Patent US5894979A successfully refreshed from Google Patents.
US5894979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical stapler with anvil sensor and lockout
Assignee: United States Surgical Corp
•
Filing: 1995-06-02
•
Granted: 1999-04-20
•
Expires: 2015-06-02
Abstract
Abstract A surgical stapler is provided for applying linear parallel rows of staples. The stapler includes an anvil retention portion, a cartridge retention portion, a replaceable anvil, a cartridge housing and a blocking member. The blocking member is movable between a free-movement position and a blocking position. In the free-movement position, the blocking member permits movement of the cartridge retention portion and the anvil retention portion between open and closed positions. In the blocking position, the blocking member prevents movement of the anvil retention portion and the cartridge retention portion between the open and closed positions.
Inventors
- 👤 August L. Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:19
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/068; A61B17/072; A61B17/07207; A61B2017/07214; A61B90/00; A61B90/08; A61B2090/0801
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
254 words
A surgical stapler comprising: (a) a replaceable anvil having a staple forming surface; (b) a cartridge retention portion and an anvil retention portion the anvil retention portion being configured to receive said replaceable anvil, said cartridge retention portion and said anvil retention portion being operatively connected for relative movement relatively movable between a closed position in which said cartridge retention portion and said anvil retention portion are in closely spaced relationship for clamping tissue to be stapled therebetween and an open position in which said cartridge retention portion and said anvil retention portion are spaced farther from each other than in the closed position; (c) a cartridge housing supporting staples therein, said cartridge retention portion being adapted to receive said cartridge housing; (d) a firing assembly operatively associated with said cartridge housing and being movable between a pre-fired and a fired position to eject the staples from said cartridge housing; and (e) a blocking member being mounted between the cartridge retention portion and the anvil retention portion for movement between a free-movement position which affords movement of said cartridge retention portion and said anvil retention portion between the open and closed positions and a blocking position which prevents said cartridge retention portion and said anvil retention portion from being moved from the open position to the closed position, said blocking member being positioned to be engaged by said replaceable anvil to move said blocking member from said blocking position to said free-movement position when said replaceable anvil is received on said anvil retention portion.
Claim 2
Dependent Claim
254 words
A surgical stapler comprising: (a) a replaceable anvil having a staple forming surface; (b) a cartridge retention portion and an anvil retention portion the anvil retention portion being configured to receive said replaceable anvil, said cartridge retention portion and said anvil retention portion being operatively connected for relative movement relatively movable between a closed position in which said cartridge retention portion and said anvil retention portion are in closely spaced relationship for clamping tissue to be stapled therebetween and an open position in which said cartridge retention portion and said anvil retention portion are spaced farther from each other than in the closed position; (c) a cartridge housing supporting staples therein, said cartridge retention portion being adapted to receive said cartridge housing; (d) a firing assembly operatively associated with said cartridge housing and being movable between a pre-fired and a fired position to eject the staples from said cartridge housing; and (e) a blocking member being mounted between the cartridge retention portion and the anvil retention portion for movement between a free-movement position which affords movement of said cartridge retention portion and said anvil retention portion between the open and closed positions and a blocking position which prevents said cartridge retention portion and said anvil retention portion from being moved from the open position to the closed position, said blocking member being positioned to be engaged by said replaceable anvil to move said blocking member from said blocking position to said free-movement position when said replaceable anvil is received on said anvil retention portion.
Claim 3
Dependent Claim
19 words
A surgical stapler according to claim 1 including biasing means for biasing said blocking member toward the blocking position.
Claim 4
Dependent Claim
21 words
A surgical stapler according to claim 1 wherein said firing assembly comprises a T-bar and pusher for substantially simultaneously firing staples.
Claim 5
Dependent Claim
79 words
A surgical stapler according to claim 1 wherein said cartridge retention portion comprises a notch, said blocking member comprises first and second rocker arms, said second rocker arm having a detent surface adapted to be received in said notch of said cartridge retention portion when said blocking member is in said blocking positions and said first rocker arm having anvil sensing surfaces adapted to engage said replaceable anvil when said replaceable anvil is seated on said anvil retention portion.
Claim 6
Dependent Claim
73 words
A surgical stapler according to claim 4 wherein said first rocker arm has a cam surface, said second rocker arm has a cam follower surface such that when said replaceable anvil is seated on said anvil retention portion, said cam surface engages said cam follower surface to move said detent surface from said notch in said cartridge retention portion to afford movement of said cartridge and anvil retention portions toward their closed positions.
Claim 7
Dependent Claim
19 words
A surgical stapler according to claim 1 wherein said firing assembly includes a pusher for substantially sequentially firing staples.
Claim 8
Dependent Claim
147 words
A surgical stapler according to claim 6 wherein the stapler further includes a locking member for moving the cartridge and anvil retention portions between the open and closed positions, means pivotally mounting the blocking member in a cavity in the anvil retention portion, said blocking member having a locking member engagement surface such that when the blocking member is in the blocking position, the locking member engagement surface abuts the locking member to prevent the locking member from moving the cartridge and anvil retention portions from the open position toward the closed position, and such that when the blocking member is in the free-movement position, the locking member engagement surface is spaced from the locking member and affords movement of the cartridge and anvil retention portions from the open position toward the closed position, and a biasing means for biasing the blocking member toward the blocking position.
Claim 9
Dependent Claim
53 words
A surgical stapler according to claim 7 wherein the blocking member comprises an anvil sensing surface for engaging a surface on the anvil to move the blocking member against the bias of the biasing means from the blocking position to the free-movement position when the anvil is placed on the anvil retention portion.
References Cited (Backward Citations)
US2174219A
Cited
US2246647A
Cited
US3080564A
Cited
US3079608A
Cited
US3079606A
Cited
US3252643A
Cited
US3490675A
Cited
US3499591A
Cited
US3499591B1
Cited
US3675688A
Cited
US3692224A
Cited
US3844289A
Cited
US4086926A
Cited
DE2744824A1
Cited
US4304236A
Cited
US4207898A
Cited
US4256251A
Cited
US4202480A
Cited
US4391401A
Cited
US4331276A
Cited
US4520817A
Cited
GB2070499A
Cited
US4480640A
Cited
US4354628A
Cited
US4576167A
Cited
US4513746A
Cited
US4415112A
Cited
EP0273468A2
Cited
US4592498A
Cited
US4523695A
Cited
US4473077A
Cited
US4519532A
Cited
FR2542188A1
Cited
US4569346A
Cited
US4522327A
Cited
US4527724A
Cited
GB2141066A
Cited
US4540110A
Cited
US4500025A
Cited
EP0136950A2
Cited
USD283733S
Cited
US4610383A
Cited
US4605004A
Cited
US4591085A
Cited
US4585153A
Cited
US4573622A
Cited
US4580712A
Cited
US4566620A
Cited
US4767044A
Cited
AU5476486A
Cited
AU5476586A
Cited
US4807628A
Cited
US4597517A
Cited
US4665916A
Cited
EP0213817A1
Cited
US4869414A
Cited
US4728020A
Cited
EP0220029A1
Cited
US4715520A
Cited
CA1284551C
Cited
AU7219687A
Cited
US4821942A
Cited
US4941623A
Cited
EP0449394A2
Cited
US4848637A
Cited
US4930503A
Cited
US4938408A
Cited
US4964559A
Cited
US5018657A
Cited
EP0324638A1
Cited
US5071052A
Cited
USRE34519E
Cited
EP0380025A2
Cited
US5318221A
Cited
US5106008A
Cited
US5031814A
Cited
US4955959A
Cited
US5100042A
Cited
US5253793A
Cited
US5156315A
Cited
US5190203A
Cited
US5129570A
Cited
US5470009A
Cited
US5445304A
Cited
WO1992010976A1
Cited
US5458279A
Cited
US5413267A
Cited
EP0537571A2
Cited
EP0537572A2
Cited
US5509596A
Cited
US5307976A
Cited
US5332142A
Cited
EP0539762A1
Cited
US5395034A
Cited
EP0545029A1
Cited
US5465896A
Cited
EP0579038A1
Cited
EP0593920A1
Cited
EP0598202A1
Cited
US5470008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-04-19 | 2002-10-19 | 2003-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-04-19 | 2006-10-19 | 2007-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-04-19 | 2010-10-19 | 2011-04-20 | $7700.00 | Window Closed / Lapsed |