Tool drive system

A tool drive system for transferring rotational power from a rotational tool, such as a drill or ratchet, to at least one input drive shaft which then transfers the power to at least one output drive shaft. The angle of at least one input drive shaft being adjustable relative to at least one output shaft. The tool drive system comprises a round housing with an angle adjuster attached to the input shaft that assists in adjusting and locking the angle of the input shaft relative to the output shaft in an almost circular span. The input and output shafts may be positioned in a user-selected gear ratio from the input to output shafts or vice versa.

BACKGROUND

This invention relates to providing a tool drive system for transferring rotational power from at least one first driver to at least one second driver. More specifically, it relates to a tool drive system providing at least one input and, at least one output, drive shaft in which the angle of at least one drive shaft is adjustable.

Typically, a user may utilize a tool drive system such as, for example, a ratchet tool, to turn a tool attachment sized to remove a fastener such as a bolt or screw. Typically, such fasteners are located in a variety of angular positions relative to the drive tool. Removal with a tool driver that has a fixed position can result in difficult user positions and decreased leverage or limited workspace. It would be advantageous to utilize a tool driver having adjustable positions and a tool driver that would provide a choice of gearing or leverage for the user.

OBJECTS OF THE INVENTION

A primary object and feature of the present invention is to provide a tool drive system for adjusting the angles of an input shaft and at least one output shaft.

It is a further object and feature of the present invention to provide such a tool drive system that provides an increase in the leverage of the user.

It is a further object and feature of the present invention to assist in providing a speed differential between the input and output of each respective drive element.

A further primary object and feature of the present invention is to provide such a system that is efficient, inexpensive, and handy. Other objects and features of this invention will become apparent with reference to the following descriptions.

SUMMARY OF THE INVENTION

In accordance with a preferred embodiment hereof, this invention provides a tool drive system comprising, in combination: at least one rotatable first shaft comprising at least one first gear, having at least one first axis of rotation; at least one rotatable second shaft comprising at least one second gear, having at least one second axis of rotation; and movement transfer means for rotating such at least one rotatable second shaft when such at least one rotatable first shaft is rotated; wherein such movement transfer means further comprises connector means for connecting such at least one rotatable first shaft and such at least one rotatable second shaft, angle setting means for setting at least one angle between such at least one first axis of rotation and such at least one second axis of rotation, and balancing means for using opposed gear plates to balance torque transfer between such at least one first gear and such at least one second gear.

In accordance with another preferred embodiment hereof, this invention provides a tool drive system comprising, in combination: at least one rotatable first shaft comprising at least one first gear, having at least one first axis of rotation; at least one rotatable second shaft comprising at least one second gear, having at least one second axis of rotation; and movement transfer means for rotating such at least one rotatable second shaft when such at least one rotatable first shaft is rotated; wherein such movement transfer means further comprises connector means for connecting such at least one rotatable first shaft and such at least one rotatable second shaft, and angle setting means for setting at least one angle between such at least one first axis of rotation and such at least one second axis of rotation; wherein such connector means comprises, at least one bar, having at least one bar axis perpendicular to both such at least one first axis of rotation and such at least one second axis of rotation, and wherein both such at least one rotatable first shaft and such at least one rotatable second shaft are rotatably mounted to such bar.

In accordance with yet another preferred embodiment hereof, this invention provides a tool drive system comprising, in combination: at least one rotatable first shaft comprising at least one first gear, having at least one first axis of rotation; at least one rotatable second shaft comprising at least one second gear, having at least one second axis of rotation; and movement transfer means for rotating such at least one rotatable second shaft when such at least one rotatable first shaft is rotated; wherein such movement transfer means further comprises connector means for connecting such at least one rotatable first shaft and such at least one rotatable second shaft, and angle setting means for setting at least one angle between such at least one first axis of rotation and such at least one second axis of rotation; and wherein such angle setting means comprises positive locking means for positive positional locking of the at least one angle.

In accordance with still another preferred embodiment hereof, this invention provides a tool drive system comprising, in combination: at least one rotatable first shaft comprising at least one first gear, having at least one first axis of rotation; at least one rotatable second shaft comprising at least one second gear, having at least one second axis of rotation; and movement transfer means for rotating such at least one rotatable second shaft when such at least one rotatable first shaft is rotated; at least one gear plate comprising at least one first unique circular set of first gear teeth on such at least one gear plate and at least one second unique circular set of second gear teeth on such at least one gear plate; gear positioning means for positioning at least one of such at least one first gear and such at least one second gear in a gear-tooth-locking relationship with a user-selected one of such at least one first unique circular set of first gear teeth on such at least one gear plate and such at least one second unique circular set of second gear teeth on such at least one gear plate; wherein such movement transfer means further comprises connector means for connecting such at least one rotatable first shaft and such at least one rotatable second shaft, and angle setting means for setting at least one angle between such at least one first axis of rotation and such at least one second axis of rotation; and, wherein such angle setting means comprises housing means for positionally stabilizing the at least one angle.

