Drive arrangements for articulatable surgical instruments

  • US 9,844,375 B2
  • Filed: 12/18/2014
  • Issued: 12/19/2017
  • Est. Priority Date: 12/18/2014
  • Status: Active Grant
First Claim
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1. A shaft assembly for a surgical instrument comprising a movable drive member, said shaft assembly comprising:

  • a spine assembly operably couplable to the surgical instrument;

    a surgical end effector coupled to said spine assembly by an articulation joint;

    a proximal firing member interfacing with the movable drive member and supported for movable travel relative to said spine assembly;

    an intermediate firing member supported for movable travel relative to said spine assembly;

    a distal firing member interfacing with said intermediate firing member and supported for selective axial travel through at least a portion of said surgical end effector;

    an articulation driver interfacing with said end effector to apply articulation motions thereto; and

    a clutch system selectively movable between an articulation orientation and a firing orientation such that when said clutch system is in said articulation orientation, movement of said movable drive member is transmitted to said articulation driver through said proximal firing member and when said clutch system is in said firing orientation, movement of said movable drive member is transmitted to said distal firing member through said proximal firing member and said intermediate firing member.

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