Patent US5116338A successfully refreshed from Google Patents.
US5116338A
Expired / Lapsed
US
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Apparatus for knee prosthesis
Assignee: Howmedica Osteonics Corp
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Filing: 1991-01-24
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Granted: 1992-05-26
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Expires: 2011-01-24
Abstract
Abstract A modulator apparatus for use in the preparation of bone surfaces and the implantation of a modular total knee prosthesis in a patient, which apparatus comprises cutting guides, templates, alignment devices, a distractor and clamping instruments which provide modularity and facilitate bone resection and prosthesis implantation.
Inventors
- 👤 Matthew P. Poggie
- 👤 Peter S. Walker
- 👤 Frederick C. Ewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:50
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/46; A61F2/4603; A61F2/461; A61B; A61B17/00; A61B17/14; A61B17/15; A61B17/154; A61B17/16; A61B17/1662; A61B17/1675; A61B17/1677; A61B17/17; A61B17/1739; A61B17/1764; A61B17/1767; A61B17/02; A61B17/025; A61B17/155; A61B17/157; A61B17/158; A61B2017/0268; A61B2017/1602; A61F2/38; A61F2/3877; A61F2002/4622
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
114 words
A femoral distractor of the type to be mounted on the end of a medullary alignment rod placed within the femoral medullary canal comprising: a handle; a body having an anterior surface thereof connected to said handle, said body having a key element formed thereon for slidably receiving an end of the medullary alignment rod to align the femoral distractor with respect to the femur; a movable medial arm and lateral arm operatively connected to said body and extending posteriorly and generally parallel to a surface of said body which is generally perpendicular to the anterior surface thereof; and means mounted within said body for independently raising and lowering said medial and lateral arms.
Claim 2
Dependent Claim
114 words
A femoral distractor of the type to be mounted on the end of a medullary alignment rod placed within the femoral medullary canal comprising: a handle; a body having an anterior surface thereof connected to said handle, said body having a key element formed thereon for slidably receiving an end of the medullary alignment rod to align the femoral distractor with respect to the femur; a movable medial arm and lateral arm operatively connected to said body and extending posteriorly and generally parallel to a surface of said body which is generally perpendicular to the anterior surface thereof; and means mounted within said body for independently raising and lowering said medial and lateral arms.
Claim 3
Dependent Claim
42 words
The femoral distractor as set forth in claim 1 wherein said means mounted within said body for independently raising and lowering said medial and lateral arms is a rack and pinion mechanism operatively connected to each of said medial and lateral arms.
Claim 4
Dependent Claim
58 words
The femoral distractor as set forth in claim 2 wherein said pinion of each of said rack and pinion mechanisms is mounted on a drive shaft extending outwardly of said body with the shaft driving the medial arm extending from said body in the medial direction and the shaft driving said lateral arm extending in the lateral direction.
Claim 5
Dependent Claim
27 words
The femoral distractor as set forth in claim 3 wherein each shaft has an outer end including a turn key to enable manual rotation of said shaft.
Claim 6
Dependent Claim
32 words
The femoral distractor as set forth in claim 1 wherein said key element of said body is formed on a rail extending outwardly of said body intermediate said lateral and medial arms.
Claim 7
Dependent Claim
21 words
The femoral distractor as set forth in claim 5 wherein said rail further includes means for mounting a drill guide thereon.
Claim 8
Dependent Claim
56 words
The femoral distractor as set forth in claim 6 wherein said means for mounting said drill guide on said rail is a keyway formed outwardly of said key element from said body so that said drill guide may be mounted on said rail with the femoral distractor mounted on the end of the medullary alignment rod.
Claim 9
Dependent Claim
28 words
The femoral distractor as set forth in claim 1 wherein said handle is in the form of a pistol grip capable of being grasped with a single hand.
Claim 10
Dependent Claim
35 words
The femoral distractor as set forth in claim 8 wherein said handle has a hole therethrough to receive an alignment rod extending externally of the femur in a direction aligned with the medullary alignment rod.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-26 | 1995-11-25 | 1996-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-26 | 1999-11-25 | 2000-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-26 | 2003-11-25 | 2004-05-26 | $7700.00 | Window Closed / Lapsed |