US3894297A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hip joint prosthesis
Assignee: OSCOBAL AG CHIRURGISCHE INSTRUMENTS und IMPLANTATE
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Filing: 1974-03-11
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Granted: 1975-07-15
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Expires: 1994-03-11
Abstract
Abstract The present invention relates to a joint prosthesis comprising a substantially frustoconical acetabulum member provided with supporting ribs in the form of a tapering thread and a prosthesis shaft provided with circular supporting ribs allowing anchorage of the prosthesis and the acetabulum member without using a cement or other adhesive.
Inventors
- 👤 Heinz Mittelmeier
- 👤 Kurt Karpf
- 👤 Heinz Moser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:54
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2/30767; A61F2/3609; A61F2002/30001; A61F2002/30316; A61F2002/30329; A61F2002/30476; A61F2002/305; A61F2002/30535; A61F2002/30563; A61F2002/30667; A61F2002/30673; A61F2/30771; A61F2002/30904; A61F2/34; A61F2002/3445; A61F2002/3448; A61F2002/3453; A61F2002/3462; A61F2002/3625; A61F2002/3627; A61F2002/3631; A61F2/46; A61F2/4603; A61F2002/4619; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00029; A61F2310/00179; A61F2310/00185; A61F2310/00203; A61F2310/00389; A61F2310/00592
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
83 words
A hip joint prosthesis, comprising a prosthesis shaft, a ball head on said shaft, and a substantially frusto-conical acetabulum member provided with supporting ribs in the form of a tapering thread about the frusto-conical exterior surface thereof, at least one groove in said exterior surface adapted to cut a thread in the pelvic bone of a patient, such ribs allowing anchorage of said acetabulum member without using cement or other adhesive, said acetabulum member defining a substantially spherical cavity receiving said ball head.
Claim 2
Dependent Claim
83 words
A hip joint prosthesis, comprising a prosthesis shaft, a ball head on said shaft, and a substantially frusto-conical acetabulum member provided with supporting ribs in the form of a tapering thread about the frusto-conical exterior surface thereof, at least one groove in said exterior surface adapted to cut a thread in the pelvic bone of a patient, such ribs allowing anchorage of said acetabulum member without using cement or other adhesive, said acetabulum member defining a substantially spherical cavity receiving said ball head.
Claim 3
Dependent Claim
40 words
A prosthesis as claimed in claim 1, wherein the prosthesis shaft is provided with circular supporting ribs having a rounded portion, said shaft and ribs having a profile corresponding substantially in shape to the threaded profile of a bone screw.
Claim 4
Dependent Claim
19 words
A prosthesis as claimed in claim 1, wherein the ball head is made of an aluminium oxide ceramic material.
Claim 5
Dependent Claim
37 words
A prosthesis as claimed in claim 1, wherein the acetabulum member is provided with a cap-shaped surface made of an aluminium oxide ceramic material, which cap is retained in position in said cavity by a snap-fitted bead.
Claim 6
Dependent Claim
33 words
A prosthesis as claimed in claim 1, wherein the acetabulum member is provided with a synthetic casing which acts as a shock absorber and is retained in position by a bead snap-fitted thereover.
Claim 7
Dependent Claim
26 words
A prosthesis as claimed in claim 1, wherein the acetabulum member is provided with at least two grooves, each having a cutting edge, around its circumference.
Claim 8
Dependent Claim
30 words
A prosthesis as claimed in claim 1, wherein the acetabulum member is provided with at least two slots on its circumference, which slots are capable of receiving an adjusting tool.
Claim 9
Dependent Claim
38 words
A prosthesis as claimed in claim 1, wherein the supporting ribs of the acetabulum member are provided in the form of a tapering thread and the profile thereof corresponds substantially to the threaded profile of a bone screw.
Claim 10
Dependent Claim
19 words
A prosthesis as claimed in claim 1, wherein the acetabulum member is provided with notches on its front surface.
Claim 11
Dependent Claim
39 words
A prosthesis as claimed in claim 1, wherein the acetabulum membEr has slots formed therein, which slots, when the prothesis is fitted to a patient, permit the passage of synovial fluid therethrough to wet the surfaces of the joint.
Claim 12
Dependent Claim
41 words
A prosthesis as claimed in claim 1, wherein the ball head is detachably located on a pin extending from the shaft and is retained in position by means of pegs engaging in depressions formed in a collar formed on the shaft.
Claim 13
Dependent Claim
35 words
A prosthesis as claimed in claim 1, wherein said shaft is provided with supporting ribs and wherein the ribs of the shaft and the acetabulum member are each coated with a layer of ceramic material.
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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |