Handle adapter for orthopedic cutting tool

Abstract

To provide a handle adapter for an orthopedic cutting tool.SOLUTION: A handle adapter for manipulating an orthopedic tool includes: a frame having a receptacle and first and second slots; a coupling assembly; and an actuation assembly. The frame has a proximal end portion and a distal end portion. The distal end portion includes the receptacle, the first and second slots, the coupling assembly and the actuation assembly. The receptacle is configured to receive a trunnion. The first slot communicates with the receptacle. The first slot can be partially formed by a first ramp and a second ramp. The second slot is separated from the first slot. The coupling assembly is received by and translates in the first and second slots. The actuation assembly is coupled to the coupling assembly and configured to drive the coupling assembly into engagement with the trunnion.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] This patent document relates generally to orthopedic surgical tools. More particularly, this patent document relates to a handle adapter for use with an orthopedic surgical tool. [Background technology]

[0002] A variety of orthopaedic surgical tools are used to cut or otherwise reshape portions of bone during orthopaedic surgical procedures. Such orthopaedic cutting tools may include broaches, reamers, files, and the like. Such cutting tools are typically manipulated by a surgeon using a handle that may be integral with the cutting tool or may be separately removable. The handle may be used to grip the surgical cutting tool during use and to apply forces to cut and reshape bone during orthopaedic surgical procedures.

[0003] In some orthopaedic procedures, it may be necessary to drill or ream the intramedullary canal of a bone. For example, in a hip joint replacement, it may be necessary to replace the natural femoral head with a prosthetic stem affixed within the femoral canal. The procedure for implanting the prosthetic stem may include the use of a broach or rasp to prepare the femoral shaft for receiving the prosthetic stem by contouring the femoral shaft to the overall geometry of the prosthetic stem, thereby ensuring accurate placement and a good fit. To facilitate the use of such broach or rasp tools, it may be useful to selectively detach the working portion of the tool from the handle to facilitate precise measurement of the location of the tool within the femoral shaft, to facilitate cleaning of the tool, and for other reasons. Additionally, powered drivers have been developed in recent years to drive the cutting of bone with a cutting tool. These powered drivers are coupled to a handle.

[0004] Many removable handles exist for use with cutting tools such as broaches, reamers or files. However, these are in need of improvement for a variety of reasons.

[0005] Various handles, including those designed by the present applicant, are known for use in connection with orthopaedic cutting tools. Examples include U.S. Patent Nos. 5,399,633 and 5,433,363, the disclosures of each of which are incorporated herein by reference in their entirety. The present inventors have recognized, among other things, that it would be useful to have a selectively attachable handle adapter that securely couples to an orthopaedic cutting tool. Additionally, it would be useful to disengage the handle adapter immediately after use. While known handle adapters are generally effective, there is room for improvement. For example, known handle adapters have one or more deficiencies including any of the following: improper locking that can result in undesirable disengagement from the orthopaedic cutting tool during use, loose coupling to the orthopaedic cutting tool resulting in excessive wear, low levels of kinematics leading to loading of linkage components that cannot support extraction forces, inability of the handle adapter to accommodate different coupling features, undesirable point loading, etc. These deficiencies can lead to undesirable wear, component failure, undesirable coupling, complete disengagement, and undesirable results. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] U.S. Pat. No. 10,667,798 [Patent Document 2] U.S. Pat. No. 11,602,359 Summary of the Invention [Problem to be solved by the invention]

[0007] With these shortcomings in mind, the present inventors have developed a handle adapter with simplified kinematics for coupling and decoupling. These simplified kinematics may include the use of linear translational motion of a coupling assembly that couples the handle adapter to the cutting tool, as opposed to the commonly used rotational engagement. The handle adapter disclosed herein further benefits from a design that bases the extraction force against a desired component, such as a frame, without passing through a linkage component. The extraction force is also based against multiple locations on the frame, rather than being generated by a single location and / or undesirable components, such as the spring of the actuation assembly. The handle adapter disclosed herein can also accommodate different trunnion designs with minimal modification of components or features. [Means for solving the problem]

[0008] The inventors have also developed a handle adapter to have a passive locking system that allows for easy stopping of the lever, reduces lever vibration, while allowing a spring force to keep the lever closed and / or the coupling assembly engaged with the cutting tool.

[0009] The following non-limiting examples detail certain aspects of the subject matter for solving the problems and providing, among other things, the advantages discussed herein.

[0010] Example 1 is a handle adapter for operating an orthopedic surgical tool, optionally comprising a frame having a proximal end portion and a distal end portion, the distal end portion including a receptacle configured to receive a trunnion of the orthopedic surgical tool, a first slot communicating with the receptacle, the first slot being partially formed by a first ramp and a second ramp, and a second slot spaced from the first slot, a coupling assembly received by the first slot and the second slot, the coupling assembly translating within the first slot and the second slot, and an actuation assembly coupled to the coupling assembly and configured to drive the coupling assembly into engagement with the trunnion.

[0011] In Example 2, the subject matter of Example 1 optionally includes the actuation assembly including a spring coupled to the lever, the spring coupled to the coupling assembly for driving the coupling assembly into engagement with the trunnion.

