Patent Publication Number: US-11045970-B1

Title: Adjustable pocket-cutting device

Description:
CROSS-REFERENCES TO RELATED APPLICATIONS 
     This application is a Continuation-in-Part of U.S. patent application Ser. No. 15/941,857 filed Mar. 30, 2018, which claims priority to U.S. Provisional Patent Application No. 62/478,953 filed Mar. 30, 2017, the entire contents of which are incorporated herein for all purposes by this reference. 
    
    
     BACKGROUND OF INVENTION 
     Field of Invention 
     This application relates, in general, to adjustable pocket-cutting devices and more particularly to devices that include adjustable stops and guides to vary web thickness and position bores, respectively, and methods for their use. 
     Description of Related Art 
     Many cabinet and furniture products are formed from a plurality of wooden, composite or plastic members which are joined together by various fasteners, most usually wood screws. In many instances, the wood screws are positioned in screw pockets or mortises formed in the joinery member adjacent to an edge of the member, which edge is then secured to a second joinery member. For example, and with reference to  FIG. 3 , a joinery member  30  may be provided with screw pockets  32  with corresponding screw bores  33  which are dimensioned to receive wood screws therein in such a manner that the joinery member may be screwed and secured to an abutting second joinery member by the wood screws. 
     The formation of screw pockets can be accomplished using various types of equipment. Some of the most efficient ways of forming screw pockets and complementary bores are set forth in my prior U.S. Pat. Nos. 9,403,285, 6,877,536, 5,553,645, 5,063,982 and 4,603,719, the entire contents of which is incorporated herein for all purposes by this reference. 
     Woodworking is increasingly popular with weekend hobbyists and the so-called “prosumers”, that is, amateurs who purchase equipment with quality or features suitable for professional use. Woodworking equipment may run into the thousands, ten-thousands, or even hundred-thousands of dollars, and may thus be cost prohibitive even for prosumers. In addition, weekend hobbyists and prosumers may be limited to working in their garages or other small, dedicated woodshops. Accordingly, space is often at a premium, and the footprint of certain equipment dedicated to specific tasks may be excessively large for the close quarters available to many hobbyists and prosumers. 
     In light of the foregoing, it would be beneficial to have pocket-cutting devices including the features and advantages of heavy-duty woodworking equipment, while overcoming the above and other disadvantages of known pocket-cutting equipment. 
     BRIEF SUMMARY 
     One aspect of the present invention is directed to an adjustable pocket-cutting device for routing a pocket in a workpiece including: a body having a housing pivotally supporting a router assembly, a worktop mounted on the body for supporting the workpiece, wherein the housing haves an edge stop for receiving an edge of the workpiece to position the workpiece on the worktop; a router assembly having a router having a router bit for routing the pocket in the workpiece positioned on the worktop; an actuation lever assembly having an actuation lever pivotally mounted on the housing at an actuation lever pivot, the actuation lever haves a router mount for supporting the router thereon, wherein the router bit sweeps through a slot in the worktop and into the workpiece clamped against the worktop as the router assembly pivots from a retracted position to a deployed position; and stop lever assembly for adjustably limiting the sweep of the router bit into the work clamped to the worktop, the stop lever assembly having a stop lever adjustably mounted to the housing at a stop lever pivot, a stop pin extending from the stop lever through a clearance opening in the housing and across a thickness of the actuation lever, wherein the stop pin abuts against an abutment surface of the actuation lever to limit the sweep of the router bit as the router assembly pivots to the deployed position. 
     The adjustable pocket-cutting device may further include a work clamp assembly for clamping the workpiece against the worktop when positioned on the worktop. The work clamp assembly may include a clamp frame that is movable with respect to the housing, and a cam lever that is pivotally mounted on the housing. The cam lever biases the clamp frame toward the workpiece supported on the worktop when in an engaged position, and the cam lever releases the clamp frame from the workpiece when in a released position. 
     The stop lever assembly may further include a fastener for adjustably securing the stop lever relative to the housing. The stop lever assembly may further include pivoting indicia and the housing may include stationary indicia to facilitate alignment of the stop lever relative to the housing to accurately limit the sweep of the router bit. 
     The adjustable pocket-cutting device may further include a drill guide assembly for adjustably aligning a drill bit path relative to the sweep of the router bit, the drill guide assembly having a support adjustably mounted to the housing, and a collar mounted on the support, the collar having a through bore for receiving and positioning a drill bit. The drill guide assembly may further include a lock for adjustably securing the support to the housing. The collar may be axially adjustable relative to the support. 
     The stop pin may extend from the stop lever through a clearance opening in the housing and into a travel slot of the actuation lever, wherein the stop pin abuts against a proximal end of the travel slot to limit the sweep of the router bit as the router assembly pivots to the deployed position. 
     Another aspect of the present invention is directed to an adjustable pocket-cutting device for routing a pocket in a workpiece includes: a body having a housing, a worktop mounted on the body for supporting the workpiece, wherein the housing haves an edge stop for receiving an edge of the workpiece to position the workpiece on the worktop; a router assembly having a router having a router bit for routing the pocket in the workpiece positioned on the worktop; an actuation lever assembly having an actuation lever pivotally mounted on the housing at an actuation lever pivot, the actuation lever haves a router mount for pivotally supporting a router assembly relative to the actuation lever pivot such that a router bit sweeps through a slot in the worktop and into a workpiece clamped against the worktop as the router assembly pivots from a retracted position to a deployed position; and a stop lever assembly for adjustably limiting the sweep of the router bit into the work clamped to the worktop, the stop lever assembly having a stop lever adjustably mounted to the housing at a stop lever pivot, a stop pin extending from the stop lever through a clearance opening in the housing and into a travel slot of the actuation lever, wherein the stop pin abuts against a proximal end of the travel slot to limit the sweep of the router bit as the router assembly pivots to the deployed position. 
     The adjustable pocket-cutting device may further include a work clamp assembly for clamping the workpiece against the worktop when positioned on the worktop. The work clamp assembly may include a clamp frame that is movable with respect to the housing, and a cam lever that is pivotally mounted on the housing. The cam lever biases the clamp frame toward the workpiece supported on the worktop when in an engaged position, and the cam lever releases the clamp frame from the workpiece when in a released position. 
     The stop lever assembly may further include a fastener for adjustably securing the stop lever relative to the housing. The stop lever assembly may further include pivoting indicia and the housing may include stationary indicia to facilitate alignment of the stop lever relative to the housing to accurately limit the sweep of the router bit. 
     The adjustable pocket-cutting device may further include a drill guide assembly for adjustably aligning a drill bit path relative to the sweep of the router bit, the drill guide assembly having a support adjustably mounted to the housing, and a collar mounted on the support, the collar having a through bore for receiving and positioning a drill bit. The drill guide assembly may further include a lock for adjustably securing the support to the housing. The collar may be axially adjustable relative to the support. 
     The stop pin may extend from the stop lever through a clearance opening in the housing and into a travel slot of the actuation lever, wherein the stop pin abuts against a proximal end of the travel slot to limit the sweep of the router bit as the router assembly pivots to the deployed position. 
     A further aspect of the present invention is directed to an adjustable pocket-cutting device for routing a pocket in a workpiece that may include: a worktop for supporting the workpiece; an actuation lever assembly including an actuation lever that pivots with respect to the worktop about an actuation lever pivot, the actuation lever configured to support a router having a router bit such that the router bit sweeps through a slot in the worktop and into a workpiece clamped against the worktop as the actuation lever pivots from a retracted position to a deployed position; and a stop assembly for adjustably limiting pivotal movement of the actuation lever to the deployed position thereby limiting the sweep of the router bit into the work clamped to the worktop, the stop assembly including a stop lever adjustably mounted relative to the worktop, a stop member extending from the stop lever across or through the actuation lever, wherein the stop member abuts against an abutment surface of the actuation lever to adjustably limit the movement of the actuation lever to the deployed position. 
     The device may further include a work clamp assembly for clamping the workpiece against the worktop, wherein the work clamp assembly may include a clamp frame that is movable relative to the worktop, and a cam lever that is pivotally mounted relative to the worktop, wherein the cam lever biases the clamp frame toward the workpiece supported on the worktop when in an engaged position, and the cam lever releases the clamp frame from the workpiece when in a released position. 
     The work clamp assembly may include a foot adjustably supported by the clamp frame, wherein the cam lever includes an intermediate position between the released and engaged positions, whereby (i) moving the foot to abut against the workpiece when the cam lever is in the intermediate position and (ii) then moving the cam lever to the engaged position securely clamps the workpiece against the worktop when the cam lever is in the engaged position. 
     The cam lever may include (i) an engaged cam surface abutting against the clamp frame when the cam lever is in the engaged position, and (ii) an intermediate cam surface abutting against the clamp frame when the cam lever is in the intermediate position. The intermediate cam surface may extend at an angle of approximately 15° to 45° relative to the engaged cam surface. 
     The stop lever assembly may include a fastener for adjustably securing the stop lever relative to the worktop. The stop lever assembly may include a stop-indexing member for adjustably securing the stop lever relative to the worktop, the stop-indexing member affixed relative to the worktop and configured to cooperate with the stop lever to selectively and incrementally adjust the position of the stop lever relative to the worktop in a plurality of predefined positions. One of the stop lever and the stop-indexing member may include at least one tooth, and the other a plurality of teeth, wherein the stop lever may be pivoted relative to the stop-indexing member, and wherein the at least one tooth and the plurality of teeth may be selectively engaged to position the stop lever with respect to the stop-indexing member in one of a plurality of predefined increments. 
     The device may further include a drill guide assembly for adjustably aligning a drill bit path relative to the sweep of the router bit, the drill guide assembly including a guide support adjustably mounted relative to the worktop, and a collar mounted on the guide support, the collar having a through bore for receiving and positioning a drill bit. The drill guide assembly may include a lock for adjustably securing the guide support relative to the worktop. The drill guide assembly may include a guide-indexing member for adjustably securing the guide support relative to the worktop, the guide-indexing member configured to cooperate with the guide support to selectively and incrementally adjust the position of the guide support relative to the worktop in a plurality of predefined positions. 
     One of the guide support and the guide-indexing member may include at least one tooth, and the other a plurality of teeth, wherein the guide support may be moved relative to the guide-indexing member, and wherein the at least one tooth and the plurality of teeth may be selectively engaged to position the guide support with respect to the guide-indexing member in one of a plurality of predefined increments. 
     The device may further include a workpiece positioning assembly including a positioning member and a positioning bar, wherein the positioning bar is removably mounted relative to the worktop to extend laterally of the worktop, and the positioning member is adjustably mounted along the positioning bar. 
     The device may further include a housing supporting the worktop and having a wall thickness and an aperture therethrough, wherein the positioning bar has at least one transverse slot and a cross-section complementary to shape of the aperture, wherein the workpiece positioning assembly includes a spring mounted within the housing, and wherein the spring biases the positioning bar against the housing such that the transverse slot of the positioning bar engages with the wall thickness of the housing. 
     Yet another aspect of the present invention is directed to an adjustable pocket-cutting device for routing a pocket in a workpiece that may include: a worktop for supporting the workpiece; an actuation lever assembly including an actuation lever that pivots relative to the worktop about an actuation lever pivot, the actuation lever configured to support a router having a router bit such that the router bit sweeps through a slot in the worktop and into a workpiece clamped against the worktop as the actuation lever pivots from a retracted position to a deployed position; and a drill guide assembly for adjustably aligning a drill bit path relative to the sweep of the router bit, the drill guide assembly including a guide support adjustably mounted relative to the worktop, and a collar mounted on the guide support, the collar having a through bore for receiving and positioning a drill bit. 
     The drill guide assembly may include a guide-indexing member for adjustably securing the guide support relative to the worktop, the guide-indexing member affixed relative to the worktop and configured to cooperate with the guide support to selectively and incrementally adjust the position of the guide support relative to the worktop in a plurality of predefined positions. One of the guide support and the guide-indexing member may include at least one tooth, and the other a plurality of teeth, wherein the guide support may be moved relative to the guide-indexing member, and wherein the at least one tooth and the plurality of teeth may be selectively engaged to position the guide support with respect to the guide-indexing member in one of a plurality of predefined increments. 
     A still further aspect of the present invention is directed to an adjustable cutting device including a worktop for supporting a workpiece and a work clamp assembly for clamping the workpiece against the worktop. The work clamp assembly may include: a clamp frame that is movable relative to the worktop; a foot adjustably supported on the clamp frame; and a cam lever that is pivotally mounted relative to the worktop, wherein the cam lever has a released position, a predetermined intermediate position and an engaged position; whereby (i) moving the foot to abut against the workpiece when the cam lever is in the intermediate position and (ii) then moving the cam lever to the engaged position causes the clamp assembly to securely clamp the workpiece against the worktop when the cam lever is in the engaged position. 
     The cam lever may include (i) an engaged cam surface abutting against the clamp frame when the cam lever is in the engaged position, and (ii) an intermediate cam surface abutting against the clamp frame when the cam lever is in the intermediate position. The intermediate cam surface may extend at an angle of approximately 15° to 45° relative to the engaged cam surface. 
     The methods and apparatuses of the present invention have other features and advantages which will be apparent from or are set forth in more detail in the accompanying drawings, which are incorporated herein, and the following Detailed Description, which together serve to explain certain principles of the present invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of an exemplary adjustable pocket-cutting device in accordance with various aspects of the present invention. 
         FIG. 2  is a perspective view of the device of  FIG. 1  having an optional dust cover mounted, and having a workpiece clamped to a worktop, in accordance with various aspects of the present invention. 
         FIG. 3  is a bottom perspective view of the workpiece of  FIG. 2 . 
         FIG. 4  is a perspective view of the device of  FIG. 1  with a housing removed to show the relative orientation of internal components, in accordance with various aspects of the present invention. 
         FIG. 5  is a rear perspective view of the housing of the device of  FIG. 1 , in accordance with various aspects of the present invention. 
         FIG. 6  is a side view of actuation and stop levers of the device of  FIG. 1  with the actuation lever in a retracted position and in a deployed position shown in phantom, in accordance with various aspects of the present invention. 
         FIG. 7  is a side view of actuation and stop levers of the device of  FIG. 1  with the stop lever in a first position and in a second position shown in phantom, in accordance with various aspects of the present invention. 
         FIG. 8  is a central cross-sectional view of the device of  FIG. 1  showing the actuation lever and a router assembly in a retracted position, in accordance with various aspects of the present invention. 
         FIG. 9  is a central cross-sectional view of the device of  FIG. 1  with a workpiece mounted thereon, and with the actuation lever and router assembly in a deployed position, in accordance with various aspects of the present invention. 
         FIG. 10  is a central cross-sectional view of the device of  FIG. 1  with the workpiece mounted thereon and the actuation lever and router assembly in the retracted position, and with a drill assembly forming a bore in the workpiece, in accordance with various aspects of the present invention. 
         FIG. 11  is a central cross-sectional view of the device of  FIG. 1  with the workpiece mounted thereon and the actuation lever and a router assembly still in their retracted position, and the drill assembly removed showing the bore in the workpiece, in accordance with various aspects of the present invention. 
         FIG. 12  is a side perspective view of the router assembly of the device of  FIG. 1  mounted on the actuation lever, in accordance with various aspects of the present invention. 
         FIG. 13  is a side perspective view of the router assembly of the device of  FIG. 1  mounted on another actuation lever, in accordance with various aspects of the present invention. 
         FIG. 14  is a rear perspective view of another housing of similar to that device of  FIG. 5  used with the router and actuation lever of  FIG. 13 , in accordance with various aspects of the present invention. 
         FIG. 15  is a perspective view of another exemplary adjustable pocket-cutting device in accordance with various aspects of the present invention, which device is substantially similar to that shown in  FIG. 1  but including a quick-release camming assembly securing a workpiece to a worktop. 
         FIG. 16  is another perspective view of the device of  FIG. 15  with a cam lever shown in an upward release position with the workpiece removed. 
         FIG. 17  is rear perspective view of the device of  FIG. 15  with a cam lever shown in an upward release position with the workpiece removed. 
         FIG. 18  is a front view of the device of  FIG. 15  with a cam lever shown in an upward release position with the workpiece removed. 
         FIG. 19  is partial crossectional view of the device of  FIG. 15  taken along line  18 - 18  in  FIG. 18 . 
         FIG. 20A  and  FIG. 20B  are front and rear perspective views of another exemplary adjustable pocket-cutting device in accordance with various aspects of the present invention, which device is substantially similar to that shown in  FIG. 1  and  FIG. 15  but includes a three-position camming assembly, indexable stop and guide assemblies, and a workpiece positioning assembly. 
         FIG. 21A ,  FIG. 21B  and  FIG. 21C  are side views of the three-position camming assembly of  FIG. 20  with a workpiece placed therein, the camming assembly shown in respective released, intermediate and engaged positions in accordance with various aspects of the present invention. 
         FIG. 22A  is an enlarged perspective view of the stop and guide assemblies of  FIG. 20  showing their relation to the actuation lever disposed within the housing, and  FIG. 22B  is a perspective view of the housing. 
         FIG. 23A  is a perspective view of the positioning assembly mounted in the housing of  FIG. 20 , and  FIG. 23B  a perspective view of the positioning assembly removed from the housing. 
     
    
    
     DETAILED DESCRIPTION 
     Reference will now be made in detail to various embodiments of the present invention(s), examples of which are illustrated in the accompanying drawings and described below. While the invention(s) will be described in conjunction with exemplary embodiments, it will be understood that present description is not intended to limit the invention(s) to those exemplary embodiments. On the contrary, the invention(s) is/are intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims. 
     Turning now to the drawings, wherein like components are designated by like reference numerals throughout the various figures, attention is directed to  FIG. 1  which illustrates a pocket-cutting device  35  in accordance with various aspects of the present invention. 
     The pocket-cutting device generally includes a body assembly  37  for supporting the various components of the device, a work clamp assembly  39  for clamping down workpiece  30  (see  FIG. 2 ), a router assembly  40  for routing pocket  32  (see  FIG. 3 ) into the workpiece, an actuation lever assembly  42  for effecting movement of the router assembly to form the pocket, a stop lever assembly  44  for adjustably limiting movement of the router assembly to selectively adjust the distance of rounded pocket end  46  from the edge of the workpiece, and a drill guide assembly  47  (see  FIG. 4 ) for adjustably positioning bore  33  (see  FIG. 3 ) through the web. 
     The body assembly includes a housing  49  that is supported on a base  51  and is capped with a top  53 . In various embodiments, the housing is sheet metal, cut and bent into shape. For example, the profile of the housing may be cut by laser or water-jet, and the housing bent into shape, including the flaps that form edge stop  54 . For example, various metal-bending technologies may be utilized to precisely bend the housing, including but not limited to those discussed in my prior U.S. Pat. Nos. 6,481,259, 7,152,450, 7,222,511, 7,263,869, 7,350,390,7,350,390, 7,354,639, 7,354,639, and, 7,440,874, the entire contents of which is incorporated herein for all purposes by this reference. Alternatively, the profile and shape of the housing may be formed by stamping, molding, and/or other suitable fabrication means. In addition, the housing may be formed of other suitable materials, including but not limited to other metals, plastics, composites, and/or other suitable materials. The base and top may be formed of metals, plastics composites, phenolics, and/or other suitable materials that provide sufficient structural integrity to support the housing and various components therein. In various embodiments, the base and top are secured to the housing by screws, however, one will appreciate that other suitable means may be utilized. 
     In various embodiments, housing  49  includes a removable deck support  56  as shown in  FIG. 5 . The deck support includes a slot that receives tabs on housing  49  such that the deck support may be readily installed or removed to facilitate both assembly and access to internal components such as the router assembly. In various embodiments, the deck support is also sheet metal, however, one will appreciate that it may be formed of other suitable materials, including but not limited to other metals, plastics, composites, and/or other suitable materials. 
     The body also includes a worktop  58  is mounted on the housing and provides a stable surface upon which workpiece  30  may be mounted during the routing process. The worktop includes a router bit slot  60  through which a router bit may extend while routing is performed on the workpiece. 
     In various embodiments, housing  49  may include a dust cover  61  having a dust collection port  63  as shown in  FIG. 3 . The dust cover substantially encloses the inside of the housing and thereby contains dust and particulate formed during the routing process. The dust collection port is dimensioned and configured to receive a dust collection hose of a dust collection system in an otherwise conventional manner. 
     With reference to  FIG. 1 , the work clamp assembly is mounted on top  53  and includes a clamp foot  65 , a clamp actuator  67 , and a clamp knob  68 . In the illustrated embodiment, the clamp actuator is a threaded member having a lower end pivotally attached to the clamp foot and an upper end affixed to clamp knob. While shown as a threaded member threadedly extending through and axially adjustable relative to the top, one will appreciate that other clamping mechanisms may be utilized to secure workpiece  30  to worktop  53 , including, but not limited to toggle clamps, C-clamps, and/or other suitable clamping means. 
     The router assembly generally includes a router  70  that drives a router bit  72  in an otherwise conventional manner. For example, a Bosch® variable-speed fixed-corded trim router may be utilized, in which case a base provided with the router may be removed from the router, and the router mounted to the actuation lever assembly, as discussed in greater detail below. The router is supported on the lever assembly by one or more router mounts. In various embodiments two one or more router mounts  74  may be provided on the actuation lever  77 , in which each mount is a yoke having a semi-circular recess that closely matches the outer profile of router  70  (see  FIG. 12 ). And in various embodiments, the upper mount may be a yoke  74 ′ having a semi-circular recess closely matching the outer portion the router&#39;s bearing housing adjacent the router bit chuck, and the lower mount may be a tab  74 ″ that is dimensioned and configured to be received by a vent opening or other recess or notch in router  70  (see  FIG. 13 ). The upper yoke configuration serves to securely mount the router to the actuation lever and significantly reduce the moment arm and forces generated by the spinning router bit against the workpiece during a routing operation. Also, the lower tab configuration serves not only to securely mount the router to the actuation lever, but also to accurately register the position with respect to the assembly process. 
     Once in place, the router may be removably secured to the lever assembly by a router clamp  75 . In various embodiments, the router clamp may be a conventional hose clamp encircling the router and extending through mounting notches and/or apertures provided on the actuation lever. However, one will appreciate that other suitable clamping mechanisms may be utilized such as bands having quick release mechanisms, clamping flanges affixed by wingnuts, and/or other suitable clamping means. 
     With reference to  FIG. 4 , the actuation lever assembly includes actuation lever  77  that is pivotally mounted to housing  49  via an actuation lever pivot  79 , a lever knob  81  to facilitate a user in gripping and moving the lever arm, and a spring  82  that biases the lever arm to a retraced position. As the actuation lever extends parallel and in close proximity to one side of the housing, the narrow-wall configuration of the actuation lever and the housing allow for a very compact design that is not significantly wider than router assembly  40 . Such compact design provides for a woodworking device having a very small footprint and may thus be used by hobbyist and/or prosumer woodworkers even in the smallest of shop areas and/or garages. 
     In various embodiments, actuation lever  77  is plate steel or sheet metal, cut and bent into shape. For example, the profile of the lever may be cut by laser or water-jet, and a lower spring mount  84  bent at an angle to the remainder of the lever, as shown in  FIG. 4 . Again, various metal-bending technologies may be used to bend the lower spring mount, including but not limited to those discussed in my above-mentioned &#39;259, &#39;450, 511, &#39;869, &#39;390, &#39;390, &#39;639, and &#39;874 patents. Alternatively, the profile and shape of the actuation lever may be formed by stamping, molding, and/or other suitable fabrication means. In addition, the actuation lever may be formed of other suitable materials, including but not limited to other metals, plastics, composites, and/or other suitable materials. 
     The actuation lever includes a travel slot  86  extending therethrough (see, e.g.,  FIG. 12 ), which slot defines the limits of motion of the actuation lever relative to the housing, as will be discussed in greater detail below. In particular, the terminal or end walls of the travel slot serve as abutments that are monolithically formed with the actuation lever, which abutments will limit motion of the actuation lever as discussed below. One will appreciate that other suitable abutment configurations may be utilized including, but not limited to tabs bent out from the actuation lever, pins extending from the actuation lever, shoulders extending from the actuation lever, and/or other suitable abutment means. For example, the actuation lever may include abutment surfaces  87 ,  87 ′ cut into the profile of actuation lever  77  (see  FIG. 13 ), in which the forward abutment  87  simply abuts against an inside surface of the housing to limit forward motion of the actuation lever to its retracted position, and the rearward abutment  87 ′ abuts against stop pin  95 ′ to limit rearward motion of the actuation lever to its deployed position. In such embodiments, the stop aperture  96 ′ in housing  49 ′ is aligned with stop pin  95 ′ as shown in  FIG. 14 . 
     With continued reference to  FIG. 14 , in various embodiments actuation lever pivot  79  may be welded or otherwise affixed to actuation lever  77  and tapped to receive a screw or bolt. Such configuration allows the actuation lever to be pulled toward an inner surface of the housing such that the activation lever may be “preloaded” against the slide strips. 
     With reference to  FIG. 9 , a guide bushing  88  is affixed to the underside of worktop  58  to minimize flexing of the actuation lever  77  and otherwise provide lateral structural support to the actuation lever. The guide bushing may be formed of a low-friction plastic material, however, one will appreciate that bearings and other suitable bushing means may be utilized. Also, one or more low-friction slide strips  89  are mounted between the activation lever and the housing to minimize sliding friction between the two. In various embodiments, a pair of semi-circular plastic strips are mounted on an inside surface of the housing, however, one will appreciate that various low-friction surfaces may be utilized including, but not limited to adhesive backed UHMW strips (e.g., Slick Strips by ePlastics®), polyethylene tapes, acetal resin sheets (e.g., DeIrin® sheets by Dupont), and the like. 
     With reference to  FIG. 7 , the stop lever assembly includes a stop lever  91  pivotally mounted on housing  49  (see  FIG. 1 ) by a stop lever pivot  93 , a stop pin  95  extending from the stop lever through a stop pin aperture  96  in the housing, and into a travel slot  86  in actuation lever  77  across at least a portion of thickness T of the actuation lever to ensure that the stop pin abuts against the actuation lever and limit the range of motion of the actuation lever. The position of the stop pin relative to the housing may be adjusted by pivoting stop lever  91  from a first position FP to a second position SP shown in  FIG. 7 , and may be fixed in the desired position by a stop fastener  98 . In various embodiments, the stop fastener is a screw that is threadedly engaged with housing. Also in various embodiments, the stop lever is provided with adjustment indicia  100  in the form of a plurality of recesses that may be aligned with datum indicia  102  in the form of a datum hole extending through housing  49  (see, e.g.,  FIG. 1  and  FIG. 5 ). One will appreciate that the indicia may be reversed such that the datum indicia is located on the stop lever, and the adjustment indicia on the housing. Such indicia allow an operator to reliably and repeatedly adjust the stop lever to a desired position to provide a desired distance from the workpiece edge to the rounded terminal end of pocket  32 . For example, positioning stop lever  91  in the first position FP stops movement of the router assembly sooner thus limiting the sweep of router bit  72  to provide a wider “web” (i.e., the distance from the workpiece edge to the terminal end of the pocket). And positioning stop lever  91  in the second position SP allows greater movement of the router assembly thus allowing increased sweep of the router bit to provide a narrower “web”. 
