US3723995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prosthetic hip enarthrosis
Assignee: Osteo AG
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Filing: 1970-05-19
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Granted: 1973-04-03
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Expires: 1990-05-19
Abstract
Abstract A prosthetic hip enarthrosis has a plurality of freely moving bearing balls occupying substantially the entire space between a ball provided for attachment to the femur and the concavity of a socket that is adapted to be attached to the pelvis to serve as a prosthetic acetabulum. A long-lasting lubricant is sealed in that space around the bearing balls by an agent, compatible with body tissue, which is carried by a locking ring that secures the ball in the socket in an adjustable manner so as to control the degree of mobility of the ball-and-socket joint.
Inventors
- 👤 F Baumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:16
CPC Classifications
F; F16; F16C; F16C19/00; F16C19/50; A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; F16C11/00; F16C11/04; F16C11/06; A61F2/34; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30016; A61F2002/30316; A61F2002/30329; A61F2002/30405; A61F2002/30535; A61F2002/30589; A61F2002/30621; A61F2002/30639; A61F2002/30667; A61F2002/30673; A61F2002/3233; A61F2002/3241; A61F2002/348; A61F2002/3493; A61F2/36; A61F2/3609; A61F2002/3611; A61F2220/00; A61F2220/0025; A61F2250/00; A61F2250/0014; A61F2250/0019; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00029; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32631; Y10T403/32681; Y10T403/32704; Y10T403/32737; Y10T403/32778; Y10T403/32803
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
181 words
A prosthetic hip enarthrosis comprising: a ball having means for attaching same to the femur of a wearer; a generally hemispherical socket concentrically and spacedly surrounding about half of said ball, thereby defining a curved clearance therewith; a locking ring spacedly surrounding another part of said ball, said locking ring and said socket being provided with two parallel transverse faces separated by a gap, one of said faces having a groove confronting the other face, said locking ring having a flange surrounding said socket in threaded engagement therewith; a first deformable O-ring seated in said groove and bearing upon said other face; a second deformable O-ring seated in another groove on the inner periphery of said locking ring and bearing upon said ball, said O-rings sealing said clearance against the outside while enabling limited relative motion of said ball and said socket to vary the depth of said clearance by relative rotation of said locking ring and said socket; and multiple discrete rolling-type antifriction bearing means and a lubricant in said clearance maintaining the spacing between said ball and said socket.
Claim 2
Dependent Claim
181 words
A prosthetic hip enarthrosis comprising: a ball having means for attaching same to the femur of a wearer; a generally hemispherical socket concentrically and spacedly surrounding about half of said ball, thereby defining a curved clearance therewith; a locking ring spacedly surrounding another part of said ball, said locking ring and said socket being provided with two parallel transverse faces separated by a gap, one of said faces having a groove confronting the other face, said locking ring having a flange surrounding said socket in threaded engagement therewith; a first deformable O-ring seated in said groove and bearing upon said other face; a second deformable O-ring seated in another groove on the inner periphery of said locking ring and bearing upon said ball, said O-rings sealing said clearance against the outside while enabling limited relative motion of said ball and said socket to vary the depth of said clearance by relative rotation of said locking ring and said socket; and multiple discrete rolling-type antifriction bearing means and a lubricant in said clearance maintaining the spacing between said ball and said socket.
Claim 3
Dependent Claim
22 words
A prosthetic hip enarthrosis as defined in claim 1 wherein said antifriction bearing means comprises a multiplicity of substantially contiguous spherical bodies.
Claim 4
Dependent Claim
23 words
A prosthetic hip enarthrosis as defined in claim 2 wherein said spherical bodies are of greater hardness than said ball and said socket.
Claim 5
Dependent Claim
26 words
A prosthetic hip enarthrosis as defined in claim 1 wherein the groove accommodating said first O-ring is provided in the transverse face of said locking ring.
References Cited (Backward Citations)
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US2809855A
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FR1047640A
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US2971770A
Cited
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Cited
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Cited
FR1448955A
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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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |