US5452837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical stapler with tissue gripping ridge
Assignee: Ethicon Endo Surgery Inc
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Filing: 1994-12-05
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Granted: 1995-09-26
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Expires: 2014-12-05
Abstract
Abstract An improved surgical stapler is disclosed having a tissue gripping ridge on at least one of the tissue contacting surfaces. The tissue contact surfaces are preferably displayed on both the anvil and the cartridge surfaces of the surgical stapler. The tissue gripping ridges preferably have serrated surfaces which mesh when in contact with each other to hold the tissue. The preferred embodiment of this invention describes the tissue gripping ridges along the periphery of the anvil and cartridge tissue contact surfaces. Another embodiment describes the tissue gripping ridges adjacent to the longitudinal knife slot.
Inventors
- 👤 Warren P. Williamson, IV
- 👤 Leo J. Nolan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:15
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/068; A61B17/072; A61B17/07207; A61B2017/07214; A61B17/28; A61B17/29; A61B2017/2926
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
185 words
An improved surgical stapler of the type having a cartridge containing a plurality of slots for carrying surgical staples, said cartridge having a tissue contacting surface thereon, and an anvil for forming said staples, said anvil having a staple forming surface thereon facing said tissue contacting surface, each of said tissue contacting surface and said staple forming surface having a perimeter defined by an external peripheral boundary bordering each of said surfaces, at least one of said anvil and said cartridge being movable toward the other for gripping bodily tissue therebetween; the improvement wherein tissue gripping ridges are displayed substantially along said perimeter of each of said tissue contacting surface of said cartridge and said staple forming surface of said anvil, said tissue contacting surface and said staple forming surface each have a longitudinal axis, and said tissue gripping ridges extend parallel to said longitudinal axis of each of said tissue contacting surface and said staple forming surface for a portion thereof, and transversely to said axes at a distal end of said tissue contacting surface and said staple forming surface for a portion thereof.
Claim 2
Dependent Claim
185 words
An improved surgical stapler of the type having a cartridge containing a plurality of slots for carrying surgical staples, said cartridge having a tissue contacting surface thereon, and an anvil for forming said staples, said anvil having a staple forming surface thereon facing said tissue contacting surface, each of said tissue contacting surface and said staple forming surface having a perimeter defined by an external peripheral boundary bordering each of said surfaces, at least one of said anvil and said cartridge being movable toward the other for gripping bodily tissue therebetween; the improvement wherein tissue gripping ridges are displayed substantially along said perimeter of each of said tissue contacting surface of said cartridge and said staple forming surface of said anvil, said tissue contacting surface and said staple forming surface each have a longitudinal axis, and said tissue gripping ridges extend parallel to said longitudinal axis of each of said tissue contacting surface and said staple forming surface for a portion thereof, and transversely to said axes at a distal end of said tissue contacting surface and said staple forming surface for a portion thereof.
Claim 3
Dependent Claim
26 words
The stapler of claim 1 wherein said tissue gripping ridges extend the entire length of each of said tissue contacting surface and said staple forming surface.
Claim 4
Dependent Claim
13 words
The stapler of claim 2 wherein said tissue gripping ridges have serrated surfaces.
Claim 5
Dependent Claim
27 words
The stapler of claim 3 wherein said tissue gripping ridge of said tissue contacting surface is opposed to said tissue gripping ridge of said staple forming surface.
Claim 6
Dependent Claim
32 words
The stapler of claim 4 wherein said opposed serrated surfaces of said tissue gripping ridges on said tissue contacting surface and said staple forming surface indirectly mesh when tissue is gripped therebetween.
Claim 7
Dependent Claim
25 words
The stapler of claim 5 wherein said cartridge has two offset double rows of said slots, said double rows divided by a longitudinal knife slot.
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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) | 1998-09-25 | 1999-03-27 | 1999-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-25 | 2003-03-27 | 2003-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-25 | 2007-03-27 | 2007-09-26 | $7700.00 | Window Closed / Lapsed |