Articulating surgical stapling instrument incorporating a firing mechanism

  • US 10,292,707 B2
  • Filed: 08/17/2017
  • Issued: 05/21/2019
  • Est. Priority Date: 07/28/2004
  • Status: Active Grant
First Claim
Patent Images

1. A surgical instrument comprising:

  • a handle portion operable to produce a firing motion;

    a shaft extending from the handle portion, wherein the shaft comprises an articulation joint; and

    an implement portion responsive to the firing motion from the handle portion, the implement portion comprising;

    an elongate channel coupled to the handle portion and including a channel slot;

    a staple cartridge received by the elongate channel and incorporating a proximally-positioned wedge member aligned to cam upward a driver supporting a staple;

    an anvil pivotally coupled to the elongate channel and including an anvil channel;

    a firing device including a distally-presented cutting edge longitudinally received between the elongate channel and the anvil, an upper member engageable to the anvil channel, a lower member engaging the channel slot, and a middle member operable to actuate the staple cartridge by distally translating the proximally-positioned wedge member of the staple cartridge during a staple firing stroke, the firing device positively engaging both the elongate channel and the anvil during longitudinal firing travel to provide spacing therebetween for staple formation; and

    a lockout disabled by the proximally-positioned wedge member, wherein the lockout permits the staple firing stroke when the lockout is disabled, and wherein the lockout prevents the staple firing stroke when the lockout is not disabled.

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