US3863273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orthopedic prosthetic implant devices
Assignee: Kirschner Medical Corp
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Filing: 1973-09-20
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Granted: 1975-02-04
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Expires: 1993-09-20
Abstract
Abstract A prosthetic joint for use in replacement of the ball end of defective biological hip joints, the prosthetic joint including a head for insertion into and unattached seating in the socket member of the biological joint, a bearing insert in the head, the bearing insert having a spherical seat and being engaged in the head by a plurality of axially extending ridges on said head which engage with the bearing insert and prevent the bearing insert from rotating in the head, a ball shaped member seated in the spherical seat and having a diameter not more than 65 percent of the diameter of the head, the bearing insert including means for engaging the ball shaped member and for retaining such ball shaped member in the bearing insert while permitting pivotal universal movement of the ball shaped member and the attaching means in the bearing insert and means for attaching the ball shaped member to the shaft of an anatomical member of the joint being partially replaced with the prosthetic joint.
Inventors
- 👤 Robert G Averill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:26
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30037; A61F2002/30316; A61F2002/30329; A61F2002/30476; A61F2002/30487; A61F2002/305; A61F2002/30535; A61F2002/30594; A61F2002/30604; A61F2002/30616; A61F2002/30621; A61F2002/30649; A61F2002/30662; A61F2002/3208; A61F2002/3233; A61F2/36; A61F2/3609; A61F2002/3611; A61F2002/3625; A61F2002/3631; A61F2220/00; A61F2220/0025; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00029
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
216 words
An implantable prosthetic joint for use in replacement of the ball end of defective biological joints, said prosthetic joint including a head for insertion into and unattached seating in the socket member of the biological joint being partially replaced by said prosthesis, a bearing insert in said head, said bearing insert having a spherical seat, a ball shaped member seated in said spherical seat in said bearing insert, said bearing insert including means for engaging said ball shaped member and for retaining said ball shaped member in said bearing insert while permitting pivotal universal movement of said ball shaped member, means for engaging and retaining said ball shaped member in said bearing insert including a one-piece insert having a plurality of arcuate sections at the open edge of said insert which, when said head is removed, are flexible outwardly to allow said ball shaped member to be inserted into said spherical seat and which, when said ball shaped member is in said spherical seat, and said head is placed over said bearing insert, are engaged by said head for retaining said ball shaped member in said bearing insert, attaching means in said bearing insert and means for attaching said ball shaped member to the shaft of the second anatomical member of the joint being partially replaced.
Claim 2
Dependent Claim
216 words
An implantable prosthetic joint for use in replacement of the ball end of defective biological joints, said prosthetic joint including a head for insertion into and unattached seating in the socket member of the biological joint being partially replaced by said prosthesis, a bearing insert in said head, said bearing insert having a spherical seat, a ball shaped member seated in said spherical seat in said bearing insert, said bearing insert including means for engaging said ball shaped member and for retaining said ball shaped member in said bearing insert while permitting pivotal universal movement of said ball shaped member, means for engaging and retaining said ball shaped member in said bearing insert including a one-piece insert having a plurality of arcuate sections at the open edge of said insert which, when said head is removed, are flexible outwardly to allow said ball shaped member to be inserted into said spherical seat and which, when said ball shaped member is in said spherical seat, and said head is placed over said bearing insert, are engaged by said head for retaining said ball shaped member in said bearing insert, attaching means in said bearing insert and means for attaching said ball shaped member to the shaft of the second anatomical member of the joint being partially replaced.
Claim 3
Dependent Claim
34 words
A prosthetic joint as recited in claim 1, in which said means for engaging and retaining said ball shaped member in said bearing insert includes means for retaining said bearing insert in said head.
Claim 4
Dependent Claim
32 words
A prosthetic joint, as recited in claim 2, in which said means for retaining said bearing insert in said head includes a tab, said head having a recess for receiving said tab.
Claim 5
Dependent Claim
78 words
A prosthetic joint, as recited in claim 1 in which said means for attaching said ball shaped member to the shaft includes a neck portion having a cross-section smaller than the diameter of said ball shaped member, said neck portion being connected at one of its ends to said ball shaped member for engagement with said bearing insert for pivoting said head in said socket member of the biological joint when said neck portion engages said engagement means.
Claim 6
Dependent Claim
21 words
A prosthetic joint, as recited in claim 4, in which said engagement means includes a tapered surface on said bearing insert.
Claim 7
Dependent Claim
32 words
A prosthetic joint, as recited in claim 4, in which said head, said stem, said ball shaped member and said neck portion are of metal and said bearing insert is of plastic.
Claim 8
Dependent Claim
27 words
A prosthetic joint, as recited in claim 6, in which said metal is cobalt chrome molybdenum and said bearing insert is of an ultra-high molecular weight plastic.
Claim 9
Dependent Claim
38 words
A prosthetic joint, as recited in claim 7, in which said means for attaching said stem to said second of the two anatomical members includes a shaft for intramedullary attachment to said second of the two anatomical members.
Claim 10
Dependent Claim
40 words
A prosthetic joint, as recited in claim 1, in which said head has a plurality of axially extending bearing insert ridges and said bearing insert is engaged by said ridges for preventing said bearing insert from rotating in said head.
Claim 11
Dependent Claim
48 words
A prosthetic joint, as recited in claim 9, in which said head and said bearing insert include cooperating cylindrical and spherical shaped surfaces and said ridges on said head are on the cylindrical surface of said head and in engagement with the cylindrical surface on said bearing insert.
Claim 12
Dependent Claim
28 words
A prosthetic joint, as recited in claim 1, in which the diameter of said ball shaped member is not more than 65% of the diameter of said head.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |