Coupling assembly for joining an implant tool to a bone implant

• US 4,677,972 A
• Filed: 02/05/1986
• Issued: 07/07/1987
• Est. Priority Date: 02/07/1985
• Status: Expired due to Term

• Current Assignee: Zimmer Technology Incorporated (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Alain Tornier
• Inventors: Tornier, Alain
• Primary Examiner(s): Rosenbaum, C. Fred
• Assistant Examiner(s): SHEDD, CHARLES W
• Application Number:
  US06/826,450
• Time in Patent Office: 517 Days
• Field of Search: 128/92 XT, 128/92, 128/92 XY, 128/92 XP, 128/92 VT, 128/92 V, 128/92 VY, 128/92 VP, 623/22
• US Class Current: 606/53
• CPC Class Codes: A61F 2/4603 for insertion or extraction of endoprosthetic joints or of accessories thereof
• CPC Class Codes: A61F 2/4609 of acetabular cups
• CPC Class Codes: A61F 2002/30331 made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2002/30387 Dovetail connection
• CPC Class Codes: A61F 2002/30426 Bayonet coupling
• CPC Class Codes: A61F 2002/30515 using a locking wedge or block
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0033 made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: B25B 15/001 characterised by material or shape of the tool bit
• CPC Class Codes: B25B 23/105 the gripping device being an integral part of the driving bit

Abstract

A quick disconnect coupling assembly for securing a bone implant to the tool for positioning the implant wherein the coupling assembly is carried by the tool and includes axially extending undercut teeth which are receivable within undercut notches formed in the peripheral face of the implant and which are locked therein by an axially reciprocating slideable shim assembly to thereby selectively unite the positioning tool to the implant.

Claims

1. A coupling assembly for securing a bone implant such as an artificial acetabulum to a tool for use in implanting the implant comprising the bone implant having an annular flange mounted thereto, said annular flange having a front face, a plurality of notches formed in spaced relationship with respect to one another in said front face of said annular flange, each of said notches having at least one undercut wall portion, the tool having a forward annular end portion having a plurality of wedge shaped teeth extending outwardly therefrom in generally parallel relationship to the axis of the tool, each of said wedge shaped teeth of the tool being of a size to be cooperatively received within said notches in said annular flange so as to create a space adjacent thereto in each notch, a plurality of shim means slideably carried by the tool adjacent each of said wedge shaped teeth so as to be axially movable with respect thereto, and means for simultaneously moving said shim means so as to enter said spaces within said notches to thereby bind each of said wedge shaped teeth within said notches and thereby lock the tool to the bone implant.

2. The coupling assembly of claim 1 in which each of said wedge shaped teeth are integrally mounted to a ring carried by the tool and extending forwardly thereof, said ring being complementary in size to the annular flange mounted to the bone implant.

3. The coupling assembly of claim 2 in which each of said notches is in the configuration of a trapezoid and wherein each of said wedge shaped teeth are also in the configuration of a trapezoid wherein the tapered walls of each trapezoidal configuration are in abutting contact with one another when said wedged shaped teeth are engaged within said notches.