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PULLEY ARRANGEMENT FOR ARTICULATING A SURGICAL INSTRUMENT

  • US 20170172553A1
  • Filed: 12/09/2016
  • Published: 06/22/2017
  • Est. Priority Date: 12/10/2015
  • Status: Active Grant
First Claim
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1. A robotic surgical instrument comprising:

  • a shaft;

    an end effector element;

    an articulation connecting the end effector element to the shaft, the articulation comprising;

    a first joint driveable by a first pair of driving elements, the first joint permitting the end effector element to rotate about a first axis transverse to a longitudinal axis of the shaft, the rotation of the end effector element about the first axis bounded by an extreme rotation angle relative to the longitudinal axis, anda second joint driveable by a second pair of driving elements; and

    a pulley arrangement around which the second pair of driving elements is constrained to move, the pulley arrangement comprising;

    a first set of pulleys rotatable about the first axis, anda second set of pulleys located relative to the first set of pulleys such that at the extreme rotation angle the second pair of driving elements is retained in contact with both the first and second sets of pulleys.

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