US5545150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trocar
Assignee: Covidien AG
•
Filing: 1994-05-06
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Granted: 1996-08-13
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Expires: 2014-05-06
Abstract
Abstract A trocar is formed from a cannula and an interfitting obturator for penetrating body cavity walls in laparoscopic and endoscopic surgery. The obturator is provided with an improved piercing tip having a pointed blade and an improved double locking blunt nosed shield design. Hydrophilic coatings or components are also employed on the shield and cannula to facilitate quicker shield action covering the pointed blade and ease of entry of the cannula tube through the body cavity wall. The cannula also has an improved inexpensive flexible flapper valve and can be manufactured with a reusable cannula tube but disposable flapper valve assembly to minimize cost.
Inventors
- 👤 John K. Danks
- 👤 Richard V. Mazzola
- 👤 Thomas R. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:08
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/34; A61B17/3498; A61B17/3494; A61B17/3496; A61B17/3417; A61B17/3474; A61B2017/0023; A61B2017/00831; A61B2017/0084; A61B2017/3454; A61B2017/346; A61B2017/348; A61B2017/3482; A61B2017/349
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
122 words
A cannula comprising: (a) a cannula tube with an outer surface and an interior lumen, and having a distal end and a proximate end, said proximate end forming a cannula handle; (b) a gland retainer fitted adjacent to the proximate end of said cannula tube and substantially within the cannula handle, said gland retainer having a distal end and a proximate end; (c) a flapper valve mounted on said gland retainer distal end, wherein the flapper valve comprises an outer casing, a hinge, and a flapper and wherein at least the outer casing and the hinge of said flapper valve are integrally fabricated from an elastomeric material; and (d) a cap releasably fastened to the cannula handle thereby confining said gland retainer.
Claim 2
Dependent Claim
122 words
A cannula comprising: (a) a cannula tube with an outer surface and an interior lumen, and having a distal end and a proximate end, said proximate end forming a cannula handle; (b) a gland retainer fitted adjacent to the proximate end of said cannula tube and substantially within the cannula handle, said gland retainer having a distal end and a proximate end; (c) a flapper valve mounted on said gland retainer distal end, wherein the flapper valve comprises an outer casing, a hinge, and a flapper and wherein at least the outer casing and the hinge of said flapper valve are integrally fabricated from an elastomeric material; and (d) a cap releasably fastened to the cannula handle thereby confining said gland retainer.
Claim 3
Dependent Claim
23 words
The cannula of claim 1 wherein the outer casing, hinge and flapper of the flapper valve are integrally fabricated from an elastomeric material.
Claim 4
Dependent Claim
17 words
The cannula of claim 2 wherein said flapper further comprises a relatively hard surfaced centrally disposed button.
Claim 5
Dependent Claim
40 words
The cannula of claim 1 wherein the flapper valve is comprised of an outer casing having two inward facing lips defining a channel, and wherein the gland retainer distal end has a raised edge which is received within said channel.
Claim 6
Dependent Claim
107 words
A cannula comprising: (a) a cannula tube with an outer surface and an interior lumen, and having a distal end and a proximate end; (b) a gland retainer fitted partially within the proximate end of said cannula tube, said gland retainer having a distal end and a proximate end; (c) a flapper valve mounted on said gland retainer distal end, said flapper valve comprising an outer casing, a hinge and a flapper and wherein at least the outer casing and the hinge of said flapper valve are integrally fabricated from an elastomeric material; and (d) a cap releasably fastened to the proximate end of the gland retainer.
Claim 7
Dependent Claim
107 words
A cannula comprising: (a) a cannula tube with an outer surface and an interior lumen, and having a distal end and a proximate end; (b) a gland retainer fitted partially within the proximate end of said cannula tube, said gland retainer having a distal end and a proximate end; (c) a flapper valve mounted on said gland retainer distal end, said flapper valve comprising an outer casing, a hinge and a flapper and wherein at least the outer casing and the hinge of said flapper valve are integrally fabricated from an elastomeric material; and (d) a cap releasably fastened to the proximate end of the gland retainer.
Claim 8
Dependent Claim
17 words
The cannula of claim 5 further comprising a wiper seal mounted on said gland retainer proximate end.
Claim 9
Dependent Claim
56 words
The cannula of claim 6 wherein the wiper seal is comprised of a membrane and an outer casing, said outer casing having a first raised inward facing lip supporting said membrane and a second raised inward facing lip defining a channel, and wherein said gland retainer has a raised edge which is received within said channel.
Claim 10
Dependent Claim
23 words
The cannula of claim 5 wherein the outer casing, hinge and flapper of the flapper valve are integrally fabricated from an elastomeric material.
Claim 11
Dependent Claim
17 words
The cannula of claim 8 wherein said flapper further comprises a relatively hard surfaced centrally disposed button.
Claim 12
Dependent Claim
38 words
The cannula of claim 5 wherein the flapper valve is comprised of an outer casing having two inward facing lips defining a channel, and wherein the gland retainer has a raised edge which is received within said channel.
Claim 13
Dependent Claim
22 words
The cannula of claim 5 wherein the gland retainer interfits concentrically within the cap and the proximate end of the cannula tube.
Claim 14
Dependent Claim
19 words
The cannula of claim 5 wherein the distal end of said cannula tube is provided with a hydrophilic coating.
Claim 15
Dependent Claim
24 words
The cannula of claim 5 wherein the cannula tube is manufactured from a metal selected from the group of stainless steel and titanium alloys.
Claim 16
Dependent Claim
17 words
The cannula of claim 5 wherein the gland retainer is disposable. opposite that shown in FIG. 4A
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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) | 1999-08-13 | 2000-02-12 | 2000-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-13 | 2004-02-12 | 2004-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-13 | 2008-02-12 | 2008-08-13 | $7700.00 | Window Closed / Lapsed |