Surgical stapler having temperature-based motor control

  • US 10,085,751 B2
  • Filed: 09/23/2015
  • Issued: 10/02/2018
  • Est. Priority Date: 09/23/2015
  • Status: Active Grant
First Claim
Patent Images

1. A surgical stapler, comprising:

  • a drive system;

    an electric motor mechanically coupled to the 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 comprising a high side and a low side, wherein the low side of the H-bridge circuit comprises;

    first and second switching devices; and

    a resistive heating element electrically connected in series with the first switching device; and

    a temperature sensing device positioned proximate the resistive heating element, wherein the control system is configured to control a force applied to the drive system based on a temperature associated with the resistive heating element and sensed by the temperature sensing device.

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