US4653488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prosthetic knee implantation
Assignee: Howmedica Osteonics Corp
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Filing: 1985-11-19
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Granted: 1987-03-31
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Expires: 2005-11-19
Abstract
Abstract A prosthetic knee is implanted after cutting the femor and tibia in the proper manner with the aid of instruments which include axial alignment guides and a series of cutting jigs.
Inventors
- 👤 Robert V. Kenna
- 👤 David S. Hungerford
- 👤 Kenneth A. Krackow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:53
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/14; A61B17/15; A61B17/154; A61B17/155; A61B17/157
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
99 words
A femoral spacer/tensor jig comprising a pair of spaced parallel fixed legs, each fixed leg having a lower vertical section and an inwardly inclined upper section, a transverse bridge member joining said fixed legs together, attaching means secured to said bridge member, a pair of spaced parallel movable legs, each of said movable legs generally conforming in size and shape and hingedly secured to a respectively fixed leg, adjusting means for adjusting the spacing between each fixed leg and its respective movable leg, and a stud extending away from each fixed leg for insertion into a femoral fixation hole.
Claim 2
Dependent Claim
99 words
A femoral spacer/tensor jig comprising a pair of spaced parallel fixed legs, each fixed leg having a lower vertical section and an inwardly inclined upper section, a transverse bridge member joining said fixed legs together, attaching means secured to said bridge member, a pair of spaced parallel movable legs, each of said movable legs generally conforming in size and shape and hingedly secured to a respectively fixed leg, adjusting means for adjusting the spacing between each fixed leg and its respective movable leg, and a stud extending away from each fixed leg for insertion into a femoral fixation hole.
Claim 3
Dependent Claim
47 words
The jig of claim 1, in combination therewith, a tranverse tibial cutting jib, said transverse tibial cutting jig comprising a bar having a flat upper cutting guide surface, and complementary attaching means securing said transverse tibial cutting jig to said attaching means of said femoral spacer/tensor jig.
Claim 4
Dependent Claim
88 words
The combination of claim 2 including a rounded tibial contacting surface extending outwardly from said vertical section of each of said fixed legs, securing means on said bridge member for securement of an axial alignment guide thereto, said attaching means being an outwardly extending tongue having a non-symmetrical cross section, said complementary adjusting means being a cut-out in said bar of complementary shape to said tongue cross-section, adjustable locking means selectively securing said bar to said tongue, and a pair of vertical drill holes extending through said bar.
Claim 5
Dependent Claim
73 words
A transverse tibial cutting jig assembly comprising a bar having a flat upper cutting guide surface, a cut-out extending horizontally through said bar of non-symmetrical shape, an adjustable locking pin movable into said cut-out, a pair of vertical drill holes extending through said bar, each of said drill holes being on a different side of said cut-out, and the lower surface of said bar having an inclined planar surface at one edge thereof.
Claim 6
Dependent Claim
73 words
A transverse tibial cutting jig assembly comprising a bar having a flat upper cutting guide surface, a cut-out extending horizontally through said bar of non-symmetrical shape, an adjustable locking pin movable into said cut-out, a pair of vertical drill holes extending through said bar, each of said drill holes being on a different side of said cut-out, and the lower surface of said bar having an inclined planar surface at one edge thereof.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |