US4825857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prosthetic knee implantation
Assignee: Howmedica Osteonics Corp
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Filing: 1986-03-10
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Granted: 1989-05-02
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Expires: 2006-03-10
Abstract
Abstract A tool for use in preparing a distal femur for the implantation of a prosthetic knee includes a central section having at least one handle. A positioning pin extends outwardly from the central section. A distal femoral condyles cutting jig is selectively connected to the central section.
Inventors
- 👤 Robert V. Kenna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:51
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/14; A61B17/15; A61B17/154; A61B17/155; A61B17/157
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
103 words
A tool for use in the preparation of a distal femur for the implantation of a prosthetic knee comprising a central section, said central section having a front face and a rear face and having an upper surface between said front face and said rear face, handle means extending from said central section for facilitating rotational adjustment of said central section with respect to the distal femur, a positioning pin extending outwardly from said rear face of said central section, and means at said upper surface of said central section for selective connection of said tool with a distal femoral condyles cutting jig.
Claim 2
Dependent Claim
103 words
A tool for use in the preparation of a distal femur for the implantation of a prosthetic knee comprising a central section, said central section having a front face and a rear face and having an upper surface between said front face and said rear face, handle means extending from said central section for facilitating rotational adjustment of said central section with respect to the distal femur, a positioning pin extending outwardly from said rear face of said central section, and means at said upper surface of said central section for selective connection of said tool with a distal femoral condyles cutting jig.
Claim 3
Dependent Claim
64 words
The jig of claim 1, in combination therewith, a distal femoral condyles cutting jig, said distal femoral condyles cutting jig comprising a bar, means on said bar for cooperating with said receiving means of the distal femoral cutting jig for attachment of said distal femoral condyles cutting jig to said distal femoral cutting jig, and a generally vertical cutting guide surface on said bar.
Claim 4
Dependent Claim
29 words
A tool of claim 1 comprising attaching means on said upper surface of said central section for selective attachment of a pin holder alignment guide to said central section.
Claim 5
Dependent Claim
63 words
The jig of claim 3, in combination therewith, a pin holder alignment guide, said pin holder alignment guide including an elongated bar having an upper portion and a lower portion, complementary attaching means at the lower portion of said bar for attaching said bar to said distal femoral cutting jig, and means in said bar for selective reception of a femoral alignment pin.
Claim 6
Dependent Claim
45 words
A tool of claim 1 wherein said central section has a pair of sides extending from said rear face to said front face, and said handle means comprises lateral handle means extending laterally outward of said central section from at least one of said sides.
Claim 7
Dependent Claim
25 words
A tool of claim 5 wherein said handle means further comprises a medial handle means extending outwardly from said front face of said central section.
Claim 8
Dependent Claim
30 words
The combination of claim 2 wherein said distal femoral cutting jig handle means comprises lateral handle means extending laterally outward of said central section from at least one side thereof.
Claim 9
Dependent Claim
40 words
The combination of claim 4 wherein said elongated bar has a central vertical plane and said femoral alignment pin reception means comprises at least one set of holes extending through said bar at an angle to said central vertical plane.
Claim 10
Dependent Claim
21 words
The combination of claim 8 including three sets of said femoral holes at angles of 7° and 9° and 11°, respectively.
Claim 11
Dependent Claim
32 words
The combination of claim 8 including at least one set of holes extending through said bar at an angle to said central vertical plane for selective reception of a tibial alignment pin.
Claim 12
Dependent Claim
22 words
The combination of claim 2 wherein said distal femoral condyles cutting jig comprises pin holder alignment guide attaching means on said bar.
Claim 13
Dependent Claim
24 words
The combination of claim 2 wherein said distal femoral condyles cutting jig comprises a plurality of femoral securing pins extending downwardly from said bar.
Claim 14
Dependent Claim
20 words
The combination of claim 2 wherein said cooperating means on said bar comprises a tongue extending downwardly from said bar.
Claim 15
Dependent Claim
24 words
The combination of claim 2 wherein a plurality of vertically-extending through holes each adapted to receive a drill pin are provided in said bar.
Claim 16
Dependent Claim
45 words
A tool of claim 3 wherein said central section has a pair of sides extending from said rear face to said front face, and said handle means comprises lateral handle means extending laterally outward of said central section from at least one of said sides.
Claim 17
Dependent Claim
68 words
A tool of claim 9 wherein said means for selective connection of said tool with a distal femoral condyles cutting jig comprises a cut-out in said upper surface extending completely through said central section whereby a tongue on said distal femoral condyles cutting jig may be inserted in said cut-out, and an adjustable locking screw in said central section movable into said cut-out for pressing against the tongue.
Claim 18
Dependent Claim
33 words
A tool of claim 3 wherein said attaching means comprises a pair of holes in said upper surface whereby locking pins in the pin holder alignment guide may be inserted in said holes.
Claim 19
Dependent Claim
68 words
A tool of claim 17 wherein said means for selective connection of said tool with a distal femoral condyles cutting jig comprises a cut-out in said upper surface extending completely through said central section whereby a tongue on said distal femoral condyles cutting jig may be inserted in said cut-out, and an adjustable locking screw in said central section movable into said cut-out for pressing against the tongue.
Claim 20
Dependent Claim
53 words
A tool of claim 18 wherein said central section has a pair of sides extending from said rear face to said front face, and said handle means comprising a lateral handle extending laterally outward of each of said sides and a medial handle extending outwardly from said front face of said central section.
Claim 21
Dependent Claim
84 words
A pin holder alignment guide comprising an elongated bar, having a central vertical plane attaching means at the lower portion of said bar for selective attachment to a femoral cutting jig, a set of mirror image tibial holes extending through said bar at an angle to the central vertical plane of said bar for the selective reception of a tibial alignment pin, and a plurality of sets of mirror image femoral holes extending through said bar for selective reception of a femoral alignment pin.
Claim 22
Dependent Claim
84 words
A pin holder alignment guide comprising an elongated bar, having a central vertical plane attaching means at the lower portion of said bar for selective attachment to a femoral cutting jig, a set of mirror image tibial holes extending through said bar at an angle to the central vertical plane of said bar for the selective reception of a tibial alignment pin, and a plurality of sets of mirror image femoral holes extending through said bar for selective reception of a femoral alignment pin.
Claim 23
Dependent Claim
65 words
A distal femoral condyles cutting jig comprising a bar, a downwardly extending tongue from said bar for receptive securement to attaching means ina distal femoral cutting jig, femoral securing pins extending downwardly from said bar remote from said tongue, a generally vertical cutting guide surface on said bar between said tongue and said securing pins, and pin holder alignment guide attaching means on said bar.
Claim 24
Dependent Claim
65 words
A distal femoral condyles cutting jig comprising a bar, a downwardly extending tongue from said bar for receptive securement to attaching means ina distal femoral cutting jig, femoral securing pins extending downwardly from said bar remote from said tongue, a generally vertical cutting guide surface on said bar between said tongue and said securing pins, and pin holder alignment guide attaching means on said bar.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-01 | 1992-10-31 | 1993-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-01 | 1996-10-31 | 1997-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-01 | 2000-10-31 | 2001-05-02 | $7700.00 | Window Closed / Lapsed |