Motorized surgical instrument

  • US 9,005,230 B2
  • Filed: 01/18/2013
  • Issued: 04/14/2015
  • Est. Priority Date: 09/23/2008
  • Status: Active Grant
First Claim
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1. A surgical instrument comprising:

  • an end effector comprising a moveable firing member;

    an electric motor for actuating the firing member; and

    a motor control circuit for controlling the motor, wherein the motor control circuit comprises;

    a power source connected to the motor for electrically powering the motor;

    a charge accumulator device; and

    a switching circuit connected to the power source and the charge accumulator device, wherein the switching circuit comprises a network of switches defining a charge state and a discharge state, wherein in the charge state the power source is connected to the charge accumulator device not in series to electrically charge the charge accumulator device, wherein in the charge state, the power source is connected to the motor and provides electric current to the motor, and wherein in the discharge state the charge accumulator is connected in series with the power source to provide additional power to the motor, wherein the network of switches does not assume the charge state and the discharge state simultaneously.

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