US4706660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Patellar clamp
Assignee: Zimmer Technology Inc
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Filing: 1986-04-29
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Granted: 1987-11-17
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Expires: 2006-04-29
Abstract
Abstract Disclosed herein is a patellar clamp which includes a fixed jaw having a spike centrally disposed on a part spherical surface with this spike being axially aligned with a reciprocating plunger. The plunger is operated by a second handle pivotably disposed with respect to the first handle and spring biasing means between the handles biases them in a direction of separation of the plunger and spike. The inventive patellar clamp is utilized to install a patellar button onto a resected patella.
Inventors
- 👤 Thomas D. Petersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:59
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/17; A61B17/1739; A61B17/1764; A61B17/1767; A61B17/14; A61B17/15; A61B17/154; A61B17/158; A61B17/28; A61B17/2812; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/38; A61F2/3877
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
149 words
A patellar clamp for installing a patella button on a resected posterior surface of a patella, comprising: (a) a body portion including a first handle fixedly extending therefrom, said body portion including a C-shaped structure having a bottom surface and a top opening; (b) said bottom surface having a convex surface with a fixation spike extending upwardly therefrom substantially centrally located thereon; (c) said top opening comprising one end of a linear bore through said body portion which is substantially coaxial with said fixation spike; (d) a second handle pivotably mounted to said body portion; (e) a plunger extending through said bore and including a first end facing said fixation spike and a second end with a slot receiving a distal end of said second handle; (f) whereby pivotal movement of said second handle with respect to said first handle causes linear reciprocation of said plunger in said bore.
Claim 2
Dependent Claim
149 words
A patellar clamp for installing a patella button on a resected posterior surface of a patella, comprising: (a) a body portion including a first handle fixedly extending therefrom, said body portion including a C-shaped structure having a bottom surface and a top opening; (b) said bottom surface having a convex surface with a fixation spike extending upwardly therefrom substantially centrally located thereon; (c) said top opening comprising one end of a linear bore through said body portion which is substantially coaxial with said fixation spike; (d) a second handle pivotably mounted to said body portion; (e) a plunger extending through said bore and including a first end facing said fixation spike and a second end with a slot receiving a distal end of said second handle; (f) whereby pivotal movement of said second handle with respect to said first handle causes linear reciprocation of said plunger in said bore.
Claim 3
Dependent Claim
13 words
The invention of claim 1, further including a spring interposed between said handles.
Claim 4
Dependent Claim
26 words
The invention of claim 1, wherein said plunger first end includes a head having a recess facing said fixation spike, said convex surface being part spherical.
Claim 5
Dependent Claim
16 words
The invention of claim 3, further including a seal at the periphery of said head recess.
Claim 6
Dependent Claim
22 words
The invention of claim 2, further including locking means for locking the position of said handles against the force of said spring.
Claim 7
Dependent Claim
49 words
The invention of claim 5, wherein said locking means comprises a threaded member having a first end pivotably mounted to said first handle and a second end extendable through a proximal opening in said second handle, and locking means for selectively locking said handles at a predetermined desired separation.
References Cited (Backward Citations)
US242860A
Cited
US339526A
Cited
CH90048A
Cited
GB195287A
Cited
US1667563A
Cited
US2082669A
Cited
US3605310A
Cited
US4147168A
Cited
US4285070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |