Patent US5715163A successfully refreshed from Google Patents.
US4530115A
Expired / Lapsed
US
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Shank for a prosthesis
Assignee: Protek AG
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Filing: 1983-01-03
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Granted: 1985-07-23
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Expires: 2003-01-03
Abstract
Abstract The prosthesis shank is composed of a blade which carries a joint head and a wedge-shaped end piece. The end piece is driven in along a guide in the lateral narrow side of the blade while the blade remains in a fixed position. The wedge-shaped form of the end piece permits fixation of the blade at a predetermined height such that the joint head can be at the level of the trochanter tip.
Inventors
- 👤 Maurice E. Muller
- 👤 Peter G. Niederer
- 👤 Otto Frey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:31
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30721; A61F2/30734; A61F2/32; A61F2/36; A61F2/3662; A61F2002/30001; A61F2002/30316; A61F2002/30329; A61F2002/30383; A61F2220/00; A61F2220/0025
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
73 words
A shank for a prosthesis comprising a blade having a conically widening shape extending from a distal end to a proximal end along a longitudinal median axis, said blade including a neck at said proximal end and a guide extending along one lateral narrow side thereof; and a lateral end piece having a wedge shape in the longitudinal direction slidably received in said guide and extending over the entire length of the shank.
Claim 2
Dependent Claim
73 words
A shank for a prosthesis comprising a blade having a conically widening shape extending from a distal end to a proximal end along a longitudinal median axis, said blade including a neck at said proximal end and a guide extending along one lateral narrow side thereof; and a lateral end piece having a wedge shape in the longitudinal direction slidably received in said guide and extending over the entire length of the shank.
Claim 3
Dependent Claim
47 words
A shank as set forth in claim 1 wherein a narrow lateral side of said end piece widens from said distal end to about 3/4 of the length of said shank and an opposite narrow medial side of said blade extends on a curve into said neck.
Claim 4
Dependent Claim
18 words
A shank as set forth in claim 1 wherein said guide extends in parallel to said median axis.
Claim 5
Dependent Claim
22 words
A shank as set forth in claim 3 wherein said end piece has a plurality of barb-type serrations on an outer surface.
Claim 6
Dependent Claim
22 words
A shank as set forth in claim 1 wherein said end piece has a plurality of barb-type serrations on an outer surface.
Claim 7
Dependent Claim
26 words
A shank as set forth in claim 5 wherein said serrations are arranged in two corners of said end piece along a lateral narrow side thereof.
Claim 8
Dependent Claim
27 words
A shank as set forth in claim 1 wherein said end piece has a lateral narrow side in its upper proximal region parallel to said median axis.
Claim 9
Dependent Claim
23 words
A shank as set forth in claim 1 wherein said end piece includes means at one end for engaging with an extraction tool.
Claim 10
Dependent Claim
66 words
A multi-piece shank for a prosthesis comprising a blade of concially widening shape extending from a distal end to a proximal end along a longitudinal median axis, said blade having a guide extending along a lateral narrow side thereof; and an elongated end piece slidably received in said guide and extending from said distal end, said end piece having a wedge shape in the longitudinal direction.
Claim 11
Dependent Claim
66 words
A multi-piece shank for a prosthesis comprising a blade of concially widening shape extending from a distal end to a proximal end along a longitudinal median axis, said blade having a guide extending along a lateral narrow side thereof; and an elongated end piece slidably received in said guide and extending from said distal end, said end piece having a wedge shape in the longitudinal direction.
Claim 12
Dependent Claim
23 words
A multi-piece shank as set forth in claim 9 wherein said end piece has a plurality of barb-type serrations of an outer surface.
Claim 13
Dependent Claim
23 words
A multi-piece shank as set forth in claim 10 wherein said end piece means at one end for engaging with an extraction tool.
Claim 14
Dependent Claim
31 words
A multi-piece shank as set forth in claim 9 wherein said end piece has a lateral narrow side parallel to said median axis in an upper proximal region of said blade.
Claim 15
Dependent Claim
20 words
A multi-piece shank as set forth in claim 9 wherein said end piece is of greater thickness than said blade.
Claim 16
Dependent Claim
24 words
A multi-piece shank as set forth in claim 13 wherein said end piece includes means at one end for engaging with an extraction tool.
Claim 17
Dependent Claim
40 words
A multi-piece shank as set forth in claim 9 wherein said end piece has an elongated rib slidably received in said guide and a pair of longitudinal edges overlapping said blade to retain said end piece laterally of said blade.
Claim 18
Dependent Claim
29 words
A multi-piece shank as set forth in claim 9 wherein said blade includes a neck extending at an angle to said median axis to receive a joint head thereon.
Claim 19
Independent Claim
107 words
A method of implanting a joint head of a prosthesis comprising the steps of fitting a blade having a conically widening shape along a longitudinal median axis, a neck at a proximal end to receive a joint head and a guide along a lateral narrow side within a surgically prepared spongious bone tissue of a bone; locating the center of the joint head at a predetermined point relative to the bone; and thereafter inserting an elongated wedge-shaped end piece into and along said guide to wedge the end piece and blade together within the bone tissue while retaining the blade with said center at said predetermined point.
Claim 20
Independent Claim
107 words
A method of implanting a joint head of a prosthesis comprising the steps of fitting a blade having a conically widening shape along a longitudinal median axis, a neck at a proximal end to receive a joint head and a guide along a lateral narrow side within a surgically prepared spongious bone tissue of a bone; locating the center of the joint head at a predetermined point relative to the bone; and thereafter inserting an elongated wedge-shaped end piece into and along said guide to wedge the end piece and blade together within the bone tissue while retaining the blade with said center at said predetermined point.
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) | 1988-07-22 | 1989-01-21 | 1989-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-22 | 1993-01-21 | 1993-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-22 | 1997-01-21 | 1997-07-23 | $7700.00 | Window Closed / Lapsed |