US4237892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-beveled, v-shaped needle point
Assignee: Covidien AG
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Filing: 1979-02-16
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Granted: 1980-12-09
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Expires: 1999-02-16
Abstract
Abstract This invention relates to a surgical needle comprising a point and dual cutting blades. The point is defined by a symmetrical angle of width and an angle of slope. The needle point geometry and the dual cutting blades provide a flap incision and a reduction in the tissue penetration properties.
Inventors
- 👤 Thomas A. Ritter
- 👤 Leonard J. Laskowski
- 👤 Donald S. Kaplan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:09
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/04; A61B17/06; A61B17/06066
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
111 words
A surgical needle comprising a penetration portion initiating at a point defined by a symmetrical primary angle of width of about 20° to 35° and a secondary angle of width of about 5° to less than 20° and a primary angle of slope of about 20° to 35° and a secondary angle of slope of about 5° to 30°, with the proviso that the secondary angle of slope is always less than the primary angle of slope, and terminating in dual cutting blades providing four cutting edges and having a V-shaped cross-section and joined at the apex of said V-shape; a middle portion; and a butt portion having strand attachment means.
Claim 2
Dependent Claim
111 words
A surgical needle comprising a penetration portion initiating at a point defined by a symmetrical primary angle of width of about 20° to 35° and a secondary angle of width of about 5° to less than 20° and a primary angle of slope of about 20° to 35° and a secondary angle of slope of about 5° to 30°, with the proviso that the secondary angle of slope is always less than the primary angle of slope, and terminating in dual cutting blades providing four cutting edges and having a V-shaped cross-section and joined at the apex of said V-shape; a middle portion; and a butt portion having strand attachment means.
Claim 3
Dependent Claim
23 words
A needle of claim 1 wherein the primary angle of idth is about 30° and the secondary angle of width is about 10°.
Claim 4
Dependent Claim
23 words
A needle of claim 1 wherein the primary angle of slope is about 25° and the secondary angle of slope is about 10°.
Claim 5
Dependent Claim
19 words
A needle of claim 1 wherein the sides of the V-shaped cross-section has an included angle of about 60°.
Claim 6
Dependent Claim
57 words
A needle of claim 1 wherein the middle portion has a generally elliptical cross-section which is flattened on opposite sides; said sides being substantially parallel to each other and to the major axis of the generally elliptical cross-section; said axis being substantially parallel to a line which connects the two outermost cutting edges of said V-shaped cross-section.
Claim 7
Dependent Claim
13 words
A needle of claim 1 wherein the middle portion has a V-shape cross-section.
Claim 8
Dependent Claim
13 words
A needle of claim 1 wherein the penetration and middle portion are curved.
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) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |