US5181925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Femoral component for a knee joint prosthesis having a modular cam and stem
Assignee: Zimmer Technology Inc
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Filing: 1992-02-10
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Granted: 1993-01-26
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Expires: 2012-02-10
Abstract
Abstract A femoral component for a knee joint prosthesis having a modular cam which may be connected intraoperatively to provide posterior tibial subluxation resistance when the posterior cruciate ligament is sacrificed. The cam includes protrusions which engage with notches on the stem base to prevent rotation of the cam during use. A stem extension is connected to the stem base for clamping engagement of the cam body therebetween. A transverse opening may be formed in the stem base for providing access to the stem extension threads. The threads may then be malformed to prevent rotation of the stem extension relative to the extension.
Inventors
- 👤 Michelle L. Houston
- 👤 Kevin M. Greig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:27
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/38; A61F2/3886
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
89 words
A modular cam for selective connection to a femoral component having a pair of spaced condyles adapted to contact a tibial component in an articulating manner, said modular cam having an elongated body terminating at opposite ends, said body having means on one end for connection to said femoral component, said body configured to extend between said condyles at said opposite end and engage a portion of said tibial component during articulation of said femoral component to thereby limit movement of said femoral component relative to said tibial component.
Claim 2
Dependent Claim
89 words
A modular cam for selective connection to a femoral component having a pair of spaced condyles adapted to contact a tibial component in an articulating manner, said modular cam having an elongated body terminating at opposite ends, said body having means on one end for connection to said femoral component, said body configured to extend between said condyles at said opposite end and engage a portion of said tibial component during articulation of said femoral component to thereby limit movement of said femoral component relative to said tibial component.
Claim 3
Dependent Claim
12 words
The modular cam of claim 1 wherein said cam body is compact.
Claim 4
Dependent Claim
35 words
The cam of claim 1 wherein said body is adapted for clamping engagement between mutually cooperating portions of said femoral component such that a portion said body extends rearwardly between condyles of said femoral component.
References Cited (Backward Citations)
EP0376658A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-01-26 | 1996-07-27 | 1997-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-26 | 2000-07-27 | 2001-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-26 | 2004-07-27 | 2005-01-26 | $7700.00 | Window Closed / Lapsed |