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Expandable anvil surgical stapler

  • US 4,505,414 A
  • Filed: 10/12/1983
  • Issued: 03/19/1985
  • Est. Priority Date: 10/12/1983
  • Status: Expired due to Fees
First Claim
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1. A surgical stapler for stapling two or more layers of tissue together, comprising:

  • a frame having a staple end and an opposed, handle, end;

    an anvil connected to the end of the frame for slidable motion with respect thereto, the anvil having at least one anvil strut having anvil heads thereon for engaging and bending staples forced against the anvil heads;

    the anvil struts and anvil heads being movable between a collapsed position wherein the anvil struts and anvil heads are drawn radially inward, and an extended position wherein the anvil heads are extended radially outward to engage and bend staples;

    means for adjustably moving the anvil heads between the collapsed and extended positions; and

    staple driving means adjacent to the anvil for driving staples through layers of tissue and against the anvil heads to crimp the staples and secure the layers of tissue together.

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