[0012] In Example 3, the subject matter of Example 2 includes the spring being subjected to a compressive load when the docking assembly is engaged with the trunnion.

[0013] In Example 4, the subject matter of Examples 2-3 optionally includes a locking mechanism for locking the handle in the closed position relative to the frame, the locking mechanism including a spring formed by the frame.

[0014] In Example 5, the subject matter of Examples 1 to 4 optionally includes the first ramp being angled obliquely relative to the second ramp, the first ramp being configured to pass a contact head of the coupling assembly partially inside or adjacent to a notch in the trunnion, and the second ramp being configured to engage the contact head with the trunnion inside the notch.

[0015] In Example 6, the subject matter of Examples 1 to 5 includes that the second slot is at least partially formed by a rail, and the first ramp, the second ramp and the rail act together to guide translation of the coupling assembly within each of the first slot and the second slot.

[0016] In Example 7, the subject matter of Example 6 optionally includes the first ramp, the second ramp, and the rail configured to release at least a portion of a coupling force resulting from engagement of the trunnion and the coupling assembly with the frame, thereby reducing the coupling force on the actuation assembly.

[0017] In Example 8, the subject matter of Examples 1 to 7 optionally includes the frame forming a distal end of the second slot, engagement with the distal end limiting advancement of the docking assembly along the first slot.

[0018] In Example 9, the subject matter of Examples 1 through 8 optionally includes the frame being configured as a stationary cam and the coupling assembly being configured as a follower guided by the stationary cam.

[0019] In Example 10, the subject matter of Examples 1 to 9 optionally includes the coupling assembly including a first strut, a second strut, and a linkage member extending between the first strut and the second strut, the first strut being received within the first slot and the second strut being received within the second slot, and the linkage member at least partially receiving a distal end portion of the actuation assembly.

[0020] In Example 11, the subject matter of Examples 1-10 optionally includes a proximal end portion of the frame configured to couple with a powered driver.

[0021] Example 12 is a handle adapter for operating an orthopedic surgical tool, optionally including a frame having a proximal end portion and a distal end portion, the distal end portion including a receptacle configured to receive a trunnion of the orthopedic surgical tool, a first slot communicating with the receptacle, the first slot being partially formed by a first ramp and a second ramp, and a second slot spaced from the first slot and at least partially formed by a rail; a coupling assembly received by the first slot and the second slot; and an actuation assembly configured to drivingly engage the coupling assembly to engage the trunnion, the first ramp, the second ramp, and the rail configured to release at least a portion of a coupling force resulting from engagement of the trunnion and the coupling assembly with the frame, thereby reducing a coupling force on the actuation assembly.

[0022] In Example 13, the subject matter of Example 12 optionally includes a proximal end portion of the frame configured to couple with a powered driver.

[0023] In Example 14, the subject matter of Examples 12 to 13 optionally includes the coupling assembly including a first strut, a second strut, and a linkage member extending between the first strut and the second strut, the first strut being received in the first slot and the second strut being received in the second slot, and the linkage member at least partially receiving a distal end portion of the actuation assembly.

[0024] In Example 15, the subject matter of Examples 12-14 optionally includes, wherein the second slot is configured to limit advancement of the docking assembly along the first slot.

[0025] In Example 16, the subject matter of Examples 12 to 15 optionally includes that the first ramp, the second ramp, and the rail act together to guide translation of the coupling assembly within each of the first slot and the second slot, the first ramp being configured to pass a contact head of the coupling assembly to a position adjacent to a notch in the trunnion, and the second ramp being configured to engage the contact head with the trunnion inside the notch.

[0026] Example 17 is a handle adapter for operating an orthopedic surgical tool, optionally including a frame having a proximal end portion and a distal end portion, the distal end portion including a receptacle configured to receive a trunnion of the orthopedic surgical tool, a first slot communicating with the receptacle, the first slot being partially formed by a first ramp and a second ramp, and a second slot spaced from the first slot; a coupling assembly received by the first slot and the second slot; and an actuation assembly configured to drivingly engage the coupling assembly to engage the trunnion, the first ramp configured to pass a contact head of the coupling assembly to a position adjacent a notch in the trunnion, and the second ramp configured to engage the contact head with the trunnion inside the notch.

[0027] In Example 18, the subject matter of Example 17 optionally includes the second slot being at least partially formed by a rail, and the first ramp, the second ramp and the rail acting together to guide translation of the coupling assembly within each of the first slot and the second slot.

[0028] In Example 19, the subject matter of Examples 17 to 18 optionally includes the first ramp being configured to pass a contact head of the coupling assembly to a position adjacent a notch in the trunnion, and the second ramp being configured to engage the contact head with the trunnion inside the notch.

[0029] Example 20 is a method of coupling an orthopedic surgical tool to a handle adapter, optionally including the steps of positioning a frame of the handle adapter to receive a trunnion of the orthopedic surgical tool therein, translating a coupling assembly within a first slot and a second slot of the frame, including along a first ramp and a second ramp of the first slot, and engaging the coupling assembly with the trunnion with the coupling assembly positioned on the second ramp.

[0030] Example 21 is at least one machine-readable medium including instructions that, when executed by a processing circuit, cause the processing circuit to perform operations to implement any of Examples 1 to 20.

[0031] Example 22 is an apparatus including means for implementing any one of examples 1 to 20.

[0032] Example 23 is a system for implementing any of Examples 1 to 20.

[0033] Example 24 is a method for implementing any of examples 1 to 20.

[0034] In Example 25, the handle adapter, machine-readable medium, system or method of any one of Examples 1 to 24 or any combination thereof can be configured in a manner that allows any of the listed elements or options to be freely used or selected.

[0035] In the drawings, like numbers may be used to describe like elements throughout the multiple views. Like numbers with different suffixes may be used to represent different views or features of like elements. The drawings illustrate generally, by way of example, and not by way of limitation, various embodiments discussed herein. [Brief description of the drawings]

[0036] [Figure 1] FIG. 1 is a cross-sectional view of a handle adapter coupled to a broach in accordance with at least one embodiment of the present disclosure. [Diagram 2] 2 is a perspective view of the handle adapter of FIG. 1 with some of its internal components shown in phantom in accordance with at least one embodiment of the present disclosure. [Diagram 3] FIG. 3 is a perspective view of a coupling assembly including a post and a linkage member in accordance with at least one embodiment of the present disclosure. [Figure 4] FIG. 4 is a side view of a handle adapter with portions of the initiation assembly and the coupling assembly shown in phantom in accordance with at least one embodiment of the present disclosure. [Figure 5A-5B] 5A and 5B illustrate linear translation of a docking assembly relative to a trunnion and handle adapter frame of an orthopedic surgical tool from a disengaged position in FIG. 5A to an engaged position in FIG. 5C in accordance with at least one embodiment of the present disclosure. [Fig. 5C-5D] FIG. 5C shows linear translation of the coupling assembly relative to the trunnion of the orthopedic tool and the frame of the handle adapter from the disengaged position of FIG. 5A to the engaged position of FIG. 5C according to at least one embodiment of the present disclosure, and FIG. 5D shows linear translation of the coupling assembly relative to the frame of the handle adapter to a lever locked position with the orthopedic tool removed according to at least one embodiment of the present disclosure. [Figure 6A-6B]6A and 6B show a distal end portion of another embodiment of a handle adapter in engagement with another embodiment of a trunnion of a second orthopedic surgical tool and its coupling assembly in accordance with at least one embodiment of the present disclosure. [Figure 7A] FIG. 7A illustrates actuation of the components of the handle adapter of FIGS. 6A and 6B, including actuation of a locking mechanism in accordance with at least one embodiment of the present disclosure. [Figure 7B] FIG. 7B illustrates actuation of the components of the handle adapter of FIGS. 6A and 6B, including actuation of a locking mechanism in accordance with at least one embodiment of the present disclosure. [Figure 7C] FIG. 7C illustrates actuation of the components of the handle adapter of FIGS. 6A and 6B, including actuation of a locking mechanism in accordance with at least one embodiment of the present disclosure. [Figure 7D] FIG. 7D illustrates actuation of the components of the handle adapter of FIGS. 6A and 6B, including actuation of a locking mechanism in accordance with at least one embodiment of the present disclosure. [Figure 7E] FIG. 7E illustrates actuation of the components of the handle adapter of FIGS. 6A and 6B, including actuation of a locking mechanism in accordance with at least one embodiment of the present disclosure.

[0037] Corresponding reference characters indicate corresponding parts throughout the several views. The illustrations contemplated herein depict exemplary embodiments of the present disclosure, and such illustrations should not be construed as limiting the scope of the present disclosure in any way. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0038] 1 through 7E illustrate various embodiments of a handle adapter for releasably coupling to and manipulating an orthopedic cutting tool, such as a broach. Although the embodiments described herein are shown coupled and uncoupled from a broach, it is contemplated by the present application that other tools may be used with the handle adapter embodiments of the present application. These orthopedic tools may include, but are not limited to, files, awls, reamers, angle drivers, twist drills, flexible drills, cannulated drills, bayonet drills, bayonet taps, drill guides, adjustable angle drill guides, taps, and cannulated taps.

[0039] 1 illustrates a cross-sectional view of a handle adapter 100 according to one embodiment. The handle adapter 100 is shown coupled to an orthopaedic surgical tool 102 (also shown in cross-section) having a trunnion 103. The handle adapter 100 can include a frame 104, a coupling assembly 106, and an actuation assembly 108. The frame 104 can include a proximal end portion 110, an intermediate portion 112, a distal end portion 114, a receptacle 116, and a recess 118.

[0040] 1 shows the handle adapter 100 in mating engagement with an orthopaedic surgical tool 102 via a mating assembly 106. More specifically, the frame 104 may be configured to receive a trunnion 103 of the orthopaedic surgical tool 102 via a receptacle 116 at a distal end portion 114. Once received within the receptacle 116, the trunnion 103 may be selectively engaged by and held in place with the mating assembly 106 as it is driven by the actuation assembly 108.

[0041] 1, the frame 104 has an elongated length extending from a proximal end portion 110, an intermediate portion 112 to a distal end portion 114. The proximal end portion 110 can be configured to couple with a driver (not shown), such as a powered tool that can be used to vibrate or otherwise move the handle adapter 100 and the orthopaedic tool 102 as known in the art. According to other embodiments, the proximal end portion can be configured for manual operation, such as by including a strike plate or other features. The frame 104 can have a one-piece construction, with the proximal end portion 110 being integrally formed with the intermediate portion 112 and the distal end portion 114.

[0042] The intermediate portion 112 may include one or more walls (not shown) surrounding a recess 118. The recess 118 may extend to the distal end portion 114. The recess 118 may house components including the coupling assembly 106 and parts of the initiation assembly 108. The initiation assembly 108 may be movably coupled to the intermediate portion 112 of the frame 104 by a first pin 120 about which a portion of the initiation assembly 108, such as a lever, may pivot. The coupling assembly 106 may be coupled to the initiation assembly 108, for example, via a second pin 122. The second pin 122 may be constrained by engagement with the frame 104 to facilitate linear movement of the initiation assembly 108 and the coupling assembly 106 relative to the frame 104, as discussed further herein. The coupling assembly 106 may engage with the distal end portion 114 of the frame 104 and may have a guided and controlled movement relative thereto, as discussed further below. In particular, the frame 104 can be configured as a stationary or fixed cam, and the coupling assembly 106 is configured as a follower (driven by the actuation assembly 108) that is guided by the stationary cam (frame 104) into coupling engagement with the orthopedic tool 102, as shown in FIG. 1.

[0043] The actuation assembly 108 may include a member 124, such as a rod, linkage bar, shaft, or spring 126, a third pin 128, and a lever 130. The member 124 may be received within the recess 118 and may be coupled to the coupling assembly 106 at its distal end. The third pin 128 may be received within the recess 118 at a proximal end of the member 124. The member 124 may be coupled to the lever 130 by the third pin 128. The lever 130 may be coupled to the frame 104 for pivotal movement by the first pin 120. Thus, the first pin 120 may include, for example, a hinge pin. The lever 130 may extend from the recess 118 on the exterior of the frame 104. The lever 130 may be configured as a handle for grasping the member 124 and actuating its movement relative to the frame 104.

[0044] The member 124 may be a linkage between the lever 130 and the coupling assembly 106. The member 124 may be a resilient component that may be deflected during operational use. Thus, the member 124 may be configured as a spring 126. The spring 126 may have a generally curved or arcuate portion between the coupling ends that receive the second pin 122 and the third pin 128, respectively. The spring 126 may be positioned such that the curved or arcuate portion is within the recess 118. The spring 126 may be under a compressive load when the coupling assembly 106 is engaged with the trunnion 103.

[0045] 2 shows a perspective view of handle adapter 100, including frame 104, with parts of actuation assembly 108 shown in phantom, including coupling assembly 106 and member 124. Orthopaedic surgical tool 102 is not shown in FIG.

[0046] 3 is a perspective view of a coupling assembly 106 according to one embodiment. The coupling assembly 106 can include a first contact head 132 configured as a first post or protrusion 134, a linkage member 136, and a coupling receptacle 138. The first contact head 132 can protrude laterally from the linkage member 136 on opposite sides thereof. The linkage member 136 can have arms 136A and 136B connected by the first contact head 132. The linkage member 136 can be configured as an open frame having arms 136A and 136B extending longitudinally in a generally spaced apart relationship. The arms 136A and 136B can be spaced apart from one another to create a recess 139 configured to receive a distal end of the member 124 (not shown). The arms 136A and 136B can form a coupling receptacle 138 at their proximal end portions. The mating receptacle 138 may be configured to receive the second pin 122 (FIG. 1) therein, for example, as further discussed and illustrated with respect to FIGS. 5A-5C.

[0047] For the coupling assembly 106, the first contact head 132 can include, for example, a first post or pin. The second pin 122 (FIG. 1) can act as the second post. The linkage member 136 can extend between the first post (first contact head 132) and the second post (second pin 122, see FIG. 1). Thus, as discussed further below with respect to FIGS. 4-5C, the first post can be received in the first slot, the second post can be received in the second slot, and the linkage member 136 can at least partially receive a distal end portion of the actuation assembly 108.

[0048] FIG. 4 illustrates the handle adapter 100 in a decoupling position relative to the orthopaedic tool 102. FIG. 4 is a side view of the handle adapter 100 with the lever 130 lifted at an angle from the frame 104 and the components of the actuation assembly 108 and coupling assembly 106, shown in dashed lines, moved out of engagement with the orthopaedic tool 102. FIG. 4 further illustrates some of the components previously discussed, including the first pin 120, the second pin 122, the member 124, and the third pin 128. FIG. 4 further illustrates that the frame 104 at the distal end portion 114 can include a first slot 140 and a second slot 142. The first slot 140 can be in communication with the receptacle 116 and is configured to receive portions of the coupling assembly 106, such as the first contact head 132. The second slot 142 is configured to receive the second pin 122 therein. The first slot 140 and the second slot 142 can together guide the linear movement of the coupling assembly 106 into and out of locking engagement with the orthopaedic tool 102. Additionally, the frame 104 defining the first slot 140 and the second slot 142 can act to relieve at least a portion of the extraction force resulting from engagement of the orthopaedic tool 102 and the coupling assembly 106 with the frame 104, thereby reducing the reaction force on the actuation assembly 108 as a result of tension between the coupling assembly 106 and the orthopaedic tool 102.

[0049] 5A to 5C show an example of linear translational movement of the coupling assembly 106 relative to the trunnion 103 of the orthopedic tool 102 and the frame 104 of the handle adapter 100 from the disengaged position of FIG. 5A (also previously shown in FIG. 4) to the engaged position of FIG. 5C.

[0050] Figures 5A-5C show a side view of the handle adapter 100 with portions of the components of the actuation assembly 108 and coupling assembly 106 shown in dashed lines as they would be covered by the frame 104. Figures 5A-5C show the distal end portion 114 with a first slot 140 and a second slot 142. The first slot 140 can accommodate the first contact head 132 and the second slot 142 can accommodate the second pin 122 therein.

[0051] 5A-5C, a portion of the frame 104 defines the first slot 140, and the frame 104 can have a first ramp 150, a transition portion 152, and a second ramp 154 ​​that define portions of the first slot 140. The first ramp 150 and the second ramp 154 ​​can form one or more edges of the first slot 140. The first ramp 150 can be angled (e.g., obliquely angled) relative to the second ramp 154. The transition portion 152 can be positioned between the first ramp 150 and the second ramp 154 ​​and can be a point or an area on the frame 104.

[0052] According to one embodiment, the first ramp 150 can be configured (oriented, angled, positioned, sized) to allow the first contact head 132 to pass through the notch 156 of the trunnion 103. In other words, the first ramp 150 can pass at least a portion of the first contact head 132 into the notch 156. Thus, the first ramp 150 can be configured to pass the first contact head 132 partially to a position within or adjacent to the notch 156 of the trunnion 103. The transition portion 152 can be positioned opposite the first engagement point of the first contact head 132 with the trunnion 103. The second ramp 154 ​​can be configured (oriented, angled, positioned, sized) to allow the first contact head 132 to incrementally engage the trunnion 103 with an increasing force as the first contact head 132 progresses further along the second ramp 154 ​​from the transition portion 152. Thus, the second ramp 154 ​​can be configured to cause the first contact head 132 to engage the trunnion 103 within the notch 156.

[0053] 5A-5C show a second slot 142 that is separable from the first slot 140 by a distal end portion 114 of the frame 104. The second slot 142 may be at least partially formed by a rail 158. The rail 158 may be formed by one or more edges of the frame 104 along the second slot 142. The rail 158 may be configured to inhibit linear movement of the actuation assembly 108 and the coupling assembly 106 as the second pin 122 is received within the second slot 142 and engages with the rail 158. The second pin 122 may be selectively advanced along the second slot 142 while inhibited from movement by the rail 158, as illustrated in FIGS. 5A-5D.

[0054] 5A shows the coupling assembly 106 moved to a disengaged position relative to the trunnion 103 of the orthopaedic tool 102. The coupling assembly 106 is moved to a position where the first contact head 132 abuts the first ramp 150 and the second pin 122 is positioned on the rail 158 at or adjacent the proximal end of the second slot 142.

[0055] 5B shows the coupling assembly 106 moved to an initial engagement position against the trunnion 103, with the first contact head 132 engaged with the trunnion 103 and resting on the transition portion 152. The second pin 122 has advanced distally along the second slot 142 on the rail 158.

[0056] 5C shows the coupling assembly 106 moved to a second engagement position relative to the trunnion 103, with the first contact head 132 engaged with the trunnion 103 and resting on the second ramp 154. The second pin 122 has progressed even further distally on the rail 158 to a position adjacent the distal end of the second slot 142. As shown in FIGS. 5A-5C, the first ramp 150, the second ramp 154 ​​and the rail 158 together guide the translation of the coupling assembly 106 within either one of the first slot 140 and the second slot 142.

[0057] 5D shows the trunnion 103 removed from being housed by the frame 104 and the coupling assembly 106 and the actuation assembly 108 moved to a locked position relative to the frame 104. The travel of the coupling assembly 106 and the actuation assembly 108, including the first contact head 132, along the first slot 140 may be limited by contact of the second pin 122 with the distal end 142A of the second slot 142. The first contact head 132 may remain on the second ramp 154. In the locked position, the lever (not shown) may be moved downwardly to a position adjacent the frame 104 (e.g., a position where the angle is zero or close to zero).

[0058] 6A and 6B show another embodiment of a handle adapter 200 that engages with a trunnion 203 of an orthopedic surgical tool 202. FIGS. 6A and 6B show a side view of the handle adapter 200 with portions of the components of the actuation assembly 108 and the coupling assembly 106 shown in dashed lines as they would be covered by the frame 204. The handle adapter 200 may include components such as the actuation assembly 108 and the coupling assembly 106 similar to those discussed above, but with a modified frame 204. The frame 204 is modified due to the different geometry of the trunnion 203, including having a notch 256 with a different geometry than that of the trunnion 103 (FIGS. 5A-5C) discussed above. The different geometry of the trunnion 203 may include, for example, a longer length and a different geometry of the notch 256.

[0059] 6A and 6B, the handle adapter 200 includes a distal end portion 214 with a first slot 240 and a second slot 242. The first slot 240 and the second slot 242 can be configured with different geometries than the first slot 140 and the second slot 142 discussed above. The first slot 240 can accommodate the first contact head 132 and the second slot 242 can accommodate the second pin 122.

[0060] The frame 204 defines a first slot 240, and the frame 204 can have a first ramp 250, a transition portion 252, and a second ramp 254 that define portions of the first slot 240. The first ramp 250 and the second ramp 254 can form one or more edges of the first slot 240. The first ramp 250 can be angled (e.g., obliquely angled) relative to the second ramp 254. The transition portion 252 can be positioned between the first ramp 250 and the second ramp 254 and can be a point or an area on the frame 204.

[0061] The first ramp 250 can be configured (oriented, angled, positioned, sized) to allow the first contact head 132 to pass through the notch 256 of the trunnion 203. For example, the first ramp 250 can be oriented substantially parallel to a surface of the trunnion 203 that forms part of the notch 256 at the opening. The first ramp 250 can pass at least a portion of the first contact head 132 into the notch 256. Thus, the first ramp 250 can be configured to pass the first contact head 132 partially to a position within or adjacent to the notch 256 of the trunnion 203. The transition portion 252 can be positioned opposite a first engagement point of the first contact head 132 with the trunnion 203. The second ramp 254 can be configured (oriented, angled, positioned, sized) to allow the first contact head 132 to incrementally engage the trunnion 203 with an increasing force as the first contact head 132 progresses further along the second ramp 254 from the transition portion 252. Thus, the second ramp 254 can be configured to cause the first contact head 132 to engage the trunnion 203 within the notch 256.

[0062] 6A and 6B, the second slot 242 may be at least partially defined by a rail 258. The rail 258 may be defined by one or more edges of the frame 204 along the second slot 242. The rail 258 may be configured to prohibit linear movement of the actuation assembly 108 and the coupling assembly 106 as the second pin 122 is received within the second slot 242 and engages the rail 258.

[0063] 6A and 6B show the coupling assembly 106, and in particular the first contact head 132 engaged with the trunnion 203. FIG. 6B shows a vector decomposition for the extraction force that occurs with such engagement during use of the orthopaedic tool 202. FIG. 6B illustrates that rather than the entire extraction force being transferred to the actuation assembly 108, and in particular the member 124, at least a portion of the extraction force resulting from coupling of the first contact head 132 with the trunnion 203 is resolved to the frame 204. Arrow (1) shows the extraction force vector from the trunnion 203 to the first contact head 132. Arrow (1a) shows the immediate release of at least a portion of this extraction force to the frame 204 at the second ramp 254. Should the first contact head 132 slide down into the transition portion 252, arrow (1b) indicates that the first contact head 132 remains engaged with the trunnion 203, thereby remaining released relative to the frame 204. The force vector indicated by arrow (1b) may generally align with the extraction force indicated by arrow (1). The force vector applied by the member 124 and actuation assembly 108 (indicated by arrow (3)) may maintain the engagement between the first contact head 132 and the trunnion 203. Force vector (2) indicates that the second pin 122 and frame 204 react the extraction force on the coupling assembly 106 such that at least a portion of the extraction force is carried by the frame 204, rather than the entire extraction force being transferred to the member 124 and actuation assembly 108.

[0064] 7A-7E show another aspect of the handle adapter 200, in particular the locking mechanism 300. The locking mechanism 300 may be used to reduce vibration of the lever 130 when actuated by a powered driver, and may maintain the lever 130 in a locked position adjacent the frame 204 and / or may maintain the coupling assembly 106 in engagement with the trunnion 203. The frame 204 and actuation assembly 108 may be modified with the locking mechanism 300.

[0065] The locking mechanism 300 can include a third slot 302, a fourth slot 304, a spring 306, a seat 308, a pin support 310, and a third pin 128. The locking mechanism 300 can be positioned in a middle or proximal portion of the frame 204 and can be positioned adjacent the recess 118 discussed above. As shown in FIG 7A, the locking mechanism 300 can be positioned to interact with a connection between the member 124 and the lever 130. FIG 7A shows portions of the coupling assembly 106 and the actuation assembly 108 in dashed lines.

[0066] As shown in FIG. 7A, the third slot 302 may be formed by the frame 204 and may extend generally laterally transversely to the longitudinal axis LA in addition to having a longitudinal extent along the longitudinal axis LA. The shape of the third slot 302 may be an arc having a first end 312 and a second end 314. The first end 312 of the third slot 302 may receive the third pin 128 when the lever 130 is in the open (disengaged) position shown in FIG. 7A. The third pin 128 may advance along the third slot 302 toward the second end 314 upon closing of the lever 130 toward an engaged position (not shown in FIG. 7A). The spring 306, the seat 308 and the pin support 310 may be disposed adjacent the second end 314 of the third slot 302. The spring 306 may be formed from the frame 204 and may, for example, define a portion of the third slot 302. However, other embodiments contemplate the spring 306 as a dedicated component separate from the frame 204.

[0067] The seat 308 may be formed by the frame 204 at a second end 314 of the third slot 302 and may further be formed on a second side by a pin support 310. The pin support 310 may be a protrusion configured to receive a portion of the third pin 128. The pin support 310 may be positioned opposite the engagement head 316 of the spring 306.

[0068] The fourth slot 304 can be formed, for example, by a distal portion of the lever 130. The fourth slot can have an elongated length and can be configured to accommodate the third pin 128. The fourth slot 304 can be generally positioned adjacent to the third slot 302 since both the third slot 302 and the fourth slot 304 accommodate the third pin 128. The fourth slot 304 allows the lever 130 to have some play / movement relative to the third pin 128. The third pin 128 can also be accommodated by an aperture or slot in the member 124, as shown in FIG. 7A.

[0069] 7B-7E show the engagement movement of the actuation assembly and the coupling assembly from the disengaged position of FIG. 7A. FIG. 7B shows the first contact head 132 moved to initially engage the trunnion 203. The third pin 128 has progressed to an intermediate position along the third slot 302 between the first end 312 and the second end 314. FIG. 7C is an enlarged view from FIG. 7B showing the vector representation of the forces (V1 from the spring 124 and V2 from the frame 204) on the third pin 128. The lever 130 does not sense the force from the member 124 (see FIG. 7A). Rather, the force from the member 124 (FIG. 7A) is resolved to the frame 204, and in particular, the force is applied against the rails that form the edges of the third slot 302. This arrangement of forces can reduce wear on the lever 130 and the lever pin 120 (FIG. 7A).

[0070] 7D shows the actuation assembly 108 and coupling assembly 106 moved to a fully engaged position with the coupling assembly 106 in contact with the trunnion 203. The lever 130 may be held against or adjacent to the frame 204 at a zero or near zero angle as shown in FIG 7D. The locking mechanism 300 acts to lock / hold the actuation assembly 108 and coupling assembly 106 in the fully engaged position. Additionally, the locking mechanism 300 acts to inhibit or reduce vibration of the lever 130 relative to the frame 204 during actuation by the powered driver.

[0071] As shown in the close-up view of FIG. 7E, in a fully engaged position with the locking mechanism 300 holding the actuation assembly 108 and the coupling assembly 106, the third pin 128 can be received in the seat 308 and engaged by the engagement head 316 and pin support 310 of the spring 306. The spring 306 can urge the third pin 128 into the seat 308. FIG. 7E shows a vector representation of the force acting on the third pin 128 in the fully engaged position. The force (S) of the spring 306 on the third pin 128 is resolved as a force (RS) into the frame 204 as shown in FIG. 7E. The force (RS) is not applied to the lever 130 but rather against the rails that form the edges of the third slot 302 in the seat 308. This reduces wear on the lever 130 and the lever pin 120 (FIG. 7A) as previously discussed.

[0072] The above detailed description includes references to the accompanying drawings, which form a part of the detailed description. The drawings show, by way of illustration, specific embodiments in which the handle assemblies and associated methods may be practiced. These embodiments are also referred to herein as "examples." Although some examples are shown and described with respect to left or right handle orientations, it should be recognized that the present disclosure is equally applicable to both left and right handles.

[0073] The above detailed description is intended to be illustrative, not limiting. For example, the above-described embodiments (or one or more elements thereof) can be used in combination with each other. Other embodiments can be used by one of ordinary skill in the art upon reviewing the above description. Similarly, various features or elements can be combined. This should not be construed as intending that an unclaimed disclosed feature is essential to any claim. Rather, inventive subject matter may reside in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description, with each claim standing on its own as a separate embodiment. The scope of the present invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

[0074] The terms "a" and "an" are used herein to include one or more, independent of any other use or instance of "at least one" or "one or more." The term "or" is used herein to mean non-exclusive or such that "A or B" includes "A but not B," "B but not A," and "A and B," unless otherwise indicated. As used herein, "anterior" means generally in a direction toward the front of the patient, "posterior" means generally in a direction toward the back of the patient, "medial" means generally in a direction toward the middle of the patient, and "lateral" means generally in a direction toward a side of the patient. The phrase "anterior / posterior direction" is used herein to include an anterior-to-posterior direction or a posterior-to-anterior direction.

[0075] In the appended claims, the terms "generally," "substantially," and "about" mean within ±15% of the recited example. The terms "including" and "in which" are used as the plain English equivalents of the respective terms "comprising" and "wherein." The terms "including" and "comprising" are open-ended terms; that is, devices, systems, kits, or methods that include elements in addition to the elements recited after such terms in a claim are still deemed to be within the scope of the claim. Moreover, in the following claims, terms such as "first," "second," and "third" are used merely as labels and are not intended to impose numerical requirements on their objects.

Claims

1. 1. A handle adapter for manipulating an orthopaedic surgical tool, comprising: A frame having a proximal end portion and a distal end portion, the distal end portion comprising: a receptacle configured to receive a trunnion of the orthopaedic surgical tool; a first slot in communication with the receptacle, the first slot being partially defined by a first ramp and a second ramp; a second slot spaced apart from the first slot; and A frame including: a coupling assembly received by the first slot and the second slot, the coupling assembly translating within the first slot and the second slot; an actuation assembly coupled to the coupling assembly and configured to drive the coupling assembly into engagement with the trunnion; Includes handle adapter.

2. The handle adapter of claim 1 , wherein the actuation assembly includes a spring coupled to a lever, the spring coupled to the coupling assembly and urging the coupling assembly into engagement with the trunnion.

3. The handle adapter of claim 2 , wherein the spring is under a compressive load when the coupling assembly is engaged with the trunnion.

4. The handle adapter of claim 2 , further comprising a locking mechanism for locking the initiation assembly in a closed position relative to the frame, the locking mechanism including a spring formed by the frame.

5. 2. The handle adapter of claim 1, wherein the first ramp is angled obliquely relative to the second ramp, the first ramp is configured to pass a contact head of the coupling assembly partially inside or adjacent a notch of the trunnion, and the second ramp is configured to engage the contact head with the trunnion inside the notch.

6. 2. The handle adapter of claim 1, wherein the second slot is at least partially defined by a rail, and the first ramp, the second ramp and the rail act together to guide translation of the coupling assembly inside the first and second slots.

7. 7. The handle adapter of claim 6, wherein the first ramp, the second ramp and the rail are configured to release at least a portion of a coupling force from engagement of the trunnion and the coupling assembly with the frame, thereby reducing the coupling force on the actuation assembly.

8. The handle adapter of claim 1 , wherein the frame forms a distal end of the second slot, engagement with the distal end limiting travel of the coupling assembly along the first slot.

9. The handle adapter of claim 1 , wherein the frame is configured as a stationary cam and the coupling assembly is configured as a follower guided by the stationary cam.

10. 2. The handle adapter of claim 1, wherein the coupling assembly includes a first post, a second post, and a linkage member extending between the first post and the second post, the first post being received within the first slot and the second post being received within the second slot, and the linkage member at least partially receiving a distal end portion of the actuation assembly.

11. The handle adapter of claim 1 , wherein the proximal end portion of the frame is configured to couple with a powered driver.

12. 1. A handle adapter for manipulating an orthopaedic surgical tool, comprising: A frame having a proximal end portion and a distal end portion, the distal end portion comprising: a receptacle configured to receive a trunnion of the orthopaedic surgical tool; a first slot in communication with the receptacle, the first slot being partially defined by a first ramp and a second ramp; a second slot spaced from the first slot and at least partially defined by a rail; and A frame including: a coupling assembly received by the first slot and the second slot; an initiation assembly configured to drivingly engage the coupling assembly into engagement with the trunnion, the first ramp, the second ramp, and the rail configured to release at least a portion of a coupling force from engagement of the trunnion and the coupling assembly with the frame, thereby reducing the coupling force on the initiation assembly; Includes handle adapter.

13. The handle adapter of claim 12 , wherein the proximal end portion of the frame is configured to couple with a powered driver.

14. 13. The handle adapter of claim 12, wherein the coupling assembly includes a first post, a second post, and a linkage member extending between the first post and the second post, the first post being received within the first slot and the second post being received within the second slot, and the linkage member at least partially receiving a distal end portion of the actuation assembly.

15. The handle adapter of claim 12 , wherein the second slot is configured to limit travel of the coupling assembly along the first slot.

16. 13. The handle adapter of claim 12, wherein the first ramp, the second ramp and the rail act together to guide translation of the coupling assembly inside the first and second slots, the first ramp configured to pass a contact head of the coupling assembly to a position adjacent a notch in the trunnion and the second ramp configured to engage the contact head with the trunnion inside the notch.

17. 1. A handle adapter for manipulating an orthopaedic surgical tool, comprising: A frame having a proximal end portion and a distal end portion, the distal end portion comprising: a receptacle configured to receive a trunnion of the orthopaedic surgical tool; a first slot in communication with the receptacle, the first slot being defined in part by a first ramp and a second ramp; a second slot spaced apart from the first slot; and A frame including: a coupling assembly received by the first slot and the second slot; an actuation assembly configured to drivingly engage the coupling assembly into engagement with the trunnion, the first ramp configured to pass a contact head of the coupling assembly into a position adjacent a notch in the trunnion and the second ramp configured to engage the contact head with the trunnion inside the notch; Includes handle adapter.

18. 18. The handle adapter of claim 17, wherein the second slot is at least partially defined by a rail, and the first ramp, the second ramp and the rail act together to guide translation of the coupling assembly inside the first and second slots.

19. 18. The handle adapter of claim 17, wherein the first ramp is configured to pass the contact head of the coupling assembly to a position adjacent the notch of the trunnion and the second ramp is configured to engage the contact head with the trunnion inside the notch.

20. 1. A method of coupling an orthopaedic surgical tool to a handle adapter, comprising: positioning a frame of the handle adapter to receive a trunnion of the orthopaedic surgical tool therein; translating a coupling assembly inside the first and second slots of the frame, the coupling assembly including translating along first and second ramps of the first slot; engaging the docking assembly with the trunnion while the docking assembly is positioned on the second ramp; The method includes:

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