US3875593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial hip-joint
Assignee: Individual
•
Filing: 1973-04-11
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Granted: 1975-04-08
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Expires: 1993-04-11
Abstract
Abstract An artificial hip-joint in which there is provided an endoprosthesis for the acetabulum, of which the outer surface is adapted to be embedded in the bony tissue of the pelvis, an endoprosthesis for the proximal portion of the femur having a head with a spherical surface rigidly connected by a neck with a shaft introduced into the femoral medullary canal, and an insertion piece providing for a hinged joint between the acetabulum endoprosthesis and the endoprosthesis of the proximal portion of the femur, with the insertion piece having an inner spherical surface interacting wtih the spherical surface of the head. The height of the cavity of the insertion piece defined by the inner spherical surface is smaller than the radius of the head, and the insertion piece is fixed in the seat of the acetabulum endoprosthesis by a nut.
Inventors
- 👤 Yakov Isaevich Shersher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:58
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30721; A61F2/30739; A61F2/32; A61F2/36; A61F2/3662; A61F2/367; A61F2002/30001; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30332; A61F2002/30354; A61F2002/30405; A61F2002/30476; A61F2002/30507; A61F2/30767; A61F2/30771; A61F2002/30841; A61F2002/30845; A61F2002/30878; A61F2002/30879; A61F2002/3233; A61F2002/3241; A61F2/34; A61F2002/3401; A61F2002/3403; A61F2002/3412; A61F2002/3414; A61F2/3609; A61F2002/3611; A61F2002/3621; A61F2002/3625; A61F2002/3631; A61F2002/365; A61F2002/3678; A61F2002/368; A61F2220/00; A61F2220/0025; A61F2220/0033
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
231 words
An artificial hip-joint comprising: an endoprosthesis for an acetabulum having a seat; said endoprosthesis of the acetabulum having an outer surface adapted to be fixed in the bony tissue of the pelvis; an endoprosthesis for the proximal portion of the femur having a head provided with a spherical surface, a neck and a shaft rigidly connected by way of said neck with said head of said endoprosthesis of the proximal portion of the femur, said shaft being designed for introduction into the femoral medullary canal; an insertion piece installed between the surface of said seat and said spherical surface of the head and providing for a hinged joint between said endoprosthesis of the proximal portion of the femur; said insertion piece having a spherical inner surface which interacts with said spherical surface of the head; a cavity for said insertion piece defined by said inner spherical surface of the insertion piece; the height of said cavity being less than the radius of said head; a nut for fixing said insertion piece in said seat of said endoprosthesis of the acetabulum; said nut having a spherical surface interacting with said head and an external screw thread which cooperates with an internal screw thread of said seat, the nut having a lower end flush with the plane of the lower end of the endoprosthesis of the acetabulum and means for locking said nut.
Claim 2
Dependent Claim
231 words
An artificial hip-joint comprising: an endoprosthesis for an acetabulum having a seat; said endoprosthesis of the acetabulum having an outer surface adapted to be fixed in the bony tissue of the pelvis; an endoprosthesis for the proximal portion of the femur having a head provided with a spherical surface, a neck and a shaft rigidly connected by way of said neck with said head of said endoprosthesis of the proximal portion of the femur, said shaft being designed for introduction into the femoral medullary canal; an insertion piece installed between the surface of said seat and said spherical surface of the head and providing for a hinged joint between said endoprosthesis of the proximal portion of the femur; said insertion piece having a spherical inner surface which interacts with said spherical surface of the head; a cavity for said insertion piece defined by said inner spherical surface of the insertion piece; the height of said cavity being less than the radius of said head; a nut for fixing said insertion piece in said seat of said endoprosthesis of the acetabulum; said nut having a spherical surface interacting with said head and an external screw thread which cooperates with an internal screw thread of said seat, the nut having a lower end flush with the plane of the lower end of the endoprosthesis of the acetabulum and means for locking said nut.
References Cited (Backward Citations)
US3053251A
Cited
US3067740A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |