Patent US6475242B1 successfully refreshed from Google Patents.
US3889299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prosthetic hip joint devices
Assignee: National Research Development Corp UK
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Filing: 1974-01-07
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Granted: 1975-06-17
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Expires: 1994-01-07
Abstract
Abstract The femoral component of a prosthetic total hip joint replacement device which normally also includes an acetabular socket component is modified for initial use as a partial hip joint replacement by the securement in demountable manner of a larger ball-shaped head around the ball-shaped head of the original femoral component. Thus, the modified component is used with the natural acetabular socket, and future provision of a total hip joint replacement in the same patient then only requires demounting of the larger head assembly and provision of a prosthetic acetabular socket.
Inventors
- 👤 Geoffrey Vaughan Osborne
- 👤 Roger Gilbert Rowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:27
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2/3609; A61F2/46; A61F2/4637; A61F2002/30001; A61F2002/30316; A61F2002/30329; A61F2002/30383; A61F2002/30433; A61F2002/30476; A61F2002/30487; A61F2002/30507; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30774; A61F2002/3079; A61F2/3094; A61F2002/30975; A61F2002/3611; A61F2002/3625; A61F2002/365; A61F2002/4641; A61F2220/00; A61F2220/0025; A61F2220/0041
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
104 words
A prosthetic hip joint device comprising: a femoral head replacement component of integral metal construction including a relatively small ball-shaped head for use in articulating engagement with a prosthetic acetabular socket component, and a larger ball-shaped head assembly secured around said smaller head to modify said femoral component for initial use in articulating engagement with the natural acetabular socket, said larger ball-shaped head assembly being adapted for release from said smaller head, and said larger ball-shaped head assembly being of multiple-layer construction including an inner layer of plastic material adjacent said smaller head and an outer layer of metal remote from said smaller head.
Claim 2
Dependent Claim
104 words
A prosthetic hip joint device comprising: a femoral head replacement component of integral metal construction including a relatively small ball-shaped head for use in articulating engagement with a prosthetic acetabular socket component, and a larger ball-shaped head assembly secured around said smaller head to modify said femoral component for initial use in articulating engagement with the natural acetabular socket, said larger ball-shaped head assembly being adapted for release from said smaller head, and said larger ball-shaped head assembly being of multiple-layer construction including an inner layer of plastic material adjacent said smaller head and an outer layer of metal remote from said smaller head.
Claim 3
Dependent Claim
26 words
A device according to claim 1 wherein said femoral component and said assembly are sealably secured together against ingress of body fluid and like matter therebetween.
Claim 4
Dependent Claim
24 words
A device according to claim 1 wherein said larger ball-shaped head assembly is secured with said femoral head replacement component in mutually non-rotatable manner.
Claim 5
Dependent Claim
73 words
A device according to claim 1 wherein said femoral component comprises an elongated tapered intramedullary stem terminating, at its wider end, and by way of a necked portion, in said smaller head; said assembly inner layer extends over said smaller head and said necked portion; and said assembly outer layer extends over only said smaller head and is seated in said inner layer to provide a substantially continuous exterior surface for said assembly.
Claim 6
Dependent Claim
52 words
A device according to claim 1 wherein said assembly comprises: a cap formed by said inner and outer layers to engage over said smaller head, and a pair of similar semi-annular shells formed by further parts of said inner layer, which shells mutually connect around said necked portion and secure said cap.
Claim 7
Dependent Claim
18 words
A device according to claim 1 wherein said smaller and larger heads have mutually-concentric respective spherical exterior shapings.
Claim 8
Dependent Claim
61 words
A prosthetic hip joint device comprising: a femoral head replacement component having a relatively small spherically-shaped head for use in articulating engagement with a prosthetic acetabular socket component; and a larger spherically-shaped head assembly secured around said smaller head in mutually non-rotatable, liquid-tight, demountable manner to modify said femoral component for initial use in articulating engagement with the natural acetabular socket.
Claim 9
Dependent Claim
61 words
A prosthetic hip joint device comprising: a femoral head replacement component having a relatively small spherically-shaped head for use in articulating engagement with a prosthetic acetabular socket component; and a larger spherically-shaped head assembly secured around said smaller head in mutually non-rotatable, liquid-tight, demountable manner to modify said femoral component for initial use in articulating engagement with the natural acetabular socket.
Claim 10
Dependent Claim
18 words
A device according to claim 7 wherein the spherical shapings of said smaller and larger heads are concentric.
Claim 11
Dependent Claim
59 words
A prosthetic hip joint device comprising: a femoral head replacement component having a relatively small spherically-shaped head for use in articulating engagement with a prosthetic acetabular socket component; and a larger spherically-shaped head assembly secured concentrically around said smaller head in demountable manner to modify said femoral component for initial use in articulating engagement with the natural acetabular socket.
Claim 12
Dependent Claim
59 words
A prosthetic hip joint device comprising: a femoral head replacement component having a relatively small spherically-shaped head for use in articulating engagement with a prosthetic acetabular socket component; and a larger spherically-shaped head assembly secured concentrically around said smaller head in demountable manner to modify said femoral component for initial use in articulating engagement with the natural acetabular socket.
Claim 13
Dependent Claim
79 words
The use of a prosthetic hip joint device comprising a femoral head replacement component having a relatively small ball-shaped head with a larger ball-shaped head demountably secured therearound, which use comprises: initially securing said femoral component in the femur to employ said larger head in articulating engagement with the natural acetabulum; and subsequently securing a prosthetic acetabular component in the acetabulum, and removing said larger head assembly to employ said smaller head in articulating engagement with said acetabular component.
Claim 14
Dependent Claim
79 words
The use of a prosthetic hip joint device comprising a femoral head replacement component having a relatively small ball-shaped head with a larger ball-shaped head demountably secured therearound, which use comprises: initially securing said femoral component in the femur to employ said larger head in articulating engagement with the natural acetabulum; and subsequently securing a prosthetic acetabular component in the acetabulum, and removing said larger head assembly to employ said smaller head in articulating engagement with said acetabular component.
References Cited (Backward Citations)
US3466670A
Cited
US3512184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |