US4183104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joint implant
Assignee: Sulzer AG
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Filing: 1978-05-23
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Granted: 1980-01-15
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Expires: 1998-05-23
Abstract
Abstract The joint implant utilizes a pin and socket arrangement wherein the pin and socket are of non-circular cross-sectional shapes. In addition, the socket has a shaped aperture which permits the pin to tilt or rock in the socket without twisting about the longitudinal axis of the pin. The socket has a reduced cross-sectional portion within which the pin is guided as well as widening portions within which the pin may tilt.
Inventors
- 👤 Otto Frey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:12
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/38; A61F2/3804; A61F2/30721; A61F2/42; A61F2/4241; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30138; A61F2002/30153; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30332; A61F2002/30339; A61F2002/30349; A61F2002/30362; A61F2002/30364; A61F2002/30367; A61F2002/30369; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0017; A61F2230/0019; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00179; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32622; Y10T403/70; Y10T403/7047; Y10T403/7061
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
106 words
A joint implant comprising a pair of anchoring elements for anchoring in respective bones of a joint; and means articulating said elements together in hinged relation, said means including a socket disposed in one of said elements and a pin disposed in the other of said elements, said socket having an elongated aperture therein with a reduced cross-sectional portion extending along a length of said aperture and widening cross-sectional portions on opposite sides of said reduced cross-sectional portion, said pin being of non-circular cross-section and extending into said aperture in mating engagement with said reduced cross-sectional portion and in spaced relation to said widening cross-sectional portions.
Claim 2
Dependent Claim
106 words
A joint implant comprising a pair of anchoring elements for anchoring in respective bones of a joint; and means articulating said elements together in hinged relation, said means including a socket disposed in one of said elements and a pin disposed in the other of said elements, said socket having an elongated aperture therein with a reduced cross-sectional portion extending along a length of said aperture and widening cross-sectional portions on opposite sides of said reduced cross-sectional portion, said pin being of non-circular cross-section and extending into said aperture in mating engagement with said reduced cross-sectional portion and in spaced relation to said widening cross-sectional portions.
Claim 3
Dependent Claim
30 words
A joint implant as set forth in claim 1 wherein said reduced cross-sectional portion of said aperture is of generally rectangular shape and said widening portions are of conical shape.
Claim 4
Dependent Claim
36 words
A joint implant as set forth in claim 1 wherein said pin has an axial length greater than the axial distance between said reduced cross-sectional portion and said widening cross-section portion closest to said other element.
Claim 5
Dependent Claim
21 words
A joint implant as set forth in claim 1 wherein said means includes an intermediate member having said socket formed therein.
Claim 6
Dependent Claim
23 words
A joint implant as set forth in claim 4 wherein said intermediate member is made of a material more resilient than said pin.
Claim 7
Dependent Claim
23 words
A joint implant as set forth in claim 4 wherein said intermediate member is received in tight-fit relation in said one anchoring element.
Claim 8
Dependent Claim
41 words
A joint implant as set forth in claim 4 wherein said means includes a joint member rotatably mounted on said one anchoring element, said joint member having a bore of rounded rectangular cross-section receiving said intermediate member therein a tight-fit relation.
Claim 9
Dependent Claim
24 words
A joint implant as set forth in claim 4 wherein said intermediate member has an outwardly extending flange at an end facing said pin.
Claim 10
Dependent Claim
17 words
A joint implant as set forth in claim 4 wherein said intermediate member is made of plastic.
Claim 11
Dependent Claim
38 words
A joint implant as set forth in claim 1 wherein said reduced cross-sectional portion is disposed at the center of said socket and said widening portions are disposed in symmetric relation on opposite sides of said reduced portion.
Claim 12
Dependent Claim
35 words
A joint implant as set forth in claim 1 wherein said reduced cross-sectional portion is disposed near said other element and said widening portions widen to different extents on opposite sides of said reduced portion.
Claim 13
Dependent Claim
29 words
A joint implant as set forth in claim 1 wherein said reduced cross-sectional portion has an axial length equal to or less than one-quarter the length of said pin.
Claim 14
Dependent Claim
125 words
A joint implant comprising a pair of anchoring elements, a joint member rotatably mounted on one of said anchoring elements about a pivot axis, said joint member having a bore of non-circular cross-section offset from and disposed on an axis perpendicular to said pivot axis; an intermediate member disposed in said bore in tight-fit relation, said member having a socket defining an elongated aperture with a reduced cross-sectional portion extending along a length of said aperture and widening cross-sectional portions on opposite sides of said reduced cross-sectional portion; and a pin of non-circular cross-section on the other of said anchoring elements, said pin being disposed in said socket in mating engagement with said reduced cross-sectional portion and in spaced relation to said widening cross-sectional portions.
Claim 15
Dependent Claim
125 words
A joint implant comprising a pair of anchoring elements, a joint member rotatably mounted on one of said anchoring elements about a pivot axis, said joint member having a bore of non-circular cross-section offset from and disposed on an axis perpendicular to said pivot axis; an intermediate member disposed in said bore in tight-fit relation, said member having a socket defining an elongated aperture with a reduced cross-sectional portion extending along a length of said aperture and widening cross-sectional portions on opposite sides of said reduced cross-sectional portion; and a pin of non-circular cross-section on the other of said anchoring elements, said pin being disposed in said socket in mating engagement with said reduced cross-sectional portion and in spaced relation to said widening cross-sectional portions.
Claim 16
Dependent Claim
110 words
A joint implant comprising a pair of anchoring elements, each element having a bore therein; a pair of intermediate members, each said member being disposed in a respective bore in tight-fit relation, each said member having a socket defining an elongated aperture with a reduced cross-sectional portion extending along a length of said aperture and widening cross-sectional portions on opposite sides of said reduced cross-sectional portion; and a joint member having a pair of hingedly connected components, each of said components having a pin of non-circular cross-section disposed in a respective socket in mating engagement with said reduced cross-sectional portion and in spaced relation to said widening cross-sectional portions thereof.
Claim 17
Dependent Claim
110 words
A joint implant comprising a pair of anchoring elements, each element having a bore therein; a pair of intermediate members, each said member being disposed in a respective bore in tight-fit relation, each said member having a socket defining an elongated aperture with a reduced cross-sectional portion extending along a length of said aperture and widening cross-sectional portions on opposite sides of said reduced cross-sectional portion; and a joint member having a pair of hingedly connected components, each of said components having a pin of non-circular cross-section disposed in a respective socket in mating engagement with said reduced cross-sectional portion and in spaced relation to said widening cross-sectional portions thereof.
References Cited (Backward Citations)
US3033624A
Cited
US3707006A
Cited
CH541963A
Cited
US3819288A
Cited
US3837009A
Cited
US3813700A
Cited
US3934272A
Cited
US4058856A
Cited
US4131957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-14 | 1983-07-16 | 1984-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-14 | 1987-07-16 | 1988-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-14 | 1991-07-16 | 1992-01-15 | $7700.00 | Window Closed / Lapsed |