US3656184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial hip joint
Assignee: Individual
•
Filing: 1970-03-10
•
Granted: 1972-04-18
•
Expires: 1990-03-10
Abstract
Abstract An artificial hip joint comprising a socket member and an interfitting ball member, in which dislocation of the joint is positively prevented by retaining means forming part of the socket member. The retaining means are constituted by extensions of the socket member beyond its diametral plane which define an opening into the socket smaller than that of the socket at the diametral plane. The ball member is shaped to pass through the socket opening at one particular orientation, for fitting the parts together, but once in place and orientated in normal positions of use the ball member cannot be removed from the socket.
Inventors
- 👤 Harold Victor Chambers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:18
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2002/3233; A61F2/34; A61F2002/3429; A61F2002/3453; A61F2002/3454; A61F2002/348; A61F2002/3493; A61F2/3609; A61F2002/3611; A61F2002/3623; A61F2002/3625; A61F2002/3631; A61F2/46; A61F2002/4631; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32631; Y10T403/32713; Y10T403/32737; Y10T403/32778
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
259 words
A hip joint prosthesis comprising a socket member for insertion into the acetabulum of a pelvis, and a femural head prosthesis including a ball member rotatable in said socket member and shank means for securing said ball member to a femur, said socket member being of cup-like form having a generally hemi-spherical outer surface suitable for positioning and for being retained in the acetabulum, said socket member having an inner surface including a main substantially hemi-spherical portion terminating in a diametral plane and in which extension of said main portion form retaining means for the ball member, said retaining means defining an opening into the socket having an area smaller than that of the socket member at the said diametral plane, and in which said ball member has a mainly spherical surface fitting closely within said socket member, said ball member having a diametral area greater than that of the opening into the socket member whereby the ball member is normally held in the socket member by said retaining means, and the otherwise spherical surface of the ball member being relieved so that one diametral plane of said ball member is shaped and dimensioned to pass through said socket member opening, whereby with particular orientation of the ball member with respect to the socket member the ball member can be fitted into the socket member, said ball member being free to rotate within said socket member about the axis of said shank means except when implanted in a patient and thus restricted by natural restraints on the patients leg.
Claim 2
Dependent Claim
259 words
A hip joint prosthesis comprising a socket member for insertion into the acetabulum of a pelvis, and a femural head prosthesis including a ball member rotatable in said socket member and shank means for securing said ball member to a femur, said socket member being of cup-like form having a generally hemi-spherical outer surface suitable for positioning and for being retained in the acetabulum, said socket member having an inner surface including a main substantially hemi-spherical portion terminating in a diametral plane and in which extension of said main portion form retaining means for the ball member, said retaining means defining an opening into the socket having an area smaller than that of the socket member at the said diametral plane, and in which said ball member has a mainly spherical surface fitting closely within said socket member, said ball member having a diametral area greater than that of the opening into the socket member whereby the ball member is normally held in the socket member by said retaining means, and the otherwise spherical surface of the ball member being relieved so that one diametral plane of said ball member is shaped and dimensioned to pass through said socket member opening, whereby with particular orientation of the ball member with respect to the socket member the ball member can be fitted into the socket member, said ball member being free to rotate within said socket member about the axis of said shank means except when implanted in a patient and thus restricted by natural restraints on the patients leg.
Claim 3
Dependent Claim
44 words
A hip joint prosthesis according to claim 1, wherein said socket opening is circular, and wherein said ball member is relieved so as to present a cylindrical surface surrounding one circumference of the ball member and dimensioned to pass through the socket member opening.
Claim 4
Dependent Claim
19 words
A hip joint prosthesis according to claim 1, wherein said retaining means are formed integrally with the socket member.
Claim 5
Dependent Claim
44 words
A hip joint prosthesis according to claim 1, wherein said hemi-spherical portion of the socket member has an extension in the form of an integral annulus extending beyond said diametral plane of the socket member, parts of said annuLus constituting the said retaining means.
Claim 6
Dependent Claim
257 words
A hip joint prosthesis comprising a socket member for insertion into the acetabulum of a pelvis, and a femural head prosthesis including a ball member rotatable in said socket member and shank means for securing said ball member to a femur, said socket member being of cup-like form having a generally hemi-spherical outer surface suitable for positioning and for being retained in the acetabulum, said socket member having an inner surface including a main substantially hemi-spherical portion terminating in a diametral plane and in which extensions of said main portion form retaining means for said ball member, said retaining means defining a non-circular opening into said socket member having an area smaller than that of the socket member at the diametral plane, and in which said ball member has a mainly spherical surface fitting closely within said socket member, said ball member having a diameter greater than the smallest diameter of said non-circular opening whereby the ball member is normally retained in said socket member by said retaining means, and the otherwise spherical surface of the ball member being relieved so that one diametral plane of said ball member is shaped and dimensioned to pass through said non-circular opening, whereby with particular orientation of the ball member with respect to the socket member said ball member can be fitted into said socket member, said ball member being free to rotate within said socket member about the axis of said shank means except when implanted in a patient and thus restricted by natural restraints on the patient''s leg.
Claim 7
Dependent Claim
257 words
A hip joint prosthesis comprising a socket member for insertion into the acetabulum of a pelvis, and a femural head prosthesis including a ball member rotatable in said socket member and shank means for securing said ball member to a femur, said socket member being of cup-like form having a generally hemi-spherical outer surface suitable for positioning and for being retained in the acetabulum, said socket member having an inner surface including a main substantially hemi-spherical portion terminating in a diametral plane and in which extensions of said main portion form retaining means for said ball member, said retaining means defining a non-circular opening into said socket member having an area smaller than that of the socket member at the diametral plane, and in which said ball member has a mainly spherical surface fitting closely within said socket member, said ball member having a diameter greater than the smallest diameter of said non-circular opening whereby the ball member is normally retained in said socket member by said retaining means, and the otherwise spherical surface of the ball member being relieved so that one diametral plane of said ball member is shaped and dimensioned to pass through said non-circular opening, whereby with particular orientation of the ball member with respect to the socket member said ball member can be fitted into said socket member, said ball member being free to rotate within said socket member about the axis of said shank means except when implanted in a patient and thus restricted by natural restraints on the patient''s leg.
Claim 8
Dependent Claim
20 words
A hip joint prosthesis according to claim 5, in which said retaining means are formed integrally with the socket member.
Claim 9
Dependent Claim
43 words
A hip joint prosthesis according to claim 5, wherein said hemi-spherical portion of the socket member has an extension in the form of an integral annulus surrounding said diametral plane of the socket member, parts of said annulus constituting the said retaining means.
Claim 10
Dependent Claim
32 words
A hip joint prosthesis according to claim 5, wherein the non-circular opening has its major diameter at least as large as the internal diameter of the socket member at the diametral plane.
Claim 11
Dependent Claim
56 words
A hip joint prosthesis according to claim 5, wherein the non-circular opening defined in the socket member is oval, having a major diameter equal to the internal diameter of the socket at the diametral plane, and wherein the said diametral plane of the ball member is similarly shaped and is dimensioned to fit within said opening.
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |