US4932961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical needle configuration with five-sided cross-section
Assignee: Ethicon Inc
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Filing: 1989-09-15
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Granted: 1990-06-12
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Expires: 2009-09-15
Abstract
Abstract A needle having three fluted edges, all of the same angular size. The needle presents a five sided cross-section at a tapered end. This results in easier tissue penetration, reduced cross-sectional needle area, better wound opening area performance, and minimized tissue distortion.
Inventors
- 👤 John Wong
- 👤 Thomas D. Maurer
- 👤 Robert Brown
- 👤 Robert J. Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:12
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/04; A61B17/06; A61B17/06066; A61B17/06004; A61B2017/06028
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
117 words
A surgical needle having a tapered cutting edge with a five-sided cross-section, said cross-section comprising: a flat upper surface forming a first side and having two ends, each said upper surface end forming a first and second fluted edge; the fluted edges being the second and third sides and approaching each other opposite said flat upper surface, said fluted edges having equal lengths; said fluted edges each ending at an angular connection to the fourth and fifth sides, said fourth and fifth sides angularly connected to form a third fluted edge; such that there is an indentation along said needle cross-section formed at both said first and third fluted edges and said second and third fluted edges.
Claim 2
Dependent Claim
117 words
A surgical needle having a tapered cutting edge with a five-sided cross-section, said cross-section comprising: a flat upper surface forming a first side and having two ends, each said upper surface end forming a first and second fluted edge; the fluted edges being the second and third sides and approaching each other opposite said flat upper surface, said fluted edges having equal lengths; said fluted edges each ending at an angular connection to the fourth and fifth sides, said fourth and fifth sides angularly connected to form a third fluted edge; such that there is an indentation along said needle cross-section formed at both said first and third fluted edges and said second and third fluted edges.
Claim 3
Dependent Claim
21 words
The surgical needle of claim 1 wherein the cross-sectional angles of said first, second and third fluted edges are all 45°.
Claim 4
Dependent Claim
38 words
The surgical needle of claim 2 wherein the cross sectional angles between said first and third fluted edges and said second and third fluted edges are equal and fall in the range from about 190° to about 240°.
Claim 5
Dependent Claim
23 words
The surgical needle of claim 3 wherein said needle forms a double concave surface with said upper surface enclosing said third fluted edge.
References Cited (Backward Citations)
US1599059A
Cited
US3038475A
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US3238942A
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US4513747A
Cited
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Cited
US4799484A
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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) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |