Surgical stapler having force-based motor control

  • US 10,363,036 B2
  • Filed: 09/23/2015
  • Issued: 07/30/2019
  • Est. Priority Date: 09/23/2015
  • Status: Active Grant
First Claim
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1. A surgical stapler, comprising:

  • a firing drive system comprising;

    a movable driving member;

    a gear mechanically coupled with the movable driving member; and

    a shaft connected to the gear;

    a handle assembly comprising a housing and a bushing block surrounded by the housing, wherein the bushing block is configured to support the shaft;

    an electric motor mechanically coupled to the firing drive system;

    a battery electrically couplable to the electric motor; and

    a control system electrically connected to the electric motor, wherein the control system comprises;

    an H-bridge circuit; and

    a sensor positioned on the bushing block, wherein the control system is configured to control the electric motor based on a force applied to the bushing block by the firing drive system.

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