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US5147376A
Expired / Lapsed
US
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Trocar needle laparoscopy with a threaded truncated cone bit
Assignee: Individual
•
Filing: 1991-05-02
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Granted: 1992-09-15
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Expires: 2011-05-02
Abstract
Abstract Trocar needle for laparoscopy with a truncated cone bit (1) having at its truncated cone end a cutting blade (2) with a rounded edge arranged obliquely to the axis of the needle and to the plane perpendicular to the axis of the needle which continues with a cutting thread (3) developing in a single turn around the truncated cone tip.
Inventors
- 👤 Francesco Pianetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:43
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/34; A61B17/3417; A61B2017/3454; A61B2017/3458
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
75 words
Trocar needle for laparoscopy with a threaded truncated cone bit (1) characterized in that it has at the truncated cone end a flat cutting blade (2) with rounded edge and arranged obliquely to the needle axis and the plane perpendicular to the needle axis and which continues with a cutting thread (3) developing in a single turn around the truncated cone bit and designed to penetrate the abdominal wall by a single rotation without pressure.
Claim 2
Dependent Claim
75 words
Trocar needle for laparoscopy with a threaded truncated cone bit (1) characterized in that it has at the truncated cone end a flat cutting blade (2) with rounded edge and arranged obliquely to the needle axis and the plane perpendicular to the needle axis and which continues with a cutting thread (3) developing in a single turn around the truncated cone bit and designed to penetrate the abdominal wall by a single rotation without pressure.
Claim 3
Dependent Claim
24 words
Trocar needle in accordance with claim 1 characterized in that the blade (2) forms an angle with the needle axis between 40° and 50°.
Claim 4
Dependent Claim
28 words
Trocar needle in accordance with claim 1 characterized in that the blade (2) forms an angle with the plane perpendicular to the needle axis between 40° and 50°.
Claim 5
Dependent Claim
18 words
Trocar needle in accordance with claim 1 characterized in that the thread (3) has a triangular cross section.
Claim 6
Dependent Claim
26 words
Trocar needle in accordance with claim 1 characterized in that an upper face (4) of the thread (3) forms a 90° angle with the needle axis.
References Cited (Backward Citations)
US4191191A
Cited
EP0373927A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-15 | 1996-03-16 | 1996-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-15 | 2000-03-16 | 2000-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-15 | 2004-03-16 | 2004-09-15 | $7700.00 | Window Closed / Lapsed |