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US4047524A
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US
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Surgical implant spinal staple
Assignee: Smiths Healthcare Ltd
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Filing: 1976-04-26
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Granted: 1977-09-13
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Expires: 1996-04-26
Abstract
Abstract Surgical implant, known as a double-hole spinal staple for use in securing metal cables to vertebrae in operations for the correction of scoliosis.
Inventors
- 👤 John Emmett Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:20
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/70; A61B17/7001; A61B17/7044; A61B17/7002; A61B17/7019; A61B17/7022; Y; Y10; Y10S; Y10S411/00; Y10S411/92
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
159 words
A metal spinal staple substantially U-shaped in side view and capable of securing a pair of metal tensioning cables to a vertebra via spinal screws, which comprises: a pair of substantially parallel, perpendicularly offset laminar legs having free ends which are bevelled on the outer surfaces to terminate in a wedge shape, the parallel distance between said legs being such as to fit snugly over either side of a vertebra; an integral, substantially solid and rectangular laminar bridge portion extending perpendicularly between the diagonally opposed bases of said legs along its length, having a width greater than the width of each leg and having curved corners between said legs; and a pair of diagonally opposed spinal screw receiving apertures formed in said bridge portion proximate to said curved corners such that a line joining the centers of said apertures is inclined with respect to a line joining the centers of said legs in the plane of the bridge portion.
Claim 2
Dependent Claim
159 words
A metal spinal staple substantially U-shaped in side view and capable of securing a pair of metal tensioning cables to a vertebra via spinal screws, which comprises: a pair of substantially parallel, perpendicularly offset laminar legs having free ends which are bevelled on the outer surfaces to terminate in a wedge shape, the parallel distance between said legs being such as to fit snugly over either side of a vertebra; an integral, substantially solid and rectangular laminar bridge portion extending perpendicularly between the diagonally opposed bases of said legs along its length, having a width greater than the width of each leg and having curved corners between said legs; and a pair of diagonally opposed spinal screw receiving apertures formed in said bridge portion proximate to said curved corners such that a line joining the centers of said apertures is inclined with respect to a line joining the centers of said legs in the plane of the bridge portion.
Claim 3
Dependent Claim
26 words
An implant as claimed in claim 1, wherein the bridge portion is slightly convex in shape as viewed from the side thereof remote from the legs.
Claim 4
Dependent Claim
25 words
An implant as claimed in claim 1, wherein the bridge portion has a width that is two to three times the width of each leg.
Claim 5
Dependent Claim
22 words
An implant as claimed in claim 1, wherein the legs and the bridge portion each have a thickness of substantially 1 mm.
Claim 6
Dependent Claim
23 words
An implant as claimed in claim 1, wherein the distance between the insides of the two legs is from 20 to 30 mm.
Claim 7
Dependent Claim
12 words
An implant as claimed in claim 1, which is made of titanium.
References Cited (Backward Citations)
US2489870A
Cited
US3693616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |