Anvil assemblies with collapsible frames for circular staplers

  • US 9,980,713 B2
  • Filed: 01/08/2015
  • Issued: 05/29/2018
  • Est. Priority Date: 03/14/2011
  • Status: Active Grant
First Claim
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1. A collapsible anvil assembly for a circular stapling instrument, said collapsible anvil assembly comprising:

  • an anvil plate assembly comprising a plurality of anvil plates movably coupled together for selective movement between a collapsed orientation and an expanded orientation wherein said plurality of anvil plates form an annular staple forming surface when in said expanded orientation;

    an anvil shaft including a shaft body and a distal end and a proximal end, said proximal end configured for removable operable attachment to the circular stapling instrument; and

    a plurality of anvil support arms, each said anvil support arm comprising a support arm body and a first end that is movably attached to said distal end of said anvil shaft, each said support arm body terminating in a second end, each said anvil support arm movable from an insertion position wherein said second end thereof is adjacent to a portion of said shaft body and an expanded support position wherein said support arm bodies are substantially coplanar with each other, each said second end configured for removable attachment to said anvil plate assembly when said plurality of anvil support arms are in said expanded support position and said anvil plates are in said expanded orientation.

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