     With reference to  FIG. 4 , the drill guide assembly includes a collar  103  for positioning and directing a drill bit  105  with respect to the workpiece  30  clamped down on worktop  58  (see, e.g.,  FIG. 10 ). In particular, the collar may be adjusted such that the drill bit forms a bore  33  extending from the edge of the workpiece to the rounded terminal end of pocket  32 . 
     To allow adjustment, the collar extends through a collar aperture  107  of the housing (see  FIG. 5 ) and is threadedly engaged with guide support  109  to allow axial movement toward and away from the workpiece thus allowing a user to finely adjust the depth that the drill bit may penetrate the workpiece. One will appreciate that a user may initially adjust the amount the drill bit may penetrate the workpiece with the use of an adjustable drill bit stop collar mounted on the drill bit, or by adjusting the amount the drill bit is inserted into a hand drill chuck in an otherwise conventional manner such that the drill bit stop collar or the hand drill chuck abuts against collar  103  at a desired position thereby limiting penetration of the drill bit into the workpiece. The user may then use collar  103  to finely adjust the amount of penetration by screwing the collar further into, or out from guide support  109 . 
     The drill guide assembly further includes a locking plate  110  and locking screws  112  which extend through locking screw apertures  114 ,  114 ′ (see  FIG. 5 ) and are threadedly engaged with guide support  109  such that the locking plate and the guide support sandwich housing  49  (see, e.g.,  FIG. 8 ) and can releasably secure the guide support to the housing by tightening the locking screws. The locking screw apertures are oversized with respect to the locking screws thus allowing the guide support to move up-and-down and side-to-side relative to the housing, and thus allowing such adjustment of collar  103  with respect to housing and to the workpiece clamped down on the worktop. With reference to  FIG. 5 , upper locking screw aperture  114  has square profile that is significantly larger than the respective locking screw and smaller in profile than guide support  109  and locking plate  110 , while lower locking screw aperture  114 ′ has a vertically elongated profile that is also smaller than the guide support and locking plate. Such configuration allows the drill guide assembly to slide up-and-down and side-to-side with respect to the housing while the screws are slightly loosened. 
     Turning now to  FIG. 8  through  FIG. 11 , one exemplary method of forming a screw pocket in a workpiece in accordance various aspects of the present invention can now be described. 
       FIG. 8  is a cross-sectional view of pocket-cutting device  35  showing the router assembly  40  and the actuation lever  77  in a retracted position. 
       FIG. 9  is a cross-sectional view showing a workpiece  30  clamped down on worktop  58  of pocket-cutting device  35 , with the router assembly  40  and the actuation lever  77  in a deployed position having routed pocket  32  in the workpiece. 
       FIG. 10  is a cross-sectional view showing a workpiece  30  still clamped down on worktop  58  of pocket-cutting device  35 , with the router assembly  40  and the actuation lever  77  in a retraced position thus allowing clearance for drill bit  105  to form bore  33  in the workpiece extending from the edge of the workpiece and to the routed pocket  32 . 
       FIG. 11  is a cross-sectional view similar to  FIG. 10  but with the drill bit removed from and thus showing bore  33  in workpiece  30  extending from the edge of the workpiece and to the routed pocket  32 . 
     In operation and use, if the bore is not aligned as desired within the workpiece, the user may loosen locking screws  112 , reposition the drill guide assembly  47  as desired, and retighten the locking screws. Once positioned and tightened down, the drill guide assembly allows the user to perform successive pocket forming operations with repeatable and precise positioning of bore  33 . Similarly, if the “web” thickness is not as desired, the user may loosen stop fastener  98 , reposition stop lever  91  as desired (i.e., to limit motion of actuation lever  77  as desired), and retighten the stop fastener. Once positioned and tightened down, the stop lever assembly allows the user to perform successive pocket forming operations with repeatable and precise dimensioning of the pocket web. 
     In various embodiments, as shown in  FIG. 15  to  FIG. 19 , work clamp assembly  39   a  may be provided with a quick-release camming assembly  116  for quickly and repeatably securing similarly dimensioned workpieces  30  to worktop  58 . Various aspects of work clamp assembly  39   a  are similar to the work clamp assembly described, and like reference numerals have been used to describe like components of both the work clamp assembly and the pocket-cutting device. 
     The clamp actuator  67   a  may be threadably mounted on a clamp frame  117  that is configured to move up and down relative to the worktop  58 . For example, the clamp frame may be pivotally mounted to body  37   a  by tabs  119  that extend through the rear wall of the body. The clamp frame may be biased upwardly by a clamp-frame spring  121 . For example, the clamp-frame spring may be fastened to the clamp frame  117  by a suitable fastener and have a rearward leg  123  that curves and extends downwardly through an opening in the clamp frame and against the inner rear wall of body  37   a . The clamp-frame spring may also include diverging arms  121 ′ that extend forwardly and outwardly to provide a wear surface, as will be evident below. 
     In such embodiments, clamp actuator  67   a  is threadably supported on clamp frame  117 . As shown in  FIG. 19 , the clamp actuator is threadably secured to the clamp frame by a pair of flange nuts  124 , an upper one oriented upright and extending through the top of the clamp frame, and a lower one oriented upside-down and extending through an axial stop  126  that extends horizontally through the front of the clamp frame. Hexagonal openings are provided in the top and the axial support to rotationally affix the flange nuts with respect to the clamp frame, while a flange opening  128  is provided in the front of the axial support to abut against the flange nuts and axially affix the flange nuts with respect to the clamp frame. 
     A cam lever  130  is pivotally mounted on body  37   a  by screws  131 , and the cam lever is provided with a camming surfaces  133 ,  133 ′, with the former abutting downwardly against the clamp frame when the cam lever is in its downward engaged position as shown in  FIG. 15 , and the latter abutting downwardly against the clamp frame when the cam lever is in its upward released position as shown in  FIG. 16 . One will appreciate that the radial distance of camming surface  133  is greater than that of camming surface  133 ′, such that when cam lever  130  is moved upwardly, the smaller radial distance of camming surface  133 ′ allows clamp-frame spring  121  to bias clamp frame  117  upwardly and thereby release workpiece  30  from the worktop  58 . 
     As can be seen in  FIG. 17 , clamp-frame spring  121  includes diverging arms that extend forwardly and outwardly. As the clamp-frame spring is preferably formed of hardened steel, or other material suitably stiff to provide a spring-effect, the clamp-frame spring is also suitable for providing a wear surface between moving parts. As best seen  FIG. 15  and  FIG. 16 , ends of the diverging arms extend between clamp frame  117  and cam lever  130 . Since the clamp-frame spring is formed of hardened steel, it provides a useful wear surface to lessen wear between the clamp frame and the cam surface. 
     The configuration of the illustrated camming assembly is particularly well suited for fabrication from sheet metal—each of the axial support, clamp-frame spring, clamp frame, and cam lever may be simply cut form sheet metal, and the latter bent into shape in a similar manner as described above with respect to the housing. One will appreciate that various other means may be utilized to movably mount the clamp frame to the housing and cam the clamp frame into engagement with the workpiece. 
     In operation and use, pocket-cutting device  35   a  is used in substantially the same manner as pocket-cutting device  35  discussed above. Instead of tightening workpiece  30  to the worktop solely by tightening the clamp knob by hand, clamp foot  65   a  may be brought in close proximity to the top surface of a workpiece by turning clamp knob  68   a , and clamp foot  65   a  may then be securely engaged against the workpiece by moving cam lever  130  into its downward engaged position shown in  FIG. 15 . To release the workpiece from the worktop, one need only move the cam lever into its upward released position shown in  FIG. 16 . A subsequent workpiece having the same thickness may then be positioned and secured against the worktop by simply moving cam lever  130  into its downward engaged position. Alternatively, if a subsequent workpiece has a different thickness, one may simply turn clamp knob  68   a  to account for the different thickness and then use cam lever  130  to secure the workpiece. 
     In various embodiments, as shown in  FIG. 20A  through  FIG. 21C , work clamp assembly  39   b  may be provided with a quick-release camming assembly  116   b  similar to that described above but having an additional intermediate position in which a user may quickly adjust the foot to workpieces of different thicknesses. In particular, when cam lever  130   b  is in the intermediate position ( FIG. 21B ), a user may thread clamp actuator  67   b  downward until foot  65   b  touches the workpiece, at which point the user may push the cam lever down into its engaged position ( FIG. 21C ) and securely clamp the workpiece to worktop  58   b . Such intermediate position allows the user to quickly adjust the clamping pressure of the clamp assembly by positioning the foot to abut against the workpiece with minimal force (e.g., finger tightening the foot against the workpiece). 
     The angular orientation of the engaged cam surface  133   b ′ and the intermediate cam surface  133   b ″ ensures that finger tightening in the intermediate position ( FIG. 21B ) will create a secure clamping force when a user moves the cam lever  130   b  into the engaged position ( FIG. 21C ). In various embodiments, the intermediate cam surface  133   b ″ is offset from the engaged cam surface  133   b ′ by an angle of approximately 15° to 45°, more preferably about 20° to 30°, and most preferably about 25°. 
     As shown in  FIG. 20A , foot  65   b  may be a wider member that provides more uniform pressure across the width of the workpiece. Also, clamp frame  117   b  may be modified such that it supports both flange nuts  124   b  supporting clamp actuator  67   b  (see  FIG. 21A ) without the need of a discrete axial stop (see axial stop  126  in  FIG. 19 ). Work clamp assembly  39   b  is otherwise very similar to that described above. 
     With reference to  FIG. 20B , pocket-cutting device  35   b  also includes a stop lever assembly  44   b  and a drill guide assembly  47   b  that are adjustable like those described above. In addition, the assemblies are configured to be readily indexable in accommodating workpieces of varying thickness, and in providing varying webs. In particular, assemblies  44   b  and  47   b  include mechanisms to mechanically set the assemblies in a series of predefined increments. 
     Like the stop lever described above, stop lever assembly  44   b  may include a stop lever that is pivotally mounted with respect to housing  49   b  by stop lever pivot  93   b  about axis S such that the position of stop member  95   b  may be adjusted to limit the rearward sweep of the router bit and thus define the web dimension of pocket  32  (see  FIG. 3 ). In various embodiments, the stop lever assembly may include a stop-indexing member  135  that cooperates with the stop lever to selectively and incrementally adjust the position of the stop member with respect to the housing. 
     In the illustrated embodiment, stop-indexing member  135  includes a number of teeth in a predefined increment to adjustably limit the rearward motion of activation lever  77   b  and rearward sweep of the router bit, and thus precisely set the web dimension of pocket  32  (see  FIG. 3 ). Stop lever  91   b  includes a number of cooperating teeth by which a user may selectively reposition the stop-lever teeth in predefined increments along the stop-indexing-member teeth. For example,  FIG. 20B  shows the stop-lever teeth  91 ′ engaging the lowest teeth of the stop-indexing member teeth  135 ′, thereby most limiting rearward motion of actuation lever  77   b  and, in turn, most limits the rearward sweep of the router bit to create the largest/widest pocket web. While the illustrated stop-indexing member includes more teeth than the stop lever, one will appreciate that the stop lever may have the same or greater number of teeth as the stop-indexing member, and that the stop-indexing member or the stop lever may simply have one tooth. 
     To adjust the web dimension of the pocket, a user may simply grasp and pull stop tab  137  outwardly away from housing  49   b  to disengage the teeth of stop-indexing member  135 , pivot the stop tab upwardly, and engage other teeth of the stop-indexing member as desired. Such action rotates stop lever  91   b  clockwise thus moving stop member  95   b  rearward a corresponding amount, thus allowing further rotation of activation lever  77   b  and further rearward sweep of the router bit to form a narrower pocket web. In the illustrated embodiment, repositioning the stop lever relative to the stop-indexing member upward “one tooth” represents a 2° clockwise rotation of the stop lever, and thus an additional 2° of rearward router bit sweep, thus allowing precise and repeatable adjustment of the web dimension. One will appreciate, however, that the teeth may be differently dimensioned and/or configured to provide incremental adjustment as desired. 
     Like the drill guide assembly described above, drill guide assembly  47   b  includes a collar  103   b  mounted on a guide support  109   b  that, together with locking plate  110   b  (see  FIG. 22A ), can be secured to housing  49   b  by tightening locking screw  112   b  and tightly sandwiching the housing between the guide support and locking plate in a manner similar to that described above. In various embodiments, the drill guide assembly may include a guide-indexing member  138  that cooperates with the guide support to selectively and incrementally adjust the position of the collar with respect to the housing. 
     As shown in  FIG. 20B , guide-indexing member  138  may include a number of teeth in a predefined increment to adjustably reposition collar  103  and thus drill bit  105  (see, e.g.,  FIG. 10 ) relative to worktop  58   b , thus allowing precise alignment of the drill bit relative to the pocket created by the router bit. Guide support  109   b  may include a number of cooperating teeth by which a user may selectively reposition the guide-support teeth in predefined increments along the guide-indexing-member teeth. For example,  FIG. 22B  show the guide-support teeth  109 ′ engaging the uppermost teeth to guide-indexing member teeth  138 ′, thus positing collar at its uppermost position. While the illustrated guide-indexing member includes more teeth than the guide support, one will appreciate that the guide support may have the same or greater number of teeth as the guide-indexing member, and that the guide support or the guide-indexing member may simply have one tooth. 
     To adjust collar  103  downwardly, a user may simply loosen locking screw  112   b , move guide support to the left relative to housing  49   b  and disengage the teeth of guide-indexing member  138 , move the guide support downward, and reengage other lower teeth of the guide-indexing member as desired. One will also appreciate that a user may move guide support outwardly from the housing to disengage the teeth if the locking screw is sufficiently loosened. In the illustrated embodiment, repositioning the guide support relative to the guide-indexing member downward “one tooth” represents a 1/16″ downward adjustment increment of the collar, and thus moving bore  33  a corresponding amount closer to the top of pocket  32  (see, e.g.,  FIG. 3 ). One will appreciate, however, that the teeth may be differently dimensioned and/or configured to provide incremental adjustment as desired. 
     With reference to  FIG. 22A , actuation lever pivot  79   b  and pivot axis AL extends through a fixed point on guide support  109   b  such that actuation lever  77   b  pivots about a fixed point of the guide support. With reference to  FIG. 22B , the actuation pivot extends through an elongated slot  140  in housing  49   b , and is allowed to move up and down within the slot and with respect to the housing as the guide support is adjusted up and down. Like the embodiment above, a spring  82   b  interconnects lower spring mount  84   b  with the housing as shown in  FIG. 22 ,A and biases the actuation lever  77   b  and guide support  109   b  upwardly insofar as movement of the actuation lever pivot  79   b  is allowed within elongated slot. Accordingly, when locking screw  112   b  is loosened and the guide support  109   b  is moved up and down, spring  82   b  biases the guide support upwardly thus facilitating both adjustment of the guide support by a user and positive engagement between the teeth of the guide support and the guide indexing member  138 . 
     In various embodiments and with reference to  FIG. 23A , the pocket-cutting device may include a workpiece positioner  142  to selectively adjust the lateral position of the workpiece with respect to the router bit in a fence-like manner. The workpiece positioner includes a positioning member  144  adjustably mounted along positioning bar  145  and held in position by positioning screw  147 . One will appreciate that two positioning members  144  may be provided having left and right configurations, as shown in  FIG. 23B . While the illustrated positioning member is a plate, one will appreciate that other configurations may be used. The bar is removably received in positioner apertures  149  of housing  49   b  that are complementary in shape to the cross-section of the bar. In the illustrated embodiment, the bar is square shaped, however, one will appreciate that various cross-sections may be utilized. 
     In various embodiments, positioning bar  145  may include one or more slots  151  having a width corresponding to the wall thickness of housing  49   b  whereby the positioning bar mechanically engages the housing to releasably secure the positioning bar to the housing. A positioner spring  152  may be provided to bias the positioning bar downwardly such that the one or more slots positively engage the wall thickness of the housing. To release the positioning bar from the housing, the bar may be lifted relative to the housing whereby the slots disengage from the housing walls and the bar may be pulled out of the housing. 
     For convenience in explanation and accurate definition in the appended claims, the terms “upper”, “lower”, “inside” and other relative terms are used to describe features of the exemplary embodiments with reference to the positions of such features as displayed in the figures. 
     The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously, many modifications and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and their practical application, to thereby enable others skilled in the art to make and utilize various exemplary embodiments of the present invention, as well as various alternatives and modifications thereof. It is intended that the scope of the invention be defined by the Claims appended hereto and their equivalents.