Patent US4001897A successfully refreshed from Google Patents.
US4001897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prosthesis for a joint
Assignee: Individual
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Filing: 1976-01-27
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Granted: 1977-01-11
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Expires: 1996-01-27
Abstract
Abstract A partial prosthesis for a joint designed to replace the head of a femur. A spherical head integral with a pin, which is designed to engage the femur, when in its utilization position engages a spherical cap which is to be accommodated and supported in the acetabulum of a hip. The cap has an inside spherical bearing surface of given diameter to assure that the spherical head has great freedom of movement therein and, at its base, an internal cylindrical shoulder small in width and of a diameter slightly smaller than the spherical bearing surface.
Inventors
- 👤 Andre Rambert
- 👤 Gilles Bousquet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:11
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2/3609; A61F2002/30001; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30354; A61F2002/30469; A61F2002/3208; A61F2/34; A61F2002/345; A61F2002/3611; A61F2002/3625; A61F2002/3631; A61F2002/3654; A61F2220/00; A61F2220/0025; A61F2220/0033
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
131 words
A prosthesis for a joint comprising, in combination: a spherical head integral with a part which is to substitute for at least a portion of a bone, and a spherical cap which is to be accommodated and supported in a patient, said spherical cap having (1) an inside spherical bearing surface with a given diameter so as to ensure that said spherical head may be accommodated and have freedom of movement therein, (2) an internal cylindrical shoulder at its base, said shoulder being narrow in width and having a diameter slightly smaller than said given diameter, and (3) a portion defining an inner cylindrical surface co-axial with said bearing surface and adjacent said shoulder, said cylindrical surface being disposed between said shoulder and said spherical surface when in its utilization position.
Claim 2
Dependent Claim
131 words
A prosthesis for a joint comprising, in combination: a spherical head integral with a part which is to substitute for at least a portion of a bone, and a spherical cap which is to be accommodated and supported in a patient, said spherical cap having (1) an inside spherical bearing surface with a given diameter so as to ensure that said spherical head may be accommodated and have freedom of movement therein, (2) an internal cylindrical shoulder at its base, said shoulder being narrow in width and having a diameter slightly smaller than said given diameter, and (3) a portion defining an inner cylindrical surface co-axial with said bearing surface and adjacent said shoulder, said cylindrical surface being disposed between said shoulder and said spherical surface when in its utilization position.
Claim 3
Dependent Claim
41 words
A prosthesis for a joint according to claim 1, wherein said part which is to be substituted for at least a portion of a bone comprises a pin for engaging into a femur of a patient to provide a partial prosthesis.
Claim 4
Dependent Claim
32 words
A prosthesis for a joint according to claim 2, wherein its spherical cap comprises a spherical cap which can be accommodated and supported in the acetabulum of a hip of a patient.
Claim 5
Dependent Claim
32 words
A prosthesis for a joint according to claim 1, wherein its spherical cap comprises a spherical cap which can be accommodated and supported in the acetabulum of a hip of a patient.
Claim 6
Dependent Claim
29 words
A prosthesis for a joint according to claim 1, wherein said cylindrical surface co-axial with said bearing surface defines a cylinder having a diameter equal to said given diameter.
References Cited (Backward Citations)
US3813699A
Cited
US3894297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |