retracted position and an in-usc position. In Figures 3 and 4, the ix bit assemblies 170 arc in their respective retracted positions. Figures 1 , 2 and 6 through 9, one selected bit assembly 170 is in its in-usc position. Further, in Figures 1 , 2 and 6 through 9, five bit assemblies 170 arc in their respective retracted positions. In the in-usc position, the working bit 150 is received in torque transmitting relation by the bit chuck 130 and extends through the bit-rccciving opening 131 of the bit chuck 130.

[00062] Each of the working bits 150 is part of a corresponding bit assembly 170, and the corresponding plurality of bit assemblies 170 arc opcrativcly mounted within the handle 1 10.

[00063] Each working bit 150 has a front working end 150f and a back end 150b and extends therebetween, and preferably is integrally formed from a single piece of plastic material. The front working end 150f may be any desirable type of bit or blade or the like. The central section of each working bit 150 is hcxagonally shaped in cross-section to engage the bit-receiving opening 13 1 in torque transmitting relation. The working bit 150 has an annular channel 154 disposed adjacent the back end of the working bit 150. A small "C"-clip 155 extends partially through the forward bit chuck portion 132 to engage an annular channel 154 in the working bit 150 in interfering relation with the portion of the bit holder 164 that defines the annular channel 154, to thereby retain the working bit 150 in place until it is specifically pulled out. In this manner, the working bit 150 is captured at its back end by the bit holder 164 for rotation about the axis of rotation "R". Further, it can be seen that each of the working bits 150 is part of a corresponding bit assembly 170, and that the working bit 150 is connected to the bit holder 164, which is also part of the bit assembly 170, for rotational movement one with respect to the other.

[00064| Further, the working bit 150 includes a first portion 173 of an indexing system 172 and the bit holder 164 includes a second portion 174 of the indexing system 172.

xxx

[00065] The first portion 173 of the indexing system 172 comprises a plurality of radially projecting teeth

173 on the outer surface of the back end portion 151 of the working bit 150. The radially projecting teeth 173 arc elongate front to back and also arc aligned along the axis of rotation "R".

[00066] The second portion 174 of the indexing system 172 is retained by the annular wall structure 168 and comprises a plurality of inwardly facing channels 174 shaped, dimensioned and otherwise adapted to engage the radially projecting teeth 173 on the outer surface of the back end portion 151 of the working bit 150. In this manner, the first portion 173 and the second portion 174 of the indexing system 172 co-operate with each other to thereby index the working bit 150 with respect to the bit holder 164 in a plurality of rotational positions about the axis of rotation "R". Each of the inwardly facing channels 174 is aligned along the axis of rotation "R". The number of inwardly facing channels 174 is preferably twice the number of flat surfaces 169 on the outer surface 1 16 of the bit holder 164. This permits the first portion 173 of the indexing system 172 to be received in the inwardly facing channels 174 every thirty (30) degrees of rotation of the working bit 150 with respect to the bit holder 164. [00067] The indexing system 172 precludes the working bit 150 from freely turning to any rotational angle within the bit holder 164. Such free rotational turning of the working bit 150 is highly undesirable since the working bit 150 would have trouble rotationally lining up with the dodccagonally (twelve sided) shaped bit-receiving opening 13 1 in the bit chuck 130. Instead, the twelve positions of the indexing system 172 help rotationally align the working bit 150 with the dodccagonally (twelve sided) shaped bit-receiving opening 13 1 in bit chuck 130, while allowing the working bit 150 to have some rotational freedom, in case there is rotational mis-alignmcnt with the bit- rccciving opening 131.

[00068] There is also means 190 for moving the working bits 150, as selected, singularly between the retracted position and the in-usc position. The means 190 for moving the working bits 150 between the retracted position and the in-usc position comprises at least one actuator mechanism, and in the first embodiment as illustrated, the at least one actuator mechanism comprise a plurality of actuator mechanisms 190, one for each working bit 150. The overall structure and operation of the actuator mechanism is not germane to this patent document. Any suitable actuator mechanism could be used.

[00069] The multi-bit tool 100 further comprises means 200 for selectively retaining a working bit 150 in the forwardly extended in-usc configuration. In the first embodiment as illustrated, the means 200 for selectively retaining a working bit 150 in the forwardly extended in-usc configuration comprises a forwardly facing abutment surface 200 on the central post 202 within the handle 1 10, disposed between the six bit assemblies 150. The forwardly facing abutment surface 200 can alternatively be elsewhere within the handle 1 10. Alternatively, any other suitable means 200 for selectively retaining a working bit 150 in the forwardly extended in-usc configuration can be used.

[00070] The multi-bit tool 100 of the present invention further comprises a bi-directional rotation- locking mechanism 220 opcrativcly interposed between the handle 1 10 and the bit chuck 130. As can be best seen in Figure 14, the bi-directional rotation-locking mechanism 220 comprises a bi-directional ratchet mcchnism 220. The first pawl portion 221 can engage the selector ring 224 to preclude movement of the handle 1 10 with respect to the bit chuck 130, in the first rotational direction "A". Accordingly, rotation or attempted of the handle 1 10 about the longitudinal axis "L" by the hand of a user, or by an automatic means in another embodiment, would cause corresponding rotation of the bit chuck 130 about the longitudinal axis "L", thereby permitting a threaded fastener to be turned. Further, when the working bit 150 is engaged in a fastener and the handle 1 10 is turned in a second rotational direction "B", the first pawl portion 221 permits movement of the handle 1 10 with respect to the bit chuck 130, in the second rotational direction "B". Accordingly, such rotation of the handle 1 10 about the longitudinal axis "L" by the hand of a user, or by an automatic means in another embodiment, would not cause corresponding rotation of the bit chuck 130 about the longitudinal axis "L", thereby precluding a threaded fastener from being turned.

[00071] Further, the second pawl portion 222 can engage the selector ring 224 to preclude movement of the handle 1 10 with respect to the bit chuck 130, in the second rotational direction "B". Accordingly, rotation or attempted rotation of the handle 1 10 about the longitudinal axis "L" by the hand of a user, or by an automatic means in another embodiment, would cause corresponding rotation of the bit chuck 130 about the longitudinal axis "L", thereby permitting a threaded fastener to be turned. When the working bit 150 is engaged in a fastener and the handle 1 10 is turned in a first rotational direction "A", the second pawl portion 222 permits movement of the handle 1 10 with respect to the bit chuck 130, in the first rotational direction. Accordingly, such rotation of the handle 1 10 about the longitudinal axis "L" by the hand of a user, or by an automatic means in another embodiment, would not cause corresponding rotation of the bit chuck 130 about the longitudinal axis "L", thereby precluding a threaded fastener from being turned.

[00072] The multi-bit tool 100 further comprises a coupler 240 for each working bit 150. Each coupler

240 has a first component 241 operatively connected to the working bit 150 and a second component 242 operatively connected to the means 190 for moving the working bits 150. The first component 241 and the second component 242 arc connected one to the other for rotational movement one with respect to the other. In the first embodiment as illustrated, the first component 241 and the second component 242 arc connected one to the other free rotational movement one with respect to the other about the axis of rotation "R". The first component 241 of the coupler 240 comprises a back end portion 151 of the working bit 150. The second component 242 of the coupler 240 comprises the bit holder 164 having a bit-receiving recess 165 and defining the axis of rotation "R". The working bit 150 is captured at the back end portion 151 by the bit holder 164 for rotation about the axis of rotation "R".

[00073] In the first embodiment as illustrated, the coupler 240 comprises a ball and socket joint. Each coupler 240 is part of a corresponding bit assembly 170. As discussed generally above, each bit assembly 170 comprises the working bit 150 and further comprises a bit extension 166 connected to the working bit 150. Each coupler 240 is disposed between the bit assembly 170 and the connected actuator mechanism 190.

[00074] In an alternative embodiment, which is not illustrated, it is contemplated that the coupler 240 could comprise a ball bearing mechanism.

[00075] In another alternative embodiment, which is not illustrated, it is contemplated that there is a first coupler 240 as described above, and that there is also a second coupler 240 disposed between the working bit 150 and the connected bit extension 166.

[00076] In another aspect of the present invention, there is a bit assembly 170 for use in multi-bit tool 100.

The bit assembly 170 comprises a scries of parts connected together in torque transmitting relation one to the next. These parts comprise, in seriatim, the handle 1 10, the bi-dircctional rotation-locking mechanism 220, the bit chuck 130, the bit holder 164 of the bit asse mbly 170, and the selected working bit 150.

[00077] In another aspect of the present invention, there is bit assembly 170 for use in multi-bit tool 100.

The bit assembly 170 comprises a scries of parts connected together in torque transmitting relation one to the next. The parts comprise, in seriatim, a handle 1 10, a bi-directional rotation-locking mechanism 220, a bit chuck 130, a rotational indexing system 172, a bit holder 164 of a bit assembly 170, and a selected working bit 150.

[00078] Other variations of the above principles will be apparent to those who arc knowledgeable in the field of the invention, and such variations arc considered to be within the scope of the present invention. Further, other modifications and alterations may be used in the design and manufacture of the multi-bit tool, of the present invention, without departing from the spirit and scope of the accompanying claims.

Claims

I CLAIM:

1. A multi-bit tool comprising: a handle defining a longitudinal axis; a bit chuck having a bit-receiving opening and mounted on said handle for rotation of said bit chuck and said handle with respect to each other, about an axis of rotation; a plurality of working bits operatively retained by said handle for movement between a retracted position whereat said working bit is generally disposed within said handle, and an in-usc position whereat said working bit is received in torque transmitting relation by said bit chuck and extends through said bit-receiving opening; means for moving said working bits, as selected, singularly between said retracted position and said in-usc position; means for selectively retaining a working bit in said forwardly extended in-usc configuration; a bi-directional rotation-locking mechanism operatively interposed between said handle and said bit chuck; a coupler for each working bit, each coupler having a first component operatively connected to said working bit and a second component operatively connected to said means for moving said working bits, and wherein said first component and said second component arc connected one to the other for rotational movement one with respect to the other.

2. The multi-bit tool of Claim 1 , wherein said working bit has a front working end and a back end, and said first component of said coupler comprises a back end portion of said working bit.

3. The multi-bit tool of Claim 2, wherein said second component of said coupler comprises a bit holder having a bit-receiving recess and defining an axis of rotation, and wherein said working bit is captured at said back end portion by said bit holder for rotation about said axis of rotation.

4. The multi-bit tool of claim 3, wherein said working bit has an annular channel disposed in said back end portion of the working bit, and further comprising a "C"-clip extending partially through said bit holder to engage said annular channel in said back end portion of said working bit.

5. The multi-bit tool of claim 1 , wherein said bit holder has an outer surface comprising a plurality of flat surfaces disposed in angled relation one to the next around the perimeter of said bit holder, and wherein said plurality of flat surfaces arc grippablc in torque transmitting relation by a bit chuck.

6. The multi-bit tool of claim 5, wherein the number of inwardly facing channels is twice the number of flat surfaces on said outer surface of said bit holder.

7. The multi-bit tool of claim 3, wherein said working bit is integrally formed from a single piece of material.

8. The multi-bit tool of Claim 1 , wherein said coupler comprises a ball and socket joint.

9. The multi-bit tool of Claim 1 , wherein said coupler comprises a ball bearing mechanism.

10. The multi-bit tool of Claim 1 , wherein said bi-dircctional rotation-locking mechanism comprises a bi-dircctional ratchet mechanism.

1 1. The multi-bit tool of Claim 1 , wherein each of said working bits is part of a corresponding bit assembly, and the corresponding plurality of bit assemblies arc opcrativcly mounted within said handle.

12. The multi-bit tool of Claim 1 1 , wherein each said coupler is part of a corresponding bit assembly.

13. The multi-bit tool of Claim 12, wherein each said bit assembly comprises said working bit and further comprises a bit extension connected to said working bit.

14. The multi-bit tool of Claim 13, wherein each said coupler is disposed between said working bit and said bit extension.

15. The multi-bit tool of Claim 14, wherein said means for moving said working bits between said retracted position and said in-usc position comprises at least one actuator mechanism.

1 . The multi-bit tool of Claim 15, wherein said at least one actuator mechanism comprise a plurality of actuator mechanisms, one for each working bit.

17. The multi-bit tool of Claim 16, wherein each said coupler comprises a first coupler disposed between said working bit and the connected bit extension and further comprising a second coupler disposed between said bit assembly and the connected actuator mechanism.

18. The multi-bit tool of Claim 1 , wherein said means for moving said working bits between aid retracted position and said in-usc position comprises at least one actuator mechanism.

19. The multi-bit tool of Claim 16, wherein each said coupler is disposed between said bit assembly and the connected actuator mechanism.

20. The multi-bit tool of Claim 19, wherein each said coupler is disposed between said bit assembly and the connected actuator mechanism.

21. The multi-bit tool of Claim 1 , further comprising a ball bearing assembly having a first housing member securely connected to said bit chuck, and a second housing member securely connected to said handle, and wherein said first housing member and said second housing member arc connected one to the other by said ball bearing assembly for rotational movement one with respect to the other about said axis of rotation.

22. The multi-bit tool of Claim 1 , wherein said bit chuck comprises a forward bit chuck portion having a front end and a back end and a rearward bit chuck portion having a front end and a back end.

23. The multi-bit tool of Claim 22, wherein said forward bit chuck portion is disposed in surrounding relation adjacent its back end with respect to said front end of said rearward bit chuck portion.

24. The multi-bit tool of Claim 23, further comprising a "C"-clip extending partially through said forward bit chuck portion to engage an annular channel in said working bit.

25. The multi-bit tool of Claim 1 , further comprising a bit holder having a bit-receiving recess, a bit extension attached in angularly variable relation to said bit holder, wherein said working bit has a front working end and a back end, and wherein said working bit is captured at its back end by said bit holder for rotation about said axis of rotation.

26. The multi-bit tool of claim 1 , wherein said working bit includes a first portion of an indexing system and said bit holder includes a second portion of said indexing system, and wherein said first portion and said second portion of said indexing system co-operate with each other to thereby index said working bit with respect to said bit holder in a plurality of rotational positions about said axis of rotation.

27. The multi-bit tool of claim 26, wherein said bit holder comprises a back end base portion and an annular wall structure extending forwardly from a back end adjacent said back end base portion to a front end, and wherein said annular wall structure defines said bit-receiving recess and said axis of rotation.

28. The multi-bit tool of claim 27, wherein said first portion of said indexing system is retained by said annular wall structure.

29. The multi-bit tool of claim 28, wherein said annular wall structure is made from a flexible plastic material.

30. The multi-bit tool of claim 29, wherein said annular wall structure comprises a plurality of wall portions extending forwardly from said back end to said front end, and an equal plurality of forwardly extending slots, each slot having a front end and a back end, wherein adjacent ones of said wall portions have one slot disposed between.

31. The multi-bit tool of claim 30, wherein each said forwardly extending slot is open at its front end.

32. The multi-bit tool of claim 30, wherein said first portion of said indexing system comprises a plurality of inwardly facing channels in said annular wall structure each aligned along said axis of rotation, and said second portion of said indexing system comprises a plurality of radially projecting teeth shaped, dimensioned and otherwise adapted to engage said inwardly facing channels in said annular wall structure.

33. The multi-bit tool of claim 1 , wherein said bit holder has an outer surface comprising a plurality of flat surfaces disposed in angled relation one to the next around the perimeter of said bit holder, and wherein said plurality of flat surfaces arc grippablc in torque transmitting relation by a bit chuck.

34. The multi-bit tool of claim 32, wherein the number of inwardly facing channels is twice the number of flat surfaces on said outer surface of said bit holder.

35. The multi-bit tool of claim 27, wherein said base portion and said annular wall structure of said bit holder arc integrally formed one with the other.

36. The multi-bit tool of claim 27, wherein said bit extension extends generally rcarwardly from said bit holder.

37. A bit assembly for use in multi-bit tool, said bit assembly comprising: a bit holder having a bit-receiving recess and defining an axis of rotation; a bit extension attached in angularly variable relation to said bit holder; and, a working bit having a front working end and a back end; wherein said working bit is captured at its back end by said bit holder for rotation about said axis of rotation.

38. The bit assembly of claim 37, wherein said working bit includes a first portion of an indexing system and said bit holder includes a second portion of said indexing system, and wherein said first portion and said second portion of said indexing system co-operate with each other to thereby index said working bit with respect to said bit holder in a plurality of rotational positions about said axis of rotation.

39. The bit assembly of claim 38, wherein said bit holder comprises a back end base portion and an annular wall structure extending forwardly from a back end adjacent said back end base portion to a front end, and wherein said annular wall structure defines said bit-receiving recess and said axis of rotation.

40. The bit assembly of claim 39, wherein said first portion of said indexing system is retained by said annular wall structure.

41. The bit assembly of claim 40, wherein said annular wall structure is made from a flexible plastic material.

42. The bit assembly of claim 41 , wherein said annular wall structure comprises a plurality of wall portions extending forwardly from said back end to said front end, and an equal plurality of forwardly extending slots, each slot having a front end and a back end, wherein adjacent ones of said wall portions have one slot disposed between.

43. The bit assembly of claim 42, wherein each said forwardly extending slot is open at its front end.

44. The bit assembly of claim 42, wherein said first portion of said indexing system comprises a plurality of inwardly facing channels in said annular wall structure each aligned along said axis of rotation, and said second portion of said indexing system comprises a plurality of radially projecting teeth shaped, dimensioned and otherwise adapted to engage said inwardly facing channels in said annular wall structure.

45. The bit assembly of claim 37, wherein said working bit has an annular channel disposed adjacent the back end of the working bit, and further comprising a "C"-clip extending partially through said bit holder to engage said annular channel in said working bit.

46. The bit assembly of claim 37, wherein said working bit has an annular channel disposed adjacent the back end of the working bit, and said bit holder has a co-operating dcfbrmablc projecting portion that fits into said annular channel.

47. The bit assembly of claim 37, wherein said bit holder has an outer surface comprising a plurality of flat surfaces disposed in angled relation one to the next around the perimeter of said bit holder, and wherein said plurality of flat surfaces arc grippablc in torque transmitting relation by a bit chuck.

48. The bit assembly of claim 37, wherein the number of inwardly facing channels is twice the number of flat surfaces on said outer surface of said bit holder.

49. The bit assembly of claim 39, wherein said base portion and said annular wall structure of said bit holder arc integrally formed one with the other.

50. The bit assembly of claim 39, wherein said bit extension extends generally rcarwardly from said bit holder.

51. A bit mechanism for use in multi-bit tool, said bit mechanism comprising: a bit holder having a back end base portion and an annular wall structure extending forwardly from a back end adjacent said back end base portion to a front end, and defining a bit-receiving recess; wherein said annular wall structure defines an axis of rotation; and, a working bit having a front working end and a back end; wherein said working bit is captured at its back end by said bit holder for rotation about said axis of rotation.

52. A bit holder for use with a bit mechanism in multi-bit tool, said bit holder comprising: a back end base portion and an annular wall structure extending forwardly from a back end adjacent said back end base portion to a front end; and, a bit-receiving recess defined by said back end base portion and said annular wall structure; wherein said annular wall structure defines an axis of rotation for a bit inserted therein.

53. A bit assembly for use in multi-bit tool, said bit assembly comprising: a scries of parts connected together in torque transmitting relation one to the next, said parts comprising, in seriatim, a handle, a bi-directional rotation-locking mechanism, a bit chuck, a bit holder of a bit assembly, and a selected working bit.

54. The bit assembly of claim 53, wherein said working bit includes a first portion of an indexing system and said bit holder includes a second portion of said indexing system, and wherein said first portion and said second portion of said indexing system co-operate with each other to thereby index said working bit with respect to said bit holder in a plurality of rotational positions about said axis of rotation.

55. A bit assembly for use in multi-bit tool, said bit assembly comprising: a scries of parts connected together in torque transmitting relation one to the next, said parts comprising, in seriatim, a handle, a bi-directional rotation-locking mechanism, a bit chuck, a rotational indexing system, a bit holder of a bit assembly, and a selected working bit.

56. A multi-bit tool comprising: a handle defining a longitudinal axis; a bit chuck having a bit-receiving opening and mounted on the handle for rotation of the bit chuck and the handle with respect to each other, about an axis of rotation; a plurality of working bits opcrativcly retained by the handle for movement between a retracted position whereat the working bit is generally disposed within the handle, and an in-usc position whereat the working bit is received in torque transmitting relation by the bit chuck and extends through the bit-receiving opening; means for moving the working bits, as selected, singularly between the retracted position and the in-usc position; means for selectively retaining a working bit in the forwardly extended in-usc configuration; a bi-directional rotation-locking mechanism opcrativcly interposed between the handle and the bit chuck; wherein each of the working bits arc part of a corresponding bit assembly; wherein each bit assembly has a bit holder; wherein the working bit is connected to said bit holder for rotational movement one with respect to the other.