US4327449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetabular prosthesis
Assignee: Charnley Surgical Inventions Ltd
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Filing: 1980-06-26
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Granted: 1982-05-04
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Expires: 2000-06-26
Abstract
Abstract An acetabular prosthesis comprises a body 41 of plastics material defining a part-spherical socket cavity 43 surrounded by a rim 44. A flange extends outwardly from the rim 44. At 48 it inclines from the rim 44 in the direction of the body 41 and at 49 it inclines from the rim in a direction away from the body 41, while lobes 46, 47 therebetween are correspondingly curved. This arrangement provides for a considerably increased area of bone in the acetabulum to be available as a cementing surface when the prosthesis is fitted into a reamed out hip acetabulum in the special circumstances of the invention which is that the axis of socket cavity 43 extends substantially transversely with no or little anteversion.
Inventors
- 👤 John Charnley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:04
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/34; A61B; A61B90/00; A61B90/90; A61B90/94; A61F2/30767; A61F2/30771; A61F2002/30795; A61F2002/3082; A61F2002/3429; A61F2002/3443; A61F2/46; A61F2002/4631
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
64 words
An acetabular prosthesis comprising: a body of plastics material defining a blind part-spherical socket surrounded by a rim, and a flange around the body and extending outwardly from the rim, the flange inclining toward the body of the socket over approximately half of the periphery of the rim, the rest of the flange inclining in a direction away from the body of the socket.
Claim 2
Dependent Claim
64 words
An acetabular prosthesis comprising: a body of plastics material defining a blind part-spherical socket surrounded by a rim, and a flange around the body and extending outwardly from the rim, the flange inclining toward the body of the socket over approximately half of the periphery of the rim, the rest of the flange inclining in a direction away from the body of the socket.
Claim 3
Dependent Claim
18 words
A prosthesis as claimed in claim 1, wherein the flange is of varying width, having two diametrically-opposed lobes.
Claim 4
Dependent Claim
14 words
A prosthesis as claimed in claim 2, wherein the lobes are substantially crescent shaped.
Claim 5
Dependent Claim
40 words
A prosthesis as claimed in claim 2, wherein one part of the connecting portion of the flange between the lobes extends towards the body and the other part of the connecting portion extends in a direction away from the body.
Claim 6
Dependent Claim
23 words
A prosthesis as claimed in claim 2, wherein the flange is marked with cutting lines for facilitating removal of one lobe before use.
Claim 7
Dependent Claim
59 words
An acetabular prosthesis comprising: a body of plastics material defining a blind part-spherical socket surrounded by a rim, and a flange around the body and extending outwardly from the rim, the flange inclining toward the body of the socket over approximately half of the periphery of the rim, the rest of the flange being substantially co-planar with the rim.
Claim 8
Dependent Claim
59 words
An acetabular prosthesis comprising: a body of plastics material defining a blind part-spherical socket surrounded by a rim, and a flange around the body and extending outwardly from the rim, the flange inclining toward the body of the socket over approximately half of the periphery of the rim, the rest of the flange being substantially co-planar with the rim.
Claim 9
Dependent Claim
18 words
A prosthesis as claimed in claim 6, wherein the flange is of varying width, having two diametrically-opposed lobes.
Claim 10
Dependent Claim
14 words
A prosthesis as claimed in claim 7 wherein said lobes are substantially crescent shaped.
Claim 11
Dependent Claim
23 words
A prosthesis as claimed in claim 7, wherein the flange is marked with cutting lines for facilitating removal of one lobe before use.
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) | 1985-05-03 | 1985-11-02 | 1986-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-03 | 1989-11-02 | 1990-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-03 | 1993-11-02 | 1994-05-04 | $7700.00 | Window Closed / Lapsed |