In accordance with another preferred embodiment hereof, this invention provides a tool drive system comprising, in combination: at least one rotatable first shaft comprising at least one first gear, having at least one first axis of rotation; at least one rotatable second shaft comprising at least one second gear, having at least one second axis of rotation; and movement transfer means for rotating such at least one rotatable second shaft when such at least one rotatable first shaft is rotated; wherein such movement transfer means further comprises connector means for connecting such at least one rotatable first shaft and such at least one rotatable second shaft, angle setting means for setting at least one angle between such at least one first axis of rotation and such at least one second axis of rotation; and balancing means for using opposed gear plates to balance torque transfer between such at least one first gear and such at least one second gear; wherein such angle setting means comprises housing means for positionally stabilizing the at least one angle; and wherein such housing means comprises positive locking means for positive positional locking of the at least one angle.

In accordance with another preferred embodiment hereof, this invention provides a tool drive system comprising, in combination: at least one rotatable first shaft comprising at least one first gear, having at least one first axis of rotation; at least one rotatable second shaft comprising at least one second gear, having at least one second axis of rotation; and at least one movement transferer structured and arranged to rotate such at least one rotatable second shaft when such at least one rotatable first shaft is rotated; wherein such at least one movement transferer further comprises at least one connector structured and arranged to connect such at least one rotatable first shaft and such at least one rotatable second shaft, at least one angle setter structured and arranged to set at least one angle between such at least one first axis of rotation and such at least one second axis of rotation, and at least one balancer structured and arranged to use opposed gear plates to balance torque transfer between such at least one first gear and such at least one second gear.

It also provides such a system wherein such at least one rotatable first shaft further comprises at least two first shafts, each respective shaft comprising at least one first gear, having at least one first axis of rotation. And, it provides such a system wherein such angle setter comprises a positive lock structured and arranged to positively positionally lock the at least one angle. Further, it provides such a system wherein such at least one angle setter comprises at least one housing structured and arranged to positionally stabilize the at least one angle.

Even further, it provides such a system further comprising: at least one gear plate comprising at least one first unique circular set of first gear teeth on such at least one gear plate and at least one second unique circular set of second gear teeth on such at least one gear plate; and at least one gear positioner structured and arranged to position at least one of such at least one first gear and such at least one second gear in a gear-tooth-locking relationship with a user-selected one of such at least one first unique circular set of first gear teeth on such at least one gear plate and such at least one second unique circular set of second gear teeth on such at least one gear plate.

Still further, it provides such a system wherein such at least one connector comprises, at least one bar, having at least one bar axis perpendicular to both such at least one first axis of rotation and such at least one second axis of rotation; wherein both such at least one rotatable first shaft and such at least one rotatable second shaft are rotatably mounted to such bar. And, it provides such a system wherein such at least one angle setter comprises at least one positive lock structured and arranged to positive positionally lock the at least one angle. It also provides such a system further comprising: at least one gear plate comprising at least one first unique circular set of first gear teeth on such at least one gear plate and at least one second unique circular set of second gear teeth on such at least one gear plate; and at least one gear positioner structured and arranged to position at least one of such at least one first gear and such at least one second gear in a gear-tooth-locking relationship with a user-selected one of such at least one first unique circular set of first gear teeth on such at least one gear plate and such at least one second unique circular set of second gear teeth on such at least one gear plate; wherein such at least one angle setter comprises at least one housing structured and arranged to positionally stabilize the at least one angle.

In accordance with another preferred embodiment hereof, this invention provides a tool drive system comprising, in combination: at least one rotatable first shaft comprising at least one first gear, having at least one first axis of rotation; at least one rotatable second shaft comprising at least one second gear, having at least one second axis of rotation; and at least one movement transferer structured and arranged to rotate such at least one rotatable second shaft when such at least one rotatable first shaft is rotated; wherein such at least one movement transferer further comprises at least one connector structured and arranged to connect such at least one rotatable first shaft and such at least one rotatable second shaft, and at least one angle setter structured and arranged to set at least one angle between such at least one first axis of rotation and such at least one second axis of rotation; wherein such at least one connector comprises, at least one bar, having at least one bar axis perpendicular to both such at least one first axis of rotation and such at least one second axis of rotation, and wherein both such at least one rotatable first shaft and such at least one rotatable second shaft are rotatably mounted to such bar.

Additionally, it provides such a system wherein such at least one angle setter comprises at least one positive lock structured and arranged to positive positionally lock the at least one angle. And, it provides such a system further comprising: at least one gear plate comprising at least one first unique circular set of first gear teeth on such at least one gear plate and at least one second unique circular set of second gear teeth on such at least one gear plate; at least one gear positioner structured and arranged to position at least one of such at least one first gear and such at least one second gear in a gear-tooth-locking relationship with a user-selected one of such at least one first unique circular set of first gear teeth on such at least one gear plate and such at least one second unique circular set of second gear teeth on such at least one gear plate; wherein such at least one angle setter comprises at least one housing structured and arranged to positionally stabilize the at least one angle.

In accordance with another preferred embodiment hereof, this invention provides a tool drive system comprising, in combination: at least one rotatable first shaft comprising at least one first gear, having at least one first axis of rotation; at least one rotatable second shaft comprising at least one second gear, having at least one second axis of rotation; and at least one movement transferer structured and arranged to rotate such at least one rotatable second shaft when such at least one rotatable first shaft is rotated; wherein such at least one movement transferer further comprises at least one connector structured and arranged to connect such at least one rotatable first shaft and such at least one rotatable second shaft, and at least one angle setter structured and arranged to set at least one angle between such at least one first axis of rotation and such at least one second axis of rotation wherein such at least one angle setter comprises at least one positive lock structured and arranged to positive positionally lock the at least one angle.

Moreover, it provides such a system further comprising: at least one gear plate comprising at least one first unique circular set of first gear teeth on such at least one gear plate and at least one second unique circular set of second gear teeth on such at least one gear plate; and at least one gear positioner structured and arranged to position at least one of such at least one first gear and such at least one second gear in a gear-tooth-locking relationship with a user-selected one of such at least one first unique circular set of first gear teeth on such at least one gear plate and such at least one second unique circular set of second gear teeth on such at least one gear plate; wherein such at least one angle setter comprises at least one housing structured and arranged to positionally stabilize the at least one angle.

Further, it provides such a system wherein: such at least one housing comprises a circular periphery; such circular periphery comprises a set of evenly-spaced teeth; at least one of such at least one rotatable first shaft and at least one rotatable second shaft comprises at least one shaft housing element comprising at least one shaft housing tooth structured and arranged to fit between a pair of such evenly-spaced teeth; and such at least one shaft housing tooth is removably engagable with such evenly-spaced teeth, wherein the user may set such at least one angle.

In accordance with still another preferred embodiment hereof, this invention provides a tool drive system comprising, in combination: at least one rotatable first shaft comprising at least one first gear, having at least one first axis of rotation; at least one rotatable second shaft comprising at least one second gear, having at least one second axis of rotation; at least one movement transferer structured and arranged to rotate such at least one rotatable second shaft when such at least one rotatable first shaft is rotated; at least one gear plate comprising at least one first unique circular set of first gear teeth on such at least one gear plate and at least one second unique circular set of second gear teeth on such at least one gear plate; and at least one gear positioner structured and arranged to position at least one of such at least one first gear and such at least one second gear in a gear-tooth-locking relationship with a user-selected one of such at least one first unique circular set of first gear teeth on such at least one gear plate and such at least one second unique circular set of second gear teeth on such at least one gear plate; wherein such at least one movement transferer further comprises at least one connector structured and arranged to connect such at least one rotatable first shaft and such at least one rotatable second shaft, and at least one angle setter structured and arranged to set at least one angle between such at least one first axis of rotation and such at least one second axis of rotation, and wherein such at least one angle setter comprises at least one housing structured and arranged to positionally stabilize the at least one angle.

Further, it provides such a system wherein: such at least one gear plate comprises N unique circular sets of gear teeth on such at least one gear plate; and such at least one gear positioner permits a user-selected positioning of at least one of such at least one first gear and such at least one second gear in a gear-tooth-locking relationship with a user-selected one of such N unique circular sets of gear teeth on such at least one gear plate; wherein N is a whole number greater than one. And, it provides such a system wherein such at least one angle setter comprises at least one positive lock structured and arranged to positive positionally lock the at least one angle.

Still further, it provides such a system wherein such at least one rotatable first shaft further comprises a plurality of circumferential grooves. And, it provides such a system wherein: such at least one gear positioner comprises at least one spring-loaded retractable-pin element structured and arranged to stabilize at least one longitudinal position of such at least one rotatable first shaft by entry into at least one such circumferential groove; wherein at least one longitudinal position of at least one of such at least one first gear and such at least one second gear may be user selectable; and wherein a gear ratio may be user selected.

In accordance with yet another preferred embodiment hereof, this invention provides a tool drive system comprising, in combination: at least one rotatable first shaft comprising at least one first gear, having at least one first axis of rotation; at least one rotatable second shaft comprising at least one second gear, having at least one second axis of rotation; and at least one movement transferer structured and arranged to rotate such at least one rotatable second shaft when such at least one rotatable first shaft is rotated; wherein such at least one movement transferer further comprises, at least one connector structured and arranged to connect such at least one rotatable first shaft and such at least one rotatable second shaft, at least one angle setter structured and arranged to set at least one angle between such at least one first axis of rotation and such at least one second axis of rotation, and at least one balancer structured and arranged to use opposed gear plates to balance torque transfer between such at least one first gear and such at least one second gear; wherein such at least one angle setter comprises at least one housing structured and arranged to positionally stabilize the at least one angle; and wherein such at least one housing comprises at least one positive lock structured and arranged to positively positionally lock the at least one angle.

Even further, it provides such a system further comprising: at least one gear plate comprising at least one first unique circular set of first gear teeth on such at least one gear plate and at least one second unique circular set of second gear teeth on such at least one gear plate; and at least one gear positioner structured and arranged to position at least one of such at least one first gear and such at least one second gear in a gear-tooth-locking relationship with a user-selected one of such at least one first unique circular set of first gear teeth on such at least one gear plate and such at least one second unique circular set of second gear teeth on such at least one gear plate.

And, it provides such a system wherein such at least one connector comprises, at least one bar, having at least one bar axis perpendicular to both such at least one first axis of rotation and such at least one second axis of rotation; wherein both such at least one rotatable first shaft and such at least one rotatable second shaft are rotatably mounted to such bar.

It also provides such a system wherein such at least one bar connects such housing with such at least one rotatable first shaft and such at least one rotatable second shaft. And, it provides such a system wherein: such at least one housing comprises a circular periphery; such circular periphery comprises a set of evenly-spaced teeth; at least one of such at least one rotatable first shaft and at least one rotatable second shaft comprises at least one shaft housing element comprising at least one shaft housing tooth structured and arranged to fit between a pair of such evenly-spaced teeth; and such at least one shaft housing tooth is removably engagable with such evenly-spaced teeth, wherein the user may set such at least one angle.

Reference is now made to the drawings.FIG. 1is a perspective view of the tool drive system100according to a preferred embodiment of the present invention. Preferably, the tool drive system100comprises a power transfer assembly102, as shown. Preferably, the power transfer assembly102comprises a housing104, an input shaft106, having an axis of rotation101and an output shaft108having an axis of rotation103, as shown (embodying herein movement transfer means for rotating such at least one rotatable second shaft when such at least one rotatable first shaft is rotated). Preferably, the housing104is split into two halves, half110and half112. Preferably, each respective half110and half112are connected, preferably by a connector114(embodying herein wherein such movement transfer means further comprises connector means for connecting such at least one rotatable first shaft and such at least one rotatable second shaft; and embodying herein at least one movement transferer structured and arranged to rotate such at least one rotatable second shaft when such at least one rotatable first shaft is rotated), which will be further described below. Preferably, the input shaft106and the output shaft108each comprise a tool connector116, preferably a universal connector, preferably a socket-drive connector such as, for example, a square socket driver117, as shown. Typical use in automotive situations might be, for example, a ⅜-inch diameter square socket driver117; and typical sizes for the other elements of this invention will be typically in relative proportion, as shown.

Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, etc., other universal tool connectors, may suffice. For example, many tools such as powered drills have chucks that provide for attachment of such drivers including socket-drivers, screw-drivers, etc. Furthermore, air-tool drivers also provide for assorted attachments. Even further, hand-powered tool drivers provide for assorted attachments. Many of such rotational drivers may be adapted to be used with the tool drive system100herein disclosed.

Preferably, the input shaft106is adjustable in a plurality of angular positions relative to the output shaft108, preferably along a single circumferential path, as shown. Preferably, the input shaft106comprises an angle-adjuster assembly118(embodying herein angle setting means for setting at least one angle between such at least one first axis of rotation and such at least one second axis of rotation; and, embodying herein set at least one angle between such at least one first axis of rotation and such at least one second axis of rotation), as shown. Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, durability, etc., other angle-adjusting arrangements, such as universal joints, etc., may suffice.

FIG. 2is a side view, partially in section, of the tool drive system100ofFIG. 1illustrating the angle adjustability of the input shaft106according to a preferred embodiment of the present invention.FIG. 2illustrates a preferred embodiment wherein the input shaft106has a rotatable drill120attached to the input shaft106and a socket122(for example, such as may be used to remove a spark plug124, as shown) attached to the output shaft108. Preferably, the input shaft106may be positioned in a plurality of positions, such as illustrated by position A and position B.FIG. 2illustrates such position as might be convenient to the user while still producing a rotating output shaft108to turn, for example, socket122, as shown.

Preferably, in operation, a rotation of the input shaft106results in a rotation of the output shaft108. Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, materials, durability, etc., other rotation arrangements, may suffice. For example, the input shaft106and output shaft108may be exchanged such that the input shaft106is the output shaft (and adjustable) wherein the output shaft108is the input shaft106. Preferably, such exchange also provides different gearing and leverage as will be further explained below.

FIG. 3is a side view of one-half112of the tool drive system100of FIG.1. It is noted that, preferably, each respective half110and112is a mirror image of each other (except for the connection of the input shaft106and output shaft108). For illustration,FIG. 3illustrates half112along with a center axle126, a bar which comprises connector114(seeFIG. 7for additional reference). Preferably, half112comprises a first gear130, preferably a ring gear of a specific set radius extending from the center axis of the central axle126, as shown. Preferably, half112also comprises a second gear132, preferably concentric with the first gear130, preferably also a ring gear of a specific set radius extending from the center axis of the central axle126and a set distance from first gear130, as shown. Preferably, both the first gear130and second gear132are integral, as shown (also seeFIG. 7) forming an annular ring, with a central axis127and a set of gear teeth131, as shown. Preferably, the distance each concentric ring of first gear130and second gear132are apart represents a specific gear ratio. Preferably, the first gear130and second gear132are rotatable around the central axle126. Such connection will be detailed further inFIG. 7below.

Preferably, both the input shaft106and output shaft108are connected to the central axle126. Preferably, the input shaft106is rotatable around the central axle126along a plane parallel to the concentric rings of first gear130and second gear132, as shown. Preferably, the central axle126is perpendicular to both a central axis (axis of rotation101) of the input shaft106and a central axis (axis of rotation103) of the output shaft108, as shown (embodying herein at least one bar, having at least one bar axis perpendicular to both such at least one first axis of rotation and such at least one second axis of rotation). Preferably, the input shaft106is connected to the central axle126by a yoke128, (see FIG.7). This arrangement embodies herein wherein both such at least one rotatable first shaft and such at least one rotatable second shaft are rotatably mounted to such bar. Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, material selection, etc., other mounting arrangements, may suffice.

Preferably, in the illustrated embodiment ofFIG. 3, the output shaft108is connected to half112in a fixed position, preferably using a collar115, preferably a semi-circular collar, preferably metal, preferably screwed or riveted to half112, as shown (also see FIG.7). Preferably, the output shaft108is connected to the central axle126by a yoke133(see FIG.7). Under appropriate circumstances, other arrangements may suffice. For example, the output shaft108does not necessarily have to be fixed; however, it is preferable. Further, multiple shafts may be used and only one shaft is preferably in a fixed position, as shown. Still further, it is noted the halves110and112and the shaft connections could be made on either half110or112without deterring the functions of the present invention.

Preferably, as stated above, the input shaft106is adjustable in a plurality of angular positions relative to the output shaft108and preferably comprises an angle-adjuster assembly118, as shown. Preferably, the exterior perimeter134of half110and half112comprises a set of teeth, preferably comprising a plurality of equally spaced teeth138, most preferably equally spaced squared teeth and equally spaced recesses140, preferably extending completely around the exterior perimeter134, as shown (embodying herein wherein such at least one housing comprises a circular periphery; and wherein such circular periphery comprises a set of evenly-spaced teeth). Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, torque arrangements, durability, etc., other teeth arrangements, may suffice.

Preferably, the angle-adjuster assembly118comprises a second set of teeth142, preferably made to adjoin and “lock” into the teeth136, as shown. Preferably, the angle-adjuster assembly118comprises a spring mechanism144, as shown and further described below in reference to FIG.4. The above-described arrangement embodies herein wherein at least one of such at least one rotatable first shaft and at least one rotatable second shaft comprises at least one shaft housing element comprising at least one shaft housing tooth structured and arranged to fit between a pair of such evenly-spaced teeth; and wherein such at least one shaft housing tooth is removably engagable with such evenly-spaced teeth, wherein the user may set such at least one angle.

Preferably, the input shaft106further comprises a first-shaft gear146, preferably encircling the entire circumference of the input shaft106, as shown (embodying herein at least one rotatable first shaft comprising at least one first gear, having at least one first axis of rotation). Preferably, first-shaft gear146is fixed onto input shaft106, preferably with a setscrew147, as shown. Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, technological advance, etc., other methods of fixing the first-shaft gear146onto input shaft106, may suffice. Preferably, first-shaft gear146is placed on input shaft106such that first-shaft gear146will rotate second gear132, as shown.

Preferably, the output shaft108further comprises a second-shaft gear148, preferably encircling the entire circumference of the output shaft108, as shown (embodying herein at least one rotatable second shaft comprising at least one second gear, having at least one second axis of rotation). Preferably, second-shaft gear148is fixed onto output shaft108, preferably with a setscrew149, as shown. Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, technological advance, etc., other methods of fixing the second-shaft gear148is fixed onto output shaft108, may suffice. Preferably, second-shaft gear148is placed on output shaft108such that second-shaft gear148will be rotated by first gear130, as shown.

Preferably, rotation of input shaft106rotates first-shaft gear146and causes second gear132to rotate and also first gear130to rotate. Preferably, as first gear130rotates, it rotates the second shaft gear, thereby rotating the output shaft108. Preferably, both halves110and112comprise such first gear130and second gear132, thereby assisting in balancing the power (torque) transfer equally from the first-shaft gear146to the second-shaft gear148, as shown (embodying herein balancing means for using opposed gear plates to balance torque transfer between such at least one first gear and such at least one second gear; and embodying herein at least one balancer structured and arranged to use opposed gear plates to balance torque transfer between such at least one first gear and such at least one second gear). In such manner, a rotation of the input shaft106results in a rotation of the output shaft108and vice versa.

