US3694820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prosthetic shoulder joint
Assignee: National Research Development Corp UK
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Filing: 1970-07-29
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Granted: 1972-10-03
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Expires: 1990-07-29
Abstract
Abstract A prosthetic scapular device is provided having a generally cupshaped member, normally of a hemispherical form at least internally, and intracancellous fixation means extending from approximately one half only of the outer surface of the cup. The fixation means, normally in the form of mutually divergent spikes, include long members extending from points adjacent the central radial plane of the relevant cup half and diverge in the same sense from such plane, together with short members on opposite sides of such plane. Preferably, the long members increase in length and divergence from said plane as they approach the cup rim.
Inventors
- 👤 John Tracey Scales
- 👤 David Goddard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:45
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/40; A61F2/4059; A61F2/4081; A61F2002/30001; A61F2002/30316; A61F2002/30535; A61F2002/30574; A61F2/30767; A61F2/30771; A61F2002/30878; A61F2002/30891; A61F2002/30894; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00029
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
203 words
A prosthetic device for use as a human shoulder joint replacement, which device is designed to be used together with a self-hardening or self-curing gap-filling agent within cavities cut in the bone of the scapular glenoid and humerus, comprising: a scapular glenoid first bearing member having a partspherically shaped first bearing surface; intracancellous first fixation means connected or integrally formed with said first member; said first fixation means projecting from said first member along a succession of points adjacent a symmetrically disposed radial plane of said first surface, said succession of points extending between a central portion and one edge portion of said first member as intersected by said plane, said first fixation means projecting further from said member at said one edge portion than from said central portion, and said first fixation means diverging from said plane to one side thereof with increasing projection from said first member; a humeral second bearing member having a part-spherically shaped second bearing surface complementary to and rotatably received by said first bearing surface; and intra-medullary second fixation means connected or integrally formed with said second member; said second fixation means including an elongate tapered projecting from said second member to terminate in a tapered stem.
Claim 2
Dependent Claim
203 words
A prosthetic device for use as a human shoulder joint replacement, which device is designed to be used together with a self-hardening or self-curing gap-filling agent within cavities cut in the bone of the scapular glenoid and humerus, comprising: a scapular glenoid first bearing member having a partspherically shaped first bearing surface; intracancellous first fixation means connected or integrally formed with said first member; said first fixation means projecting from said first member along a succession of points adjacent a symmetrically disposed radial plane of said first surface, said succession of points extending between a central portion and one edge portion of said first member as intersected by said plane, said first fixation means projecting further from said member at said one edge portion than from said central portion, and said first fixation means diverging from said plane to one side thereof with increasing projection from said first member; a humeral second bearing member having a part-spherically shaped second bearing surface complementary to and rotatably received by said first bearing surface; and intra-medullary second fixation means connected or integrally formed with said second member; said second fixation means including an elongate tapered projecting from said second member to terminate in a tapered stem.
Claim 3
Dependent Claim
87 words
A device according to claim 1 wherein said fixation means project from said first bearing member by distances in the range of about 1/2 inch to 1 inch, the divergence of said first fixation means increases in the range of about 9* to 13* relative to said plane with progression along said succession of points towards said edge portion, and said second fixation means projects from said second bearing member while turning through an angle of about 45* relative to the Longitudinal axis of said tapered stem.
Claim 4
Dependent Claim
178 words
A prosthetic device for use as a scapular glenoid replacement, which device is designed to be used together with a self-hardening or self-curing gap-filling agent within cavities cut in the bone of the scapular, which device comprises: a cup to act as a scapular glenoid replacement and having a part-spherically shaped inner surface, a generally convex outer surface, and a rim joining said inner and outer surfaces; intracancellous fixation means connected or integrally formed with said cup and for bonding in said gap-filling agent; said fixation means projecting from said outer surface along a succession of points adjacent a plane which is radially and symmetrically disposed relative to said inner surface; said succession of points extending between a central portion of said outer surface and an edge portion of said outer surface where said plane makes one intersection with said rim; said fixation means projecting further from said outer surface at said edge portion than from said central portion; and said fixation means diverging from said plane to one side thereof with increasing projection from said outer surface.
Claim 5
Dependent Claim
178 words
A prosthetic device for use as a scapular glenoid replacement, which device is designed to be used together with a self-hardening or self-curing gap-filling agent within cavities cut in the bone of the scapular, which device comprises: a cup to act as a scapular glenoid replacement and having a part-spherically shaped inner surface, a generally convex outer surface, and a rim joining said inner and outer surfaces; intracancellous fixation means connected or integrally formed with said cup and for bonding in said gap-filling agent; said fixation means projecting from said outer surface along a succession of points adjacent a plane which is radially and symmetrically disposed relative to said inner surface; said succession of points extending between a central portion of said outer surface and an edge portion of said outer surface where said plane makes one intersection with said rim; said fixation means projecting further from said outer surface at said edge portion than from said central portion; and said fixation means diverging from said plane to one side thereof with increasing projection from said outer surface.
Claim 6
Dependent Claim
43 words
A device according to claim 3 wherein the divergence of said fixation means from said plane increases with progression along said succession of points toward said edge portion, said divergence being in the range of about 9* to 13* relative to said plane.
Claim 7
Dependent Claim
27 words
A device according to claim 3 wherein said fixation means comprise a plurality of spike-like members, the geometrical projections of which in said plane are mutually divergent.
Claim 8
Dependent Claim
55 words
A device according to claim 3 wherein said fixation means project from said cup by distances in the range of about 1/2 inch to 1 inch, and further comprising relatively shorter fixation means projecting from said cup outer surface adjacent the first-mentioned fixation means and on both sides thereof relative to said succession of points.
Claim 9
Dependent Claim
73 words
A device according to claim 4 in combination with prosthetic humeral device comprising a head part having a spherically shaped bearing surface complementary to and received in said cup inner surface, and a fixation member projecting from said head part through a neck portion and terminating in a tapered stem, the longitudinal axis of said stem being disposed at about 45* inclination relative to that of said neck portion adjoining said head part.
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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |