Surgical instruments with closure stroke reduction arrangements

  • US 10,470,764 B2
  • Filed: 02/09/2016
  • Issued: 11/12/2019
  • Est. Priority Date: 02/09/2016
  • Status: Active Grant
First Claim
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1. A surgical instrument, comprising:

  • a surgical end effector comprising a first law and a second law, wherein one of said first law and said second law is selectively movable relative to the other of said first law and said second law upon application of a closure motion to said surgical end effector; and

    an elongate shaft assembly, comprising;

    a closure member assembly comprising;

    a proximal closure member configured to be axially advanced a complete closure stroke distance upon application of a closure actuation motion thereto; and

    a distal closure member movably interfacing with said proximal closure member such that said distal closure member moves an axial closure distance in response to axial movement of said proximal closure member through said complete closure stroke distance to thereby cause said distal closure member to apply said closure motion to said surgical end effector, wherein said axial closure distance is less than said complete closure stroke distance;

    wherein said proximal closure member comprises a distal end and wherein said distal closure member comprises a proximal end that is slidably affixed to said distal end of said proximal closure member such that, as said proximal closure member moves through said complete closure stroke distance, said distal closure member does not begin to axially move through said axial closure distance until said proximal closure member has axially moved through a portion of said complete closure stroke distance;

    wherein said elongate shaft assembly comprises a spine assembly coupled to said surgical end effector, wherein said proximal closure member comprises a proximal closure sleeve supported on a portion of said spine assembly for axial travel through said complete closure stroke distance thereon, and wherein said distal closure member comprises a distal closure sleeve slidably journaled on another portion of said spine assembly and is movably coupled to said proximal closure sleeve; and

    wherein said proximal closure sleeve has an opening in a distal end thereof and wherein a proximal end of said distal closure sleeve extends through said opening and is configured to prevent said proximal end of said distal closure sleeve from separating from said distal end of said proximal closure sleeve.

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