FIG. 4is a detailed view of the angle-adjuster assembly118according to a preferred embodiment of the present invention.FIG. 4illustrates a preferred use of the angle-adjuster assembly118. Preferably, the angle-adjuster assembly comprises a housing121, as shown (embodying herein wherein such angle setting means comprises housing means for positionally stabilizing the at least one angle). Preferably, a user150pushes the upper plate152of the spring mechanism144inward toward the housing104using fingers154with enough pressure to force the spring156to retract and allowing the gear142to disengage the gear teeth136, as shown. Preferably, once the gear teeth136are disengaged, the input shaft106may be shifted to another position along the housing104(as indicated by the arrows). Preferably, the user places the angle-adjuster assembly118into a preferred position and the upper plate152is released, allowing the spring to be released and the gear142to re-engage the gear teeth136, thereby positively locking the angle-adjuster assembly118(including housing121) into place (embodying herein wherein such angle setting means comprises positive locking means for positive positional locking of the at least one angle; and embodying herein wherein such housing means comprises positive locking means for positive positional locking of the at least one angle). Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, durability, ease of manufacture, etc., other angle adjuster arrangements, may suffice. Preferably, the upper plate152has a non-slip upper surface153, preferably ribbed, as shown.

Further, it is preferred that the spring156sits adjacent a bearing assembly158that will allow the input shaft106to rotate without rotating the spring156and potentially interfering with the angle-adjuster assembly118. Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, durability, etc., other suitable spring156and bearing assembly158may be chosen without undue experimentation by those knowledgeable in the art. For example,FIG. 5is a detailed view of another angle-adjuster assembly160according to another preferred embodiment162of the present invention. Preferably, in embodiment162, the entire angle-adjuster assembly160is located along the exterior of the housing164, as shown. Preferably, there is no spring in embodiment162. Preferably, the gear teeth166are located along the exterior perimeter of the housing104, as shown. Preferably, there is a pair of locking teeth168, preferably squared locking teeth, that will fit into the gear recesses171of gear teeth166, as shown. Preferably, the locking teeth168are adjusted by using a thumbscrew tightening arrangement wherein a portion170of the input shaft172comprises threading176(allowing the input shaft172to rotate freely), as shown. Preferably, a thumbscrew178comprising an exterior shell174, preferably knurled, and internal threading (not shown) threadably attached to threading176such that rotating the thumbscrew178clockwise tightens the locking teeth168into gear teeth166and rotating the thumbscrew178counterclockwise releases the locking teeth168such that the input shaft172may be relocated to another position. Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, etc., other arrangements to relocate the input shaft172to another location, may suffice.

FIG. 6is a side view of the tool system of FIG.1.FIG. 7is a sectional view through section7-7of FIG.1. FIG.6andFIG. 7more clearly illustrate both halves110and112of the power transfer assembly102in an assembled position. As described above, each half110and112comprises a first gear130and a second gear132. Preferably, having a respective gear130and gear132on each side of the first-shaft gear146and second-shaft gear148provides stability to the input shaft106and output shaft108as they are rotated equally. Preferably, there are two first gears130, one on each respective half and mirrored to each other. And, preferably, there are two second gears132one on each respective half and mirrored to each other. Preferably, a gear plate180, preferably annular, comprises a respective set of the gears130and132, comprising first gear130and a second gear132, as shown. Preferably, a gear plate182, preferably annular, comprises another respective set of gears130and132comprising a first gear130and a second gear132, as shown. This arrangement embodies herein at least one gear plate comprising at least one first unique circular set of first gear teeth on such at least one gear plate and at least one second unique circular set of second gear teeth on such at least one gear plate.

Preferably, each respective gear plate180and gear plate182are rotatably attached to the central axle126, as shown. Preferably, each respective gear plate180and182comprises a central bearing184. Preferably, the central bearing184is located in an inner aperture186of the annular opening in the center of each respective gear plate180and182, as shown. Preferably, the central bearing184has an opening188structured and arranged to allow the central axle126to fit, and opening188is preferably round, as shown. Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, durability, etc., other bearing arrangements, may suffice.

FIG. 7illustrates a preferred method of assembly of the power transfer assembly102. Preferably, a connector114is threadably attached to a half, for example, half112, as shown. Preferably, a gear plate180is placed next to half112and adjacent yoke128and yoke133(with respective attached input shaft106and output shaft108; the input shaft106being put through the angle-adjuster assembly160and then placed onto yoke128, as shown) such that all are positioned in line with a central axis of the half112, as shown. Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, durability, manufacturing preferences, etc., other connection arrangements, may suffice.

Preferably, the central axle126is placed through the yoke128and yoke133and through a central bearing184placed in the annulus of gear180and threadably attached to the connector114, as shown. Preferably, the gear plate182and respective central bearing184are then placed over an end190of the central axle126, as shown. Preferably, the half110and another connector114are then threadably placed onto the central axle126, as shown (embodying herein wherein such at least one bar connects such housing with such at least one rotatable first shaft and such at least one rotatable second shaft). Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, durability, manufacturing preferences, etc., other connection arrangements, may suffice.

Preferably, the input shaft106and the output shaft108are attached to their respective yoke128and yoke133, preferably using a groove192in the respective shaft and a c-clip194placed in the groove, as shown. Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, durability, manufacturing preferences, etc., other attachment arrangements, may suffice. For example, a bearing may be placed at the end196of each shaft106and108to reduce frictional movement at that joint198.

Preferably, in such manner as described above, a rotating tool (such as rotatable drill120shown inFIG. 2) attached to the input shaft106and rotated will preferably turn first-shaft gear146, thereby turning gear plates180and182, which will preferably turn gear148and rotate output shaft108.

FIG. 8is a side view of one-half of the tool drive system100illustrating power transfer assembly200comprising a gear adjusting mechanism202(embodying herein gear positioning means for positioning at least one of such at least one first gear and such at least one second gear in a gear-tooth-locking relationship with a user-selected one of such at least one first unique circular set of first gear teeth on such at least one gear plate and such at least one second unique circular set of second gear teeth on such at least one gear plate; and, embodying herein at least one gear positioner structured and arranged to position at least one of such at least one first gear and such at least one second gear in a gear-tooth-locking relationship with a user-selected one of such at least one first unique circular set of first gear teeth on such at least one gear plate and such at least one second unique circular set of second gear teeth on such at least one gear plate), preferably for the output shaft204, according to another preferred embodiment of the present invention. Preferably, power transfer assembly200utilizes an input shaft206such as described for input shaft106above. However, power transfer assembly200preferably utilizes an output shaft204different from output shaft108. Preferably, output shaft204may be adjusted such that it will rotate along the same gear path as input shaft assembly206or a separate gear path, as in the embodiment of FIG.1. Preferably, in power transfer assembly200the gears208and210are closer together than in power transfer assembly102described above, to assist enabling the gear adjusting mechanism202, as shown. Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, durability, manufacturing preferences, etc., other arrangements, such as changing the gearing dimensions and spacing etc., may suffice.

FIG. 9is a detail of the gear adjusting mechanism202ofFIG. 8according to another preferred embodiment of the present invention.FIG. 10is an exploded view, partially in section, of the adjustable-gear drive shaft assembly212of the tool system of FIG.8. Preferably, the output shaft204comprises an adjustable-gear drive shaft assembly212comprising a first shaft portion214, a gear216and a second shaft portion218, preferably telescopically movable within the first shaft portion214, as shown. Preferably, first shaft portion214comprises three grooves220,221and222, as shown (embodying herein wherein such at least one rotatable first shaft further comprises a plurality of circumferential grooves). Preferably, groove(s)220,221and222define a set longitudinal positions for gear216adjacent gear208and gear210, as shown (embodying herein wherein at least one longitudinal position of at least one of such at least one first gear and such at least one second gear may be user selectable). Preferably, gear adjusting mechanism202is slidably attached to the output shaft204parallel and along each half224and226as well as affixed to each respective half224and half226(shown in FIG.11), as shown. Preferably, the gear adjusting mechanism202comprises a button release228and pair of shaft engaging mechanisms223, as shown (embodying herein wherein such at least one gear positioner comprises at least one spring-loaded retractable-pin element structured and arranged to stabilize at least one longitudinal position of such at least one rotatable first shaft by entry into at least one such circumferential groove). Preferably, gear216may be placed on either gear208or gear210, as shown. Preferably, depressing button release228releases the first shaft portion214such that it can move either towards the central axle230or toward the housing perimeter232, as shown. Preferably, movement of the first shaft portion214moves the gear216. Preferably, groove222and groove221are aligned such that gear216will be on gear208when shaft engaging mechanism223of the gear adjusting mechanism202simultaneously lock into both groove222and groove221(as shown in FIG.8). Although only two rings of gears (208and210) are shown, upon reading this specification those skilled in the art will understand that, under appropriate circumstances, depending upon how many gear ratios may be desired, upon appropriate circumstances of mechanics, space, and costs, N (a whole number over one) such rings of gears may be provided. This arrangement embodies herein wherein such at least one gear plate comprises N unique circular sets of gear teeth on such at least one gear plate; and such at least one gear positioner permits a user-selected positioning of at least one of such at least one first gear and such at least one second gear in a gear-tooth-locking relationship with a user-selected one of such N unique circular sets of gear teeth on such at least one gear plate.

Preferably, groove220and groove222are aligned such that gear216will be on gear210when shaft-engaging mechanism223of the gear adjusting mechanism202simultaneously locks into both groove220and groove222. Preferably, a user may adjust such gearing as desired and provide a one to one gear ratio by using the same gear210as the input shaft206or a different gearing by utilizing gear208(embodying herein wherein a gear ratio may be user selected). Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, durability, manufacturing preferences, etc., other gearing arrangements, may suffice.

FIG. 11is a sectional view through section11-11ofFIG. 8of a button adjusting mechanism202in a static position240according to another embodiment of the present invention.

FIG. 12is another sectional view of the button adjusting mechanism202ofFIG. 11showing a different position of buttons in an operable position260. Preferably, the gear adjusting mechanism202comprises two V-clips242and244, preferably mirrored to each other, as shown. Preferably, each respective V-clip242and244is spring tensioned towards the other V-clip by springs246, preferably equal in tension, as shown. Preferably, each respective spring246is mounted on a stop248, as shown. Preferably, each respective stop248provides a stop such that each respective V-clip242and244may only travel a set distance in an opposite direction from each other respective V-clip242or244, as shown. Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, durability, manufacturing preferences, etc., other clip arrangements, such as U-clips etc., may suffice. Preferably, each respective stop248is attached to a half226by a post250, as shown. Under appropriate circumstances, other attachment or support arrangements may suffice.

Preferably, button adjusting mechanism202further comprises a button release228, preferably situate about ninety-degrees from a longitudinal axis of each stop248such that a respective end252of each V-clip242and244is tightly adjacent an end254of the button release228, as shown. Furthermore, it is preferred that each respective end252of each V-clip242and244comprises a bearing assembly255that assists the movement of the V-clip242and244along the end254of the button release228, as shown. Preferably, each bearing assembly255comprises a spring tensioner257to maintain contact between the bearing259and an end254of the button release228, as shown. Preferably, the end254of the button release228is about forty-five degrees angled, as shown, and the end252of the V-clip242and244is also about forty-five degrees angled, as shown. Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, durability, etc., other arrangements for the button adjusting mechanism202, may suffice.

In such manner as described above and illustrated, depressing of the button release mechanism pushes each respective V-clip242and244against the respective spring246and towards stop248, preferably causing the V-clips242and244to release from the respective groove220(or221/222) and allowing movement of shaft214, as shown. Further, it is preferable that gear adjusting mechanism202is attached to each respective half224and226by attachment base plates256and258, preferably U-shaped, as shown. Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, etc., other suitable adjusting arrangements, such as other styles of button arrangements, etc., may suffice.

FIG. 13is a sectional view of another button adjusting mechanism272for the gear adjusting mechanism202ofFIG. 8, according to yet another preferred embodiment270of the present invention. In this embodiment270, the buttons272are located on a single half (half220is shown) of the power transfer assembly102, which is preferably attached to both halves224and226, as shown. Preferably, button adjusting mechanism272comprises a pair of lever-arms274which are mechanically moved in and out of the groove220or222, as shown. Preferably, such mechanical movement is accomplished by use of dual buttons272, each respective button272connected to one end276of lever-arms274, as shown. Preferably, each respective button272comprises a movable platform278, preferably spring mounted above an immovable platform280, preferably attached to a half226, as shown. Preferably, the movable platform278comprises springs282mounted on screws284, as shown. Preferably, the springs282push the movable platform278toward half224, in conjunction with a return spring290, when the buttons272are not being pushed by a user. Preferably, each respective movable platform278also comprises at least one stop286, as shown. Preferably, the immovable platform280also comprises at least one stop288, preferably aligned with stop286, as shown. Preferably, the lever-arms274are connected at pivot point292, as shown. Preferably, each respective lever-arm274comprises a return spring294(and bearing295), as shown. Under appropriate circumstances, other arrangements may suffice. Even further, preferably two pairs of button adjusting mechanism272are required to lock four lever-arms274into grooves220and222. Four button tops extending from half224are connected in pairs by external attachers, preferably thin sheet metal so that all the lever-arms274operate simultaneously. Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, etc., other connection arrangements, may suffice.

In operation, a user presses both buttons272. Preferably, when both buttons272are depressed the lever-arms274are pushed down and away from the groove220,221or222allowing movement of shaft214, as shown and described above. Upon reading the teachings of this specification, those with ordinary skill in the art will now understand that, under appropriate circumstances, considering such issues as economics, user preference, etc., other sufficient means to adjust and lock gear216into place, may suffice.

FIG. 14is a side view of one-half of the tool drive system100illustrating a three-drive-shaft embodiment300according to another preferred embodiment of the present invention. Preferably, the three-drive-shaft embodiment300comprises input shaft302, input shaft304and one output shaft306, as shown (embodying herein wherein such at least one rotatable first shaft further comprises at least two first shafts, each respective shaft comprising at least one first gear, having at least one first axis of rotation). Preferably, each respective input shaft302, input shaft304and output shaft306comprise a respective gear308,310, and312specifically connected to a respective transfer gear314,316, and318, as shown. The remaining portions of the three-drive-shaft embodiment300are similar to the two-shaft embodiment of FIG.1andFIG. 3described above. Preferably, the three-drive-shaft embodiment300provides multiple drive gear ratios without having to move an adjustable gear such as described in FIG.8. It is noted that, in light of the teachings herein, under appropriate circumstances, other combinations of gearing and drive shafts may be provided without detracting from the functions of the described embodiments.

Preferably, use of adapter400can interchange input shaft304to an output shaft for increased rotational speed.

Although applicant has described applicant's preferred embodiments of this invention, it will be understood that the broadest scope of this invention includes such modifications as diverse shapes and sizes and materials. Such scope is limited only by the below claims as read in connection with the above specification.

Further, many other advantages of applicant's invention will be apparent to those skilled in the art from the above descriptions and the below claims: