US4769041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hip joint socket
Assignee: Protek AG
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Filing: 1986-06-27
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Granted: 1988-09-06
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Expires: 2006-06-27
Abstract
Abstract The hip joint socket has a plastic socket body which is covered on the outer surface with a multi-layer grid and which is provided with a plurality of peg-like projections of metal which are welded into the plastic socket body. The use of the metal projections and the metal grid prevent direct contact between the pelvic bone and plastic socket body in order to avoid disintegration of the plastic body by body fluids. The welding in of the projections provides a cost effective and small labor-intensive fixation of the projections in the socket body while ensuring firm and secure anchoring.
Inventors
- 👤 Erwin W. Morscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:32
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30721; A61F2/30749; A61F2/30767; A61F2/30907; A61F2/32; A61F2/34; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61F2002/30001; A61F2002/30108; A61F2002/30199; A61F2002/30224; A61F2002/30235; A61F2002/30316; A61F2002/30329; A61F2002/30451; A61F2002/30535; A61F2002/30593; A61F2/30771; A61F2002/30772; A61F2002/3082; A61F2002/30822; A61F2002/30827; A61F2002/30841; A61F2002/30845; A61F2002/30878; A61F2002/30891; A61F2002/30892; A61F2002/30899; A61F2002/30901; A61F2002/30902; A61F2002/30909; A61F2002/30914; A61F2002/30915; A61F2002/30929; A61F2002/3412; A61F2002/348; A61F2002/3482; A61F2220/00; A61F2220/0025; A61F2220/0058; A61F2230/00; A61F2230/0063; A61F2230/0069; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00035; A61F2310/00089; A61F2310/00095; A61F2310/00131; A61F2310/00389; A61F2310/00395; A61F2310/00407; A61F2310/00419; A61F2310/00485; A61F2310/00491; A61F2310/00544
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
88 words
A hip joint socket for cement-free anchoring in a pelvic bone comprising a plastic body having a spherical outer surface; a metal grid disposed in said outer surface of said plastic body for contacting the pelvic bone, said grid including at least two layers of metal material; and at least one peg-like metal projection welded to and penetrating into said spherical outer surface of said plastic body inwardly beyond said metal grid, said projection extending outwardly of said surface and said grid for disposition in the pelvic bone.
Claim 2
Dependent Claim
88 words
A hip joint socket for cement-free anchoring in a pelvic bone comprising a plastic body having a spherical outer surface; a metal grid disposed in said outer surface of said plastic body for contacting the pelvic bone, said grid including at least two layers of metal material; and at least one peg-like metal projection welded to and penetrating into said spherical outer surface of said plastic body inwardly beyond said metal grid, said projection extending outwardly of said surface and said grid for disposition in the pelvic bone.
Claim 3
Dependent Claim
18 words
A hip joint socket as set forth in claim 1 wherein said projection is a hollow cylindrical sleeve.
Claim 4
Dependent Claim
28 words
A hip joint socket as set forth in claim 2 wherein said sleeve has a bore with a trumpet-like enlargement atone end to define a sharp peripheral edge.
Claim 5
Dependent Claim
36 words
A hip joint socket as set forth in claim 1 wherein said projection includes a bearing plate at a base region welded to said plastic body and a hollow anchoring cylinder penetrating into said plastic body.
Claim 6
Dependent Claim
20 words
A hip joint socket as set forth in claim 4 wherein said cylinder includes a plurality of peripherally disposed bores.
Claim 7
Dependent Claim
28 words
A hip joint socket as set forth in claim 4 wherein at least one of said bearing plate and said cylinder has a plurality of groove-like depressions therein.
Claim 8
Dependent Claim
20 words
A hip joint socket as set forth in claim 1 wherein said projection is friction welded to said plastic body.
Claim 9
Dependent Claim
34 words
A hip joint socket as set forth in claim 1 wherein each of said grid and said projection is formed of a metal selected from the the group consisting of titanium and titanium alloy.
Claim 10
Dependent Claim
66 words
A hip joint socket for cement-free anchoring in a pelvic bone comprising a plastic body having a spherical outer surface; a multi-layer metal grid secured to said surface of said plastic body for contacting a pelvic bone; and a plurality of peg-like metal projections secured to said plastic body and extending outwardly of said grid for penetration into a pelvic bone to anchor said body thereto.
Claim 11
Dependent Claim
66 words
A hip joint socket for cement-free anchoring in a pelvic bone comprising a plastic body having a spherical outer surface; a multi-layer metal grid secured to said surface of said plastic body for contacting a pelvic bone; and a plurality of peg-like metal projections secured to said plastic body and extending outwardly of said grid for penetration into a pelvic bone to anchor said body thereto.
Claim 12
Dependent Claim
19 words
A hip joint socket as set forth in claim 9 wherein said projections are disposed in a triangular array.
Claim 13
Dependent Claim
18 words
A hip joint socket as set forth in claim 9 wherein each projection is a hollow cylindrical sleeve.
Claim 14
Dependent Claim
22 words
A hip joint socket as set forth in claim 11 wherein each sleeve has a sharp peripheral edge at an outer end.
Claim 15
Dependent Claim
21 words
A hip joint socket as set forth in claim 11 wherein each sleeve has periperally disposed bores for ingrowth of tissue.
Claim 16
Dependent Claim
37 words
A hip joint socket as set forth in claim 11 wherein each said projection includes a bearing plate at a base region welded to said plastic body and a hollow anchoring cylinder penetrating into said socket body.
Claim 17
Dependent Claim
20 words
A hip joint socket as set forth in claim 14 wherein each cylinder includes a plurality of peripherally disposed bores.
Claim 18
Dependent Claim
28 words
A hip joint socket as set forth in claim 14 wherein at least one of said bearing plate and said cylinder has a plurality of groove-like depressions therein.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |