Motorized surgical cutting and fastening instrument

  • US 10,660,640 B2
  • Filed: 12/20/2013
  • Issued: 05/26/2020
  • Est. Priority Date: 02/14/2008
  • Status: Active Grant
First Claim
Patent Images

1. A surgical instrument, comprising:

  • an end effector, comprising;

    a cutting instrument; and

    ;

    a removable cartridge;

    a shaft connected to the end effector, the shaft comprising a drive train for powering the end effector to cause the cutting instrument to move to cut tissue in the end effector;

    a handle connected to the shaft;

    an electric DC motor connected to the drive train for powering the drive train; and

    a power pack that is insertable in and removable from the handle, wherein the power pack comprises;

    a plurality of rechargeable battery cells; and

    an electronic control circuit for controlling an output voltage provided by the power pack to the motor based on an input from the surgical instrument indicative of a status of the cartridge after the cartridge is received by the end effector and prior to energizing the motor, wherein;

    the electronic control circuit connects a first voltage to the motor when the cartridge has a first status;

    the electronic control circuit connects a second voltage to the motor when the cartridge has a second status, wherein the second voltage is less than the first voltage; and

    the electronic circuit comprises at least one switch;

    for connecting a first set of the plurality of rechargeable battery cells to the electric DC motor to connect the first voltage to the electric DC motor when the cartridge has the first status; and

    for connecting a second set of the plurality of rechargeable battery cells to the electric DC motor to connect the second voltage to the electric DC motor when the cartridge has the second status.

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