US5489311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prosthesis with orientable bearing surface
Assignee: Joint Medical Products Corp
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Filing: 1994-01-21
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Granted: 1996-02-06
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Expires: 2014-01-21
Abstract
Abstract A prosthesis (13) for implantation in a patient's bone (2) is provided which has a metal fixation member (10), a metal orienting member (20) secured to the fixation member (10) by a self-locking taper (15,24), and a plastic bearing (30) which is secured to the orienting member (20) in a predetermined orientation. By means of this structure, the plastic bearing (30) can be given a desired orientation with regard to the metal fixation member (10) independent of the orientation of the fixation member (10) with respect to the patient's bone (2). Also, replacement and/or reorientation of the bearing (30) are facility. The prosthesis (13) can be used to form the tibial component of an artificial knee joint.
Inventors
- 👤 George B. Cipolletti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:13
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/46; A61F2/4603; A61F2/461; A61F2/38; A61F2/389; A61F2/4637; A61F2/4684; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30138; A61F2002/30143; A61F2002/30199; A61F2002/30205; A61F2002/30217; A61F2002/30224; A61F2002/30233; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30332; A61F2002/30433; A61F2002/30476; A61F2002/30487; A61F2002/305; A61F2002/30535; A61F2002/30537; A61F2002/30538; A61F2002/3054; A61F2002/30604; A61F2002/30617; A61F2/30767; A61F2/30771; A61F2002/30904; A61F2002/4619; A61F2002/4641; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2220/0041; A61F2230/00; A61F2230/0002; A61F2230/0017; A61F2230/0063; A61F2230/0067; A61F2230/0069; A61F2250/00; A61F2250/0058; A61F2250/0096; A61F2250/0097; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00029
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
158 words
A prosthesis for implantation in a bone, said prosthesis having a bearing surface and comprising a first member for implantation in the bone, a second member which mates with the first member through a self-locking taper, and a third member which carries the bearing surface, wherein: (a) the first member has a bore, a portion of which forms a female part of the self-locking taper; (b) the second member has an outer surface a portion of which forms a male part of the self-locking taper, said second member: (i) being receivable in the bore of the first member; and (ii) including means for rotating the second member within the bore of the first member prior to locking engagement of the self locking taper; and (c) the third member has means for engaging the second member in a predetermined angular orientation relative to the second member and for preventing the third member from rotating relative to the second member.
Claim 2
Dependent Claim
158 words
A prosthesis for implantation in a bone, said prosthesis having a bearing surface and comprising a first member for implantation in the bone, a second member which mates with the first member through a self-locking taper, and a third member which carries the bearing surface, wherein: (a) the first member has a bore, a portion of which forms a female part of the self-locking taper; (b) the second member has an outer surface a portion of which forms a male part of the self-locking taper, said second member: (i) being receivable in the bore of the first member; and (ii) including means for rotating the second member within the bore of the first member prior to locking engagement of the self locking taper; and (c) the third member has means for engaging the second member in a predetermined angular orientation relative to the second member and for preventing the third member from rotating relative to the second member.
Claim 3
Dependent Claim
27 words
The prosthesis of claim 1 wherein the second member includes a bore having a female thread formed therein for removing the second member from the first member.
Claim 4
Dependent Claim
18 words
The prosthesis of claim 1 further comprising a screw for securing the second member to the first member.
Claim 5
Dependent Claim
20 words
The prosthesis of claim 3 wherein the second member includes a bore and the screw is received within the bore.
Claim 6
Dependent Claim
22 words
The prosthesis of claim 1 wherein the third member's means for engaging and preventing rotation engages the second member's means for rotating.
Claim 7
Dependent Claim
45 words
A system comprising the prosthesis of claim 1 and an apparatus for implanting the prosthesis, said apparatus comprising: means for indicating the angular orientation of the second member relative to the first member; and means for releasably engaging the means for rotating the second member.
Claim 8
Dependent Claim
31 words
The system of claim 6 wherein the means for indicating and the means for releasably engaging are rotatably mounted on a drive member for locking the engagement of the self-locking taper.
Claim 9
Dependent Claim
33 words
The system of claim 6 wherein the means for indicating and the means for releasably engaging comprise a unitary element which is rotatably mounted on a drive means for locking the self-locking taper.
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) | 1999-02-05 | 1999-08-07 | 2000-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-05 | 2003-08-07 | 2004-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-05 | 2007-08-07 | 2008-02-06 | $7700.00 | Window Closed / Lapsed |