US3772709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prosthetic joint
Assignee: Wright Medical Technology Inc
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Filing: 1972-06-15
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Granted: 1973-11-20
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Expires: 1992-06-15
Abstract
Abstract The prosthesis is surgically implanted in a joint and comprises a proximal and distal member hinged together for essentially unidirectional bending. The proximal member is rigid and includes a yoke portion. The distal member is flexible to provide limited pliability and includes a cylindrical header portion which fits within the yoke and is connected thereto by a pin.
Inventors
- 👤 A Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:53
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/38; A61F2/3804; A61F2002/30001; A61F2002/30621; A61F2002/30624; Y; Y10; Y10S; Y10S128/00; Y10S128/21
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
235 words
A prosthetic elbow joint for implanting in the intramedullary canals of the humerous and ulna comprising, in combination: a first member having a yoke, said yoke being generally U-shaped with a pair of spaced arms joined together by a web portion, said arms having means defining axially spaced openings in axial alignment with each other, and an intramedullary stem extending from said web portion of said yoke in a radial direction with respect to the axis of said openings away from said arms; a second member having a generally cylindrical shaped header portion positioned at least partially within said spaced arms, said header portion having means defining an opening extending through its axial width in alignment with the openings in said yoke, said second member having an intramedullary stem extending from said header in a generally radial direction with respect to the axis of said header opening; and a rigid pin positioned through said yoke and header in said openings forming a hinge, said first and second members being rotatable relative each other about the axis of said pin, one of said members being comprised of a rigid material, and the other of said members including its stem being comprised of a resilient pliable material whereby shear, torsion and other bending forces tending to cause the joint to bend in an unnatural manner will be absorbed without damage to the joint and surroundIng bone material.
Claim 2
Dependent Claim
235 words
A prosthetic elbow joint for implanting in the intramedullary canals of the humerous and ulna comprising, in combination: a first member having a yoke, said yoke being generally U-shaped with a pair of spaced arms joined together by a web portion, said arms having means defining axially spaced openings in axial alignment with each other, and an intramedullary stem extending from said web portion of said yoke in a radial direction with respect to the axis of said openings away from said arms; a second member having a generally cylindrical shaped header portion positioned at least partially within said spaced arms, said header portion having means defining an opening extending through its axial width in alignment with the openings in said yoke, said second member having an intramedullary stem extending from said header in a generally radial direction with respect to the axis of said header opening; and a rigid pin positioned through said yoke and header in said openings forming a hinge, said first and second members being rotatable relative each other about the axis of said pin, one of said members being comprised of a rigid material, and the other of said members including its stem being comprised of a resilient pliable material whereby shear, torsion and other bending forces tending to cause the joint to bend in an unnatural manner will be absorbed without damage to the joint and surroundIng bone material.
Claim 3
Dependent Claim
51 words
The combination according to claim 1 wherein said header opening is positioned off center with respect to the axis of said header portion, the axis of said header opening being spaced from the axis of said header portion in a direction away from said intramedullary stem extending from said header portion.
Claim 4
Dependent Claim
69 words
The combination according to claim 1 wherein the cross section of said pin corresponds to the cross section of said openings in said yoke whereby said pin fits snugly within the openings of said yoke such that said yoke does not rotate relative said pin, said header opening being larger in cross section than said pin so that said second portion rotates about said pin relative said first member.
Claim 5
Dependent Claim
77 words
The combination according to claim 1 wherein said other member is said second member and wherein said joint member includes a tubular sleeve extending the width of said header, said sleeve being positioned in said header opening, said pin being positioned through said sleeve whereby twisting and shearing forces on said joint are distributed evenly along the sleeve through said header portion, the rigidity of said sleeve being substantially greater than that of the said pliable member.
Claim 6
Dependent Claim
41 words
The combination according to claim 4 wherein said sleeve fits snugly within said header portion and said pin fits snugly within the openings within said yoke such that said second member and sleeve rotate jointly about said first member and pin.
Claim 7
Dependent Claim
38 words
The combination according to claim 4 wherein said first member and pin are comprised of a rigid metal, said second member is comprised of a flexible elastomeric, physiologically inert material, and said sleeve is comprised of a plastic.
Claim 8
Dependent Claim
15 words
The combination according to claim 6 wherein said second member is comprised of silicone rubber.
Claim 9
Dependent Claim
233 words
A prosthetic joint for implanting in the intramedullary canals of the adjacent bones comprising, in combination: a first member having a yoke, said yoke being generally U-shaped with a pair of spaced arms joined together by a web portion, said arms having means defining axially spaced openings in axial alignment with each other, and an intramedullary stem extending from said web portion of said yoke in a radial direction with respect to the axis of said openings away from said arms; a second member having a generally cylindrical shaped header portion positioned at least partially within said spaced arms, said header portion having means defining an opening extending through its axial width in alignment with the openings in said yoke, said second member having an intramedullary stem extending from said header in a generally radial direction with respect to the axis of said header opening; and a rigid pin positioned through said yoke and header in said openings forming a hinge, said first and second members being rotatable relative each other about the axis of said pin, one of said members being comprised of a rigid material, and the other of said members including its stem being comprised of a resilient pliable material whereby shear, torsion and other bending forces tending to cause the joint to bend in an unnatural manner will be absorbed without damage to the joint and surrounding bone material.
Claim 10
Dependent Claim
233 words
A prosthetic joint for implanting in the intramedullary canals of the adjacent bones comprising, in combination: a first member having a yoke, said yoke being generally U-shaped with a pair of spaced arms joined together by a web portion, said arms having means defining axially spaced openings in axial alignment with each other, and an intramedullary stem extending from said web portion of said yoke in a radial direction with respect to the axis of said openings away from said arms; a second member having a generally cylindrical shaped header portion positioned at least partially within said spaced arms, said header portion having means defining an opening extending through its axial width in alignment with the openings in said yoke, said second member having an intramedullary stem extending from said header in a generally radial direction with respect to the axis of said header opening; and a rigid pin positioned through said yoke and header in said openings forming a hinge, said first and second members being rotatable relative each other about the axis of said pin, one of said members being comprised of a rigid material, and the other of said members including its stem being comprised of a resilient pliable material whereby shear, torsion and other bending forces tending to cause the joint to bend in an unnatural manner will be absorbed without damage to the joint and surrounding bone material.
Claim 11
Dependent Claim
67 words
The combination according to claim 8 wherein the other of said members in said second member and wherein said joint further includes a tubular sleeve positioned in the opening of said header and extending the width thereof, said sleeve and header rotating jointly relative to said first member and pin about said pin, said sleeve being comprised of a material substantially more rigid than said second member.
References Cited (Backward Citations)
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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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |