Patent US4450592A successfully refreshed from Google Patents.
US4450592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joint socket for a hip joint prosthesis
Assignee: Sulzer AG
•
Filing: 1982-01-08
•
Granted: 1984-05-29
•
Expires: 2002-01-08
Abstract
Abstract The socket body has an exterior surface which tapers in one direction while anchoring beads on the exterior surface taper in an opposite outward direction. The beads serve to anchor the body within a pelvis. In addition, cross ribs are formed on the anchoring beads with at least some of the ribs being elastic. Upon insertion of the socket, the ribs bend in a direction opposite to the direction of insertion. The two oppositely directed anchoring tapers of the socket body and the beads provide a firm fit of the socket body in a pelvis with a cement-free anchoring. Also, the bent ribs tend to resist withdrawal of the socket from the pelvis.
Inventors
- 👤 Peter G. Niederer
- 👤 Otto Frey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:32
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/34; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/3008; A61F2/30767; A61F2/30771; A61F2002/3082; A61F2002/30878; A61F2002/30879; A61F2002/3241; A61F2002/3412; A61F2002/3417; A61F2002/3443; A61F2002/3453; A61F2002/3462; A61F2250/00; A61F2250/0058; A61F2250/0096; A61F2250/0098
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
90 words
A joint socket for a hip joint prosthesis comprising a body having an internal socket disposed about an axis of rotation and an exterior surface tapering inwardly towards one end symmetrically of said axis; a plurality of anchoring beads projecting from said exterior surface, each bead being of an outwardly increasing width in a direction towards said one end to widen conically relative to said axis of rotation; and a plurality of ribs in each said bead disposed transversely to said axis, at least some of said ribs being elastic.
Claim 2
Dependent Claim
90 words
A joint socket for a hip joint prosthesis comprising a body having an internal socket disposed about an axis of rotation and an exterior surface tapering inwardly towards one end symmetrically of said axis; a plurality of anchoring beads projecting from said exterior surface, each bead being of an outwardly increasing width in a direction towards said one end to widen conically relative to said axis of rotation; and a plurality of ribs in each said bead disposed transversely to said axis, at least some of said ribs being elastic.
Claim 3
Dependent Claim
30 words
A joint socket as set forth in claim 1 wherein each said bead widens conically relative to said axis of rotation on an angle of between 1 to 20 degrees.
Claim 4
Dependent Claim
25 words
A joint socket as set forth in claim 2 wherein said body is made of polyethylene and said angle is from 5 to 15 degrees.
Claim 5
Dependent Claim
35 words
A joint socket as set forth in claim 3 wherein each rib is of a thickness of from 0.3 to 1.5 millimeters and is spaced from an adjacent rib of from 0.5 to 2.5 millimeters.
Claim 6
Dependent Claim
27 words
A joint socket as set forth in claim 1 which further comprises an eccentrically located means on said body for establishing a mounting position for said body.
Claim 7
Dependent Claim
94 words
A joint socket for a hip joint prosthesis comprising a body having an internal socket disposed about an axis of rotation and an exterior surface tapering inwardly towards one end symmetrically of said axis; a plurality of anchoring beads projecting radially from said exterior surface between said ends, each bead being of an outwardly increasing width in a direction towards said one end to widen conically relative to said axis of rotation; and a plurality of ribs in each said bead disposed transversely to said axis, at least some of said ribs being elastic.
Claim 8
Dependent Claim
94 words
A joint socket for a hip joint prosthesis comprising a body having an internal socket disposed about an axis of rotation and an exterior surface tapering inwardly towards one end symmetrically of said axis; a plurality of anchoring beads projecting radially from said exterior surface between said ends, each bead being of an outwardly increasing width in a direction towards said one end to widen conically relative to said axis of rotation; and a plurality of ribs in each said bead disposed transversely to said axis, at least some of said ribs being elastic.
Claim 9
Dependent Claim
100 words
A joint socket for a hip joint prosthesis comprising a body having an internal socket disposed about an axis of rotation and an exterior trunco-conical surface tapering inwardly towards one end symmetrically of said axis; a plurality of anchoring beads projecting from said exterior surface, each bead being disposed on a generatrix of said body and being of an outwardly increasing width in a direction towards said one end to widen conically relative to said axis of rotation; and a plurality of ribs in each said bead disposed transversely to said axis, at least some of said ribs being elastic.
Claim 10
Dependent Claim
100 words
A joint socket for a hip joint prosthesis comprising a body having an internal socket disposed about an axis of rotation and an exterior trunco-conical surface tapering inwardly towards one end symmetrically of said axis; a plurality of anchoring beads projecting from said exterior surface, each bead being disposed on a generatrix of said body and being of an outwardly increasing width in a direction towards said one end to widen conically relative to said axis of rotation; and a plurality of ribs in each said bead disposed transversely to said axis, at least some of said ribs being elastic.
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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |