US5282864A
Expired / Lapsed
US
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Acetabular prosthesis having a metal socket bearing
Assignee: Joint Medical Products Corp
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Filing: 1992-02-19
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Granted: 1994-02-01
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Expires: 2012-02-19
Abstract
Abstract An acetabular prosthesis (8) having an orientable metal socket bearing (13) and a cup (10) for fixation to bone (6) is provided. The bearing (13) has a male taper (26) which locks into a corresponding female taper (28) formed in the cup (10). Two screws (15) are used to seat the bearing (13) in the cup (10) and to further secure the taper lock. The assembly of the apertures (4) through which bone screws (15) can pass to further secure the cup (10) to the patient's bone (6).
Inventors
- 👤 Douglas G. Noiles
- 👤 Alfred F. DeCarlo, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:34
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30721; A61F2/32; A61F2/34; A61F2/46; A61F2/4637; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61F2/0095; A61F2/4603; A61F2/4609; A61F2002/30001; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30332; A61F2002/30354; A61F2002/30433; A61F2002/30476; A61F2002/30507; A61F2002/30535; A61F2002/30537; A61F2002/30538; A61F2002/3054; A61F2002/30593; A61F2002/30667; A61F2002/30718; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30774; A61F2002/30784; A61F2002/30785; A61F2002/3082; A61F2002/30904; A61F2/3094; A61F2002/30975; A61F2002/3401; A61F2002/3403; A61F2002/3412; A61F2002/3414; A61F2002/3443; A61F2002/4641; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2220/0041; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00029; A61F2310/00179; A61F2310/00185; A61F2310/00203; A61F2310/00239
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
103 words
A prosthesis for use in forming an implantable ball and socket joint comprising: (a) a metal socket bearing having a cavity for receiving the ball of the ball and socket joint, said socket bearing having an external surface at least a portion of which comprises a male taper; and (b) a cup for fixation to bone, said cup having a cavity for receiving the metal socket bearing, said cavity having a surface at least a portion of which comprises a female taper for locking engagement with the male taper of the socket bearing, wherein said male and female tapers comprise a self-locking taper.
Claim 2
Dependent Claim
103 words
A prosthesis for use in forming an implantable ball and socket joint comprising: (a) a metal socket bearing having a cavity for receiving the ball of the ball and socket joint, said socket bearing having an external surface at least a portion of which comprises a male taper; and (b) a cup for fixation to bone, said cup having a cavity for receiving the metal socket bearing, said cavity having a surface at least a portion of which comprises a female taper for locking engagement with the male taper of the socket bearing, wherein said male and female tapers comprise a self-locking taper.
Claim 3
Dependent Claim
27 words
The prosthesis of claim 1 wherein the total included taper angle of the locking male and female tapers is between about six degrees and about seventeen degrees.
Claim 4
Dependent Claim
22 words
The prosthesis of claim 2 wherein the total included taper angle of the locking male and female tapers is about fourteen degrees.
Claim 5
Dependent Claim
17 words
The prosthesis of claim 1 further including means for driving the male taper into the female taper.
Claim 6
Dependent Claim
13 words
The prosthesis of claim 4 wherein the means for driving comprises a screw.
Claim 7
Dependent Claim
44 words
The prosthesis of claim 5 wherein the bearing includes a non-threaded slot having an open end and a closed end, the cup includes a threaded-slot, and the screw is received in an aperture formed by alignment of the non-threaded slot with the threaded slot.
Claim 8
Dependent Claim
54 words
The prosthesis of claim 6 wherein the cup includes a second threaded slot and the bearing includes a non-threaded slot having two open ends which can cooperate with the second threaded slot of the cup to form an aperture which will allow passage of the body but not the head of a bone screw.
Claim 9
Dependent Claim
25 words
The prosthesis of claim 7 wherein the thread of the second threaded slot prevents passage of the head of the bone screw through the aperture.
Claim 10
Dependent Claim
38 words
The prosthesis of claim 6 wherein the cup includes a plurality of threaded slots and the non-threaded slot of the bearing can be aligned with any one of said threaded slots to form an aperture for the screw.
Claim 11
Dependent Claim
45 words
The prosthesis of claim 9 wherein the bearing includes a non-threaded slot having two open ends which can cooperate with a threaded slot of the cup to form an aperture which will allow passage of the body but not the head of a bone screw.
Claim 12
Dependent Claim
24 words
The prosthesis of claim 10 wherein the thread of the threaded slot prevents passage of the head of the bone screw through the aperture.
Claim 13
Dependent Claim
26 words
The prosthesis of claim 1 including means for loosening the locking engagement between the male taper of the bearing and the female taper of the cup.
Claim 14
Dependent Claim
21 words
The prosthesis of claim 12 wherein the means for loosening comprises a groove formed in the external surface of the bearing.
Claim 15
Dependent Claim
13 words
The prosthesis of claim 1 wherein the metal socket bearing comprises two pieces.
Claim 16
Dependent Claim
17 words
The prosthesis of claim 14 including means for aligning the two pieces of the metal socket bearing.
Claim 17
Dependent Claim
25 words
The prosthesis of claim 15 wherein the means for aligning comprises a key on one of the pieces and a slot on the other piece.
Claim 18
Dependent Claim
140 words
A prosthesis for use in forming an implantable ball and socket joint comprising: (a) a metal socket bearing having a cavity for receiving the ball of the ball and socket joint, said socket bearing having an external surface which includes a first non-threaded slot having an open end and a closed end and a second non-threaded slot having two open ends: and (b) a cup for fixation to bone, said cup having a cavity for receiving the metal socket bearing, said cavity having a surface which includes two threaded slots wherein alignment of the first non-threaded slot of the bearing with one of said threaded slots forms a first aperture for a set screw and the alignment of the second non-threaded slot of the bearing with the other of said threaded slots forms a second aperture for a bone screw.
Claim 19
Dependent Claim
140 words
A prosthesis for use in forming an implantable ball and socket joint comprising: (a) a metal socket bearing having a cavity for receiving the ball of the ball and socket joint, said socket bearing having an external surface which includes a first non-threaded slot having an open end and a closed end and a second non-threaded slot having two open ends: and (b) a cup for fixation to bone, said cup having a cavity for receiving the metal socket bearing, said cavity having a surface which includes two threaded slots wherein alignment of the first non-threaded slot of the bearing with one of said threaded slots forms a first aperture for a set screw and the alignment of the second non-threaded slot of the bearing with the other of said threaded slots forms a second aperture for a bone screw.
Claim 20
Dependent Claim
23 words
The prosthesis of claim 17 wherein the second aperture will allow passage of the body but not the head of a bone screw.
Claim 21
Dependent Claim
25 words
The prosthesis of claim 18 wherein the thread of the other threaded slot prevents passage of the head of the bone screw through the aperture.
Claim 22
Dependent Claim
141 words
A prosthesis for use in forming an implantable ball and socket joint comprising: (a) a metal socket bearing having a cavity for receiving the ball of the ball and socket joint, said socket bearing having an external surface which includes a first non-threaded slot having an open end and a closed end and a second non-threaded slot having two open ends; and (b) a cup for fixation to bone, said cup having a cavity for receiving the metal socket bearing, said cavity having a surface which includes a plurality of threaded slots wherein alignment of the first non-threaded slot of the bearing with one of said threaded slots forms a first aperture for a set screw and the alignment of the second non-threaded slot of the bearing with another of said threaded slots forms a second aperture for a bone screw.
Claim 23
Dependent Claim
141 words
A prosthesis for use in forming an implantable ball and socket joint comprising: (a) a metal socket bearing having a cavity for receiving the ball of the ball and socket joint, said socket bearing having an external surface which includes a first non-threaded slot having an open end and a closed end and a second non-threaded slot having two open ends; and (b) a cup for fixation to bone, said cup having a cavity for receiving the metal socket bearing, said cavity having a surface which includes a plurality of threaded slots wherein alignment of the first non-threaded slot of the bearing with one of said threaded slots forms a first aperture for a set screw and the alignment of the second non-threaded slot of the bearing with another of said threaded slots forms a second aperture for a bone screw.
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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) | 1997-01-31 | 1997-08-02 | 1998-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-31 | 2001-08-02 | 2002-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-31 | 2005-08-02 | 2006-02-01 | $7700.00 | Window Closed / Lapsed |