US4003095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trispherical prosthetic shoulder device
Assignee: MTG Divestitures LLC
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Filing: 1976-04-29
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Granted: 1977-01-18
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Expires: 1996-04-29
Abstract
Abstract Biocompatible metal balls are secured by affixation stems to the humerus and the scapular region of the shoulder. The balls are rotatably captured between a pair of cutout plastic hemispheres, which are secured to each other to form a spheroid by a U-shaped collar. The prosthesis accordingly provides a wide range of articulation with substantially high stability.
Inventors
- 👤 Anthony G. Gristina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:17
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/40; A61F2/4081; A61F2002/30001; A61F2002/30108; A61F2002/30199; A61F2002/30242; A61F2002/30245; A61F2002/30316; A61F2002/30535; A61F2002/30574; A61F2002/30621; A61F2002/30649; A61F2002/30665; A61F2/3094; A61F2002/30975; A61F2/32; A61F2002/3208; A61F2002/3216; A61F2/4014; A61F2002/4029; A61F2002/4033; A61F2002/4085; A61F2230/00; A61F2230/0063; A61F2230/0071
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
142 words
A trispherical prosthetic shoulder device comprising a relatively small ball-headed humeral component of a biocompatible metal, a humeral stem on the ball-headed humeral component for affixing it to the intermedullary canal of the humerus, a humeral flange separating the ball-headed component from the stem, a ball-headed scapular component of a biocompatible metal, a scapular stem on the scapular component for attaching it to the scapular region of the shoulder, a scapular flange separating the scapular ball from the scapular stem, a spheroidal ball-capturing member having a pair of spherical sockets disposed substantially 180° from each other, the ball-capturing member comprising a pair of biocompatible cutout plastic hemispheres sharing the sockets between them, and clamping means joining the hemispheres together whereby the ball-heads are rotatably trapped in the sockets to provide a substantially stable shoulder prosthesis with a substantially wide range of movement.
Claim 2
Dependent Claim
142 words
A trispherical prosthetic shoulder device comprising a relatively small ball-headed humeral component of a biocompatible metal, a humeral stem on the ball-headed humeral component for affixing it to the intermedullary canal of the humerus, a humeral flange separating the ball-headed component from the stem, a ball-headed scapular component of a biocompatible metal, a scapular stem on the scapular component for attaching it to the scapular region of the shoulder, a scapular flange separating the scapular ball from the scapular stem, a spheroidal ball-capturing member having a pair of spherical sockets disposed substantially 180° from each other, the ball-capturing member comprising a pair of biocompatible cutout plastic hemispheres sharing the sockets between them, and clamping means joining the hemispheres together whereby the ball-heads are rotatably trapped in the sockets to provide a substantially stable shoulder prosthesis with a substantially wide range of movement.
Claim 3
Dependent Claim
36 words
A trispherical prosthetic shoulder device as set forth in claim 1 wherein the clamping means comprises a substantially U-shaped collar having a pair of arms and fastening means connecting the arms and extending through the hemispheres.
Claim 4
Dependent Claim
29 words
A trispherical prosthetic shoulder device as set forth in claim 1 wherein the humeral component has an elongated tapered stem for insertion into the intermedullary canal of the humerus.
Claim 5
Dependent Claim
51 words
A trispherical prosthetic shoulder device as set forth in claim 3 wherein the humeral stem is disposed approximately at an angle of 30° relative to the humeral flange, and the humeral ball-head is attached to the flange by a neck disposed approximately at an angle of 90° relative to the flange.
Claim 6
Dependent Claim
29 words
A trispherical prosthetic shoulder device as set forth in claim 4 wherein the portion of the humeral stem joining it to the humeral flange has a slight radial curve.
Claim 7
Dependent Claim
18 words
A trispherical prosthetic shoulder device as set forth in claim 1 wherein the scapular stem is substantially T-shaped.
Claim 8
Dependent Claim
34 words
A trispherical prosthetic shoulder device as set forth in claim 6 wherein the T-shaped stem has a flat base and the flat base is disposed at an acute angle relative to the scapular flange.
Claim 9
Dependent Claim
17 words
A trispherical prosthetic shoulder device as set forth in claim 1 wherein the flanges are substantially oval.
Claim 10
Dependent Claim
25 words
A trispherical prosthetic shoulder devices as set forth in claim 8 wherein the humeral ball is attached near one end of the oval humeral flange.
Claim 11
Dependent Claim
21 words
A trispherical prosthetic shoulder device as set forth in claim 1 wherein a short neck joins the ball-heads to the flanges.
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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) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |