Patent US3671978A successfully refreshed from Google Patents.
US3671978A
Expired / Lapsed
US
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Angular adjustment devices for use in artificial limb manufacture
Assignee: JE Hanger and Co Ltd
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Filing: 1971-08-09
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Granted: 1972-06-27
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Expires: 1991-08-09
Abstract
Abstract An adjustment means for pre-setting relative angularity between the axes of two parts of an artificial limb or prosthesis comprising wedge shaped discs mutually rotatable about an axis and having inter-engaging eccentric means for imparting a transverse translational movement between the discs upon relative rotation to eliminate variation of axial spacing between the outer surfaces of the discs upon adjustment thereof.
Inventors
- 👤 Denis Ronald William May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:39
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/50; A61F2/76; A61F2002/5016; A61F2002/5018
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
108 words
An angular adjustment device for interpositioning between two parts of a prosthesis, comprising at least one pair of discs of wedge-shaped cross-section, each pair having a central interface and outer surfaces engageable with parts of the prosthesis which are connected by locking means extending through said discs, said discs being relatively rotatable about an axis for adjustment of the angle between the prosthesis parts, and interengaging abutment means at said interface and eccentric of said axis to impart relative translational movement to said discs upon relative rotation thereof to maintain a substantially constant axial distance between said outer surfaces of each pair as established by said locking means.
Claim 2
Dependent Claim
108 words
An angular adjustment device for interpositioning between two parts of a prosthesis, comprising at least one pair of discs of wedge-shaped cross-section, each pair having a central interface and outer surfaces engageable with parts of the prosthesis which are connected by locking means extending through said discs, said discs being relatively rotatable about an axis for adjustment of the angle between the prosthesis parts, and interengaging abutment means at said interface and eccentric of said axis to impart relative translational movement to said discs upon relative rotation thereof to maintain a substantially constant axial distance between said outer surfaces of each pair as established by said locking means.
Claim 3
Dependent Claim
58 words
An angular adjustment device according to claim 1 in which the extent of eccentricity e of said abutment means is equal to r sin theta where r is the radius of the central interface between a pair of discs taken from the center of the effective radius of tilt and theta is the wedge angle of the discs.
Claim 4
Dependent Claim
33 words
An angular adjustment devicE according to claim 1, wherein said interengaging abutment means comprises an eccentric recess in one disc and an eccentric boss on the other disc and nested in said recess.
Claim 5
Dependent Claim
55 words
An angular adjustment device according to claim 3 wherein said locking means comprises a bolt and nut, one of said discs having an axial bore journalled on said bolt, and the other of said discs having an enlarged opening concentric with its eccentric means to permit lateral movement of said disc relative to said bolt.
Claim 6
Dependent Claim
54 words
An angular adjustment device according to claim 3 wherein said locking means comprises a bolt and nut, one o said discs having aaxial bore journalled on said bolt, and the other of said discs having a enlarged opening oncentric with its eccentric means to permit laeeral movement of said dis relative to said bolt.
References Cited (Backward Citations)
US3414908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |