US3818514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Femoral prosthesis with removable protective sheath
Assignee: SSL CC Services Ltd
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Filing: 1972-07-25
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Granted: 1974-06-25
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Expires: 1992-07-25
Abstract
Abstract A protective sheath for at least the neck of a femoral prosthesis, said sheath being substantially incompressible and having an inner surface shaped so as to be complementary to the shape of said femoral prosthesis neck, and an outer surface which is substantially cylindrical. The sheath may also cover the head of the prosthesis.
Inventors
- 👤 B Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:59
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/46; A61F2/4603; A61F2/4607; A61F2/32; A61F2/36; A61F2/3609; A61F2/0095; A61F2002/30001; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30667; A61F2002/30718; A61F2/3094; A61F2002/30975; A61F2002/3625; A61F2002/4625; A61F2002/4628; A61F2220/00; A61F2220/0025; A61F2220/0033
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
91 words
A femoral prosthesis comprising: a shaft, a part-spherical head and a neck joining said shaft and said head, a removable protective sheath surrounding said neck, said sheath being of a material softer than the material of said head and neck, being substantially incompressible and having an inner surface substantially complementary in shape to the shape of said neck and an outer surface which is substantially cyliNdrical, said sheath being in at least two parts, said parts having mating surfaces lying in radial planes, and retaining means for holding said parts together.
Claim 2
Dependent Claim
91 words
A femoral prosthesis comprising: a shaft, a part-spherical head and a neck joining said shaft and said head, a removable protective sheath surrounding said neck, said sheath being of a material softer than the material of said head and neck, being substantially incompressible and having an inner surface substantially complementary in shape to the shape of said neck and an outer surface which is substantially cyliNdrical, said sheath being in at least two parts, said parts having mating surfaces lying in radial planes, and retaining means for holding said parts together.
Claim 3
Dependent Claim
21 words
A femoral prosthesis according to claim 1 in which said outer surface of said sheath is of substantially circular cylindrical form.
Claim 4
Dependent Claim
18 words
A femoral prosthesis according to claim 1 in which said sheath also covers said head of said prosthesis.
Claim 5
Dependent Claim
28 words
A femoral prosthesis according to claim 1 in which said sheath is formed with passages to facilitate penetration of a sterilizing medium to all areas of said prosthesis.
Claim 6
Dependent Claim
24 words
A femoral prosthesis according to claim 1, wherein the outer surface of said sheath is substantially cylindrical throughout a major portion of its length.
Claim 7
Dependent Claim
39 words
A femoral prosthesis according to claim 1 in which said retaining device comprises at least one peg on one of said mating surfaces, said peg being a close fit into a mating hole on another of said mating surfaces.
Claim 8
Dependent Claim
17 words
A femoral prosthesis according to claim 1 in which said sheath is made from a plastic material.
Claim 9
Dependent Claim
81 words
A protective sheath for the neck in a femoral prosthesis, said sheath being substantially imcompressible and having an inner surface having convergent and divergent sections shaped for complementing the shape of a femoral prosthesis neck, a hemispherical surface section for complementing a hemispherical head in a femoral prosthesis and an outer surface which is substantially cylindrical, said sheath being in at least two parts, said parts having mating surfaces lying in radial planes, and retaining means for holding said parts together.
Claim 10
Dependent Claim
81 words
A protective sheath for the neck in a femoral prosthesis, said sheath being substantially imcompressible and having an inner surface having convergent and divergent sections shaped for complementing the shape of a femoral prosthesis neck, a hemispherical surface section for complementing a hemispherical head in a femoral prosthesis and an outer surface which is substantially cylindrical, said sheath being in at least two parts, said parts having mating surfaces lying in radial planes, and retaining means for holding said parts together.
Claim 11
Dependent Claim
24 words
A protective sheath according to claim 8, wherein the outer surface of said sheath is substantially cylindrical throughout a major portion of its length.
Claim 12
Dependent Claim
23 words
A protective sheath according to claim 8 in which said sheath is formed with axially extending passageways opening to said inner surface thereof.
Claim 13
Dependent Claim
28 words
A protective sheath according to claim 8 in which said sheath is formed with holes of small diameter extending from said outer surface to said inner surface thereof.
Claim 14
Dependent Claim
39 words
A protective sheath according to claim 8 in which said retaining means comprises at least one peg on one of said mating surfaces, said peg being a close fit into a mating hole on another of said mating surfaces.
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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |