Patent US3837008A successfully refreshed from Google Patents.
US3837008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endo-prosthesis for a wrist joint
Assignee: Sulzer AG
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Filing: 1972-08-31
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Granted: 1974-09-24
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Expires: 1992-08-31
Abstract
Abstract The wrist joint prosthesis is formed of a spherical head and a two-part socket. The socket allows the head and attached shaft to move via at least one appendage within a guideway parallel to the mating plane of the socket parts while also allowing the head and shaft to move transversely of the socket within mouthlike openings in the socket parts.
Inventors
- 👤 A Bahler
- 👤 N Gschwend
- 👤 H Scheier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:40
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/42; A61F2/4261
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
163 words
An endo-prosthesis for a wrist joint comprising a spherical head; a shaft attached to and extending from said head; a spherical socket receiving said head therein, said socket having two half parts detachably mounted with respect to each other about said head and a common plane, each said part having a central hemispherical bearing surface, and a mouthlike opening at an edge thereof for passage of said shaft to permit pivoting of said shaft and said head in two perpendicular planes for each position of said shaft within said opening, said opening being substantially V-shaped in said common plane and defining a first angle in a plane parallel to said common plane to permit pivoting of said shaft in said common plane and a second angle in a plane perpendicular to said common plane to permit pivoting of said shaft perpendicularly of said common plane, and means for preventing rotation of said head within said socket about an extended axis of said shaft.
Claim 2
Dependent Claim
163 words
An endo-prosthesis for a wrist joint comprising a spherical head; a shaft attached to and extending from said head; a spherical socket receiving said head therein, said socket having two half parts detachably mounted with respect to each other about said head and a common plane, each said part having a central hemispherical bearing surface, and a mouthlike opening at an edge thereof for passage of said shaft to permit pivoting of said shaft and said head in two perpendicular planes for each position of said shaft within said opening, said opening being substantially V-shaped in said common plane and defining a first angle in a plane parallel to said common plane to permit pivoting of said shaft in said common plane and a second angle in a plane perpendicular to said common plane to permit pivoting of said shaft perpendicularly of said common plane, and means for preventing rotation of said head within said socket about an extended axis of said shaft.
Claim 3
Dependent Claim
69 words
An endo-prosthesis as set forth in claim 1 wherein said means includes at least one appendage extending from said head in perpendicular relation to an axis passing centrally through said head, socket and openings and a slitlike guideway in said socket receiving said appendage therein, said guideway being sized to permit slidable movement of said appendage therein in a plane between said parts and rotation of said appendage therein.
Claim 4
Dependent Claim
45 words
An endo-prosthesis as set forth in claim 2 wherein one of said half parts of said socket includes a peripheral recess therein and the other of said parts includes a means received in said recess to define said guideway within the plane of said recess.
Claim 5
Dependent Claim
29 words
An endo-prosthesis as set forth in claim 2 wherein one of said half parts of said socket includes at least one abutment defining a peripheral extremity of said guideway.
Claim 6
Dependent Claim
29 words
An endo-prosthesis as set forth in claim 4 wherein said abutment is a peripheral rim part received in a peripheral recess in the other half part of said socket.
Claim 7
Dependent Claim
35 words
An endo-prosthesis as set forth in claim 2 wherein said mouthlike openings define a first angle and said guideway defines a second angle smaller than said first angle within the plane of said first angle.
Claim 8
Dependent Claim
15 words
An endo-prosthesis as set forth in claim 2 wherein said appendage is a circular cylinder.
Claim 9
Dependent Claim
15 words
An endo-prosthesis as set forth in claim 2 wherein said appendage is spherical in shape.
Claim 10
Dependent Claim
27 words
An endo-prosthesis as set forth in claim 1 wherein said socket includes a second shaft extending from said parts at a point diametrically opposite from said openings.
Claim 11
Dependent Claim
71 words
An endo-prosthesis as set forth in claim 9 wherein said head includes at least one appendage extending therefrom in perpendicular relation to said first shaft and wherein said socket includes a slitlike guideway disposed in parallel to said second shaft and receiving said appendage therein in rotating and in slidable relation whereby said first shaft is relatively movable transversely of the plane of said second shaft and transversely within said openings.
Claim 12
Dependent Claim
22 words
An endo-prosthesis as set forth in claim 1 wherein said first angle is approximately 20* and said second angle is approximately 70*.
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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |