Patent US5376122A successfully refreshed from Google Patents.
US5376122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-component prosthesis with increased wall flexibility and segmented locking ridge to facilitate component assembly
Assignee: Individual
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Filing: 1992-06-17
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Granted: 1994-12-27
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Expires: 2012-06-17
Abstract
Abstract A multi-component hip joint prosthesis is provided comprising an acetabular cup and a plastic bearing liner, each of which defines a segmented open shell with an inferior segment thereof removed to provide enhanced flexibility. The enhanced flexibility substantially facilitates the assembly and disassembly of the components. The liner and the cup are retained in their assembled condition by interengagement between a plurality of ridges and at least one groove on the respective components. The plurality of independent ridges enhances the flexibility of the ridges, thereby further minimizing the assembly forces required. Interengageable keys and keyways on the respective components may be provided to prevent relative rotation therebetween. The cup may comprise a removable tab to facilitate the insertion of a tool between the cup and the liner for prying the liner from the cup if necessary.
Inventors
- 👤 Michael J. Pappas
- 👤 Frederick F. Buechel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:18
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/34; A61F2/36; A61F2/3601; A61F2/3603; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61F2002/30001; A61F2002/30316; A61F2002/30329; A61F2002/30476; A61F2002/30487; A61F2002/305; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30784; A61F2002/30787; A61F2002/30878; A61F2002/3401; A61F2002/3406; A61F2002/3429; A61F2002/3435; A61F2002/344; A61F2002/345; A61F2002/348; A61F2002/3482; A61F2220/00; A61F2220/0025
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
153 words
An orthopedic prosthesis comprising a first component having an exterior surface and a second component having an interior surface, the interior surface being dimensioned and configured to engage the exterior surface, one of said interior and exterior surfaces defining a ridge supporting surface, the other of said interior and exterior surfaces defining a ridge engaging surface, a plurality of elongate ridges, each said ridge having a first longitudinal side integral with the ridge supporting surface and a second longitudinal side spaced from the ridge supporting surface and opposed ends extending between the respective sides, said ridges being in generally end-to-end relationship with the ends of each ridge being spaced from the ends of the other of said ridges such that each of said ridge is independently resiliently deflectable, the ridge engaging surface comprising ridge engaging means for engaging each of the elongate ridges for retaining said first and second components in interengaged relationship.
Claim 2
Dependent Claim
153 words
An orthopedic prosthesis comprising a first component having an exterior surface and a second component having an interior surface, the interior surface being dimensioned and configured to engage the exterior surface, one of said interior and exterior surfaces defining a ridge supporting surface, the other of said interior and exterior surfaces defining a ridge engaging surface, a plurality of elongate ridges, each said ridge having a first longitudinal side integral with the ridge supporting surface and a second longitudinal side spaced from the ridge supporting surface and opposed ends extending between the respective sides, said ridges being in generally end-to-end relationship with the ends of each ridge being spaced from the ends of the other of said ridges such that each of said ridge is independently resiliently deflectable, the ridge engaging surface comprising ridge engaging means for engaging each of the elongate ridges for retaining said first and second components in interengaged relationship.
Claim 3
Dependent Claim
16 words
An orthopedic prosthesis as in claim 1, wherein the interior and exterior surfaces each are arcuate.
Claim 4
Dependent Claim
29 words
An orthopedic prosthesis as in claim 2, wherein each of said ridges extends along a portion of the arcuate ridge supporting surface defining an arc of between approximately 30°-60°.
Claim 5
Dependent Claim
20 words
An orthopedic prosthesis as in claim 1, wherein the ridge supporting surface is the exterior surface of the first component.
Claim 6
Dependent Claim
157 words
An orthopedic prosthesis comprising a first component having an arcuate exterior surface and a second component having an arcuate interior surface, the interior surface of said second component being dimensioned and configured to engage the exterior surface of the first component, one of the exterior and interior surfaces defining a ridge supporting surface characterized by a plurality of elongate ridges, each said ridge having one elongate side unitary with the ridge supporting surface, a second longitudinal side spaced from the ridge supporting surface, and opposed ends extending away from the ridge supporting surface and connecting the respective longitudinal sides, the ends of each ridge being spaced from the ends of each other of said ridges, such that each of said ridges is independently resiliently deflectable relative to the ridge supporting surface, the ridge engaging surface comprising means for engaging the ridges of the first component for retaining the first and second components in engagement with one another.
Claim 7
Dependent Claim
157 words
An orthopedic prosthesis comprising a first component having an arcuate exterior surface and a second component having an arcuate interior surface, the interior surface of said second component being dimensioned and configured to engage the exterior surface of the first component, one of the exterior and interior surfaces defining a ridge supporting surface characterized by a plurality of elongate ridges, each said ridge having one elongate side unitary with the ridge supporting surface, a second longitudinal side spaced from the ridge supporting surface, and opposed ends extending away from the ridge supporting surface and connecting the respective longitudinal sides, the ends of each ridge being spaced from the ends of each other of said ridges, such that each of said ridges is independently resiliently deflectable relative to the ridge supporting surface, the ridge engaging surface comprising means for engaging the ridges of the first component for retaining the first and second components in engagement with one another.
Claim 8
Dependent Claim
37 words
An orthopedic prosthesis as in claim 5, wherein the ridge supporting surface defines the exterior surface of the first component, and wherein the ridge engaging means defines a groove on the interior surface of the second component.
Claim 9
Dependent Claim
18 words
An orthopedic prosthesis as in claim 5, wherein each said ridge extends through an angle of between 30°-60°.
Claim 10
Dependent Claim
16 words
An orthopedic prosthesis as in claim 7, wherein the ridges are disposed substantially in end-to-end relation.
Claim 11
Dependent Claim
24 words
An orthopedic prosthesis as in claim 5, wherein the ridges are in a resiliently deflected condition when said first and second components are engaged.
Claim 12
Dependent Claim
143 words
An orthopedic prosthesis comprising a cup defining an open shell having a spherically generated interior surface and a liner defining an open shell having a spherically generated exterior surface, the exterior surface of the liner being dimensioned for engagement with the interior surface of the cup, the exterior surface of the liner being characterized by a plurality of elongated ridges, each said ridge having a first longitudinal side unitary with the exterior surface of the liner and a second longitudinal side spaced from the exterior surface, the first sides of said ridges lying substantially in a common plane each said ridge being independently resiliently deflectable relative to the exterior surface and relative to each other of said ridges, the cup comprising means for engagement with the ridges of the liner for retaining the cup and the liner in interengaged relation with one another.
Claim 13
Dependent Claim
143 words
An orthopedic prosthesis comprising a cup defining an open shell having a spherically generated interior surface and a liner defining an open shell having a spherically generated exterior surface, the exterior surface of the liner being dimensioned for engagement with the interior surface of the cup, the exterior surface of the liner being characterized by a plurality of elongated ridges, each said ridge having a first longitudinal side unitary with the exterior surface of the liner and a second longitudinal side spaced from the exterior surface, the first sides of said ridges lying substantially in a common plane each said ridge being independently resiliently deflectable relative to the exterior surface and relative to each other of said ridges, the cup comprising means for engagement with the ridges of the liner for retaining the cup and the liner in interengaged relation with one another.
Claim 14
Dependent Claim
26 words
An orthopedic prosthesis as in claim 10, wherein each said ridge includes opposed longitudinal ends, said ridges being disposed substantially in end-to-end relation with one another.
Claim 15
Dependent Claim
30 words
An orthopedic prosthesis as in claim 10, wherein each said ridge extends through an arc on the spherically generated exterior surface of the liner, said arc being between approximately 30°-60°.
Claim 16
Dependent Claim
157 words
An orthopedic prosthesis comprising a cup defining an open shell having a spherically generated interior surface and a liner defining an open shell having a spherically generated exterior surface, the liner including a generally planar edge adjacent the spherically generated arcuate surface thereof, the exterior surface of the liner being dimensioned for engagement with the interior surface of the cup, the exterior surface of the liner being characterized by a plurality of elongated ridges, the ridges being substantially parallel to the planar edge of the liner, each said ridge having a first longitudinal side unitary with the exterior surface of the liner and a second longitudinal side spaced from the exterior surface, each said ridge being independently resiliently deflectable relative to the exterior surface and relative to each other of said ridges, the cup comprising means for engagement with the ridges of the liner for retaining the cup and the liner in interengaged relation with one another.
Claim 17
Dependent Claim
157 words
An orthopedic prosthesis comprising a cup defining an open shell having a spherically generated interior surface and a liner defining an open shell having a spherically generated exterior surface, the liner including a generally planar edge adjacent the spherically generated arcuate surface thereof, the exterior surface of the liner being dimensioned for engagement with the interior surface of the cup, the exterior surface of the liner being characterized by a plurality of elongated ridges, the ridges being substantially parallel to the planar edge of the liner, each said ridge having a first longitudinal side unitary with the exterior surface of the liner and a second longitudinal side spaced from the exterior surface, each said ridge being independently resiliently deflectable relative to the exterior surface and relative to each other of said ridges, the cup comprising means for engagement with the ridges of the liner for retaining the cup and the liner in interengaged relation with one another.
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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) | 1997-12-26 | 1998-06-27 | 1998-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-26 | 2002-06-27 | 2002-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-26 | 2006-06-27 | 2006-12-27 | $7700.00 | Window Closed / Lapsed |