Modular powered surgical instrument with detachable shaft assemblies

  • US 9,743,929 B2
  • Filed: 03/26/2014
  • Issued: 08/29/2017
  • Est. Priority Date: 03/26/2014
  • Status: Active Grant
First Claim
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1. A surgical instrument, comprising:

  • a housing;

    an interchangeable shaft assembly removably couplable to the housing, the interchangeable shaft assembly including an end effector comprising;

    a first end effector portion operably responsive to first drive motions applied thereto; and

    a second end effector portion operably responsive to second drive motions applied thereto and wherein the surgical instrument further comprises;

    a first drive system operably supported by the housing, the first drive system movable from a first unactuated position to a second actuated position, the first drive system being configured to apply the first drive motions to the interchangeable shaft assembly operably coupled to the housing when the first drive system is in the second actuated position;

    a second drive system operably supported by the housing, the second drive system movable from an unfired position to a fired position, the second drive system being configured to apply the second drive motions to the interchangeable shaft assembly when the second drive system is in the fired position;

    a latch system for removably coupling the interchangeable shaft assembly to the housing such that when the first drive system is in the first unactuated position, the interchangeable shaft assembly is detachable from the housing and when the first drive system is in the second actuated position, the latch system prevents the interchangeable shaft assembly from being detached from the housing;

    wherein the interchangeable shaft assembly further comprises a chassis member configured for removable engagement with the housing wherein the latch system comprises a lock member selectively movable between a locked position and an unlocked position such that when in the locked position, the lock member retainingly couples the chassis member to the housing and when the lock member is in the unlocked position, the chassis member may be detached from the housing, wherein the housing defines a longitudinal shaft axis and wherein the chassis member is engageable with the housing along an installation axis that is perpendicular to the longitudinal shaft axis, and wherein the interchangeable shaft assembly further comprises;

    a first shaft assembly configured to operably transmit the first drive motions to the first end effector portion; and

    a first shaft yoke operably supporting the first shaft assembly and configured for releasable engagement to a corresponding portion of the first drive system, said first shaft yoke configured to prevent the lock member from being movable to the unlocked position when the first drive system is in the second actuated position.

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