07140528 is referenced by 472 patents and cites 31 patents.

A surgical instrument includes an E-beam firing bar engages the channel and selectively engages the anvil during distal firing movements, wherein the tissue is severed and stapled driven upward from the staple cartridge to form against the anvil. In particular, a wedge integral to the staple cartridge is driven distally by a middle pin of the firing bar to effect stapling. A single lockout of the staple channel responds to the presence of the wedge sled in its unfired position to allow the firing bar to fire. Otherwise, the single lockout prevents firing when the staple cartridge is missing or spent. Further, some versions include an Electroactive Polymer (EAP) actuator that presents an abutting surface, or acts as a trapdoor to a ramped recess in a staple channel to block the firing bar, as an active approach to preventing firing for one or more conditions.

Title
Surgical stapling instrument having an electroactive polymer actuated single lockout mechanism for prevention of firing
Application Number
11/66371
Publication Number
7140528 (B2)
Application Date
February 25, 2005
Publication Date
November 28, 2006
Inventor
Frederick E Shelton IV
Hillsboro
OH, US
Agent
Dean L Garner
Assignee
Ethicon Endo Surgery
OH, US
IPC
A61B 17/068
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