Powered surgical instruments with firing system lockout arrangements

  • US 9,861,359 B2
  • Filed: 03/12/2013
  • Issued: 01/09/2018
  • Est. Priority Date: 01/31/2006
  • Status: Active Grant
First Claim
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1. A surgical instrument comprising:

  • a handle;

    an end effector, the end effector comprising a pair of jaws having an open position and a closed position, wherein at least one of the jaws comprises a channel for receiving a cartridge containing a plurality of surgical fasteners;

    an electrically powered actuator for deploying the surgical fasteners, the actuator comprising a power source and a motor;

    an activation mechanism attached to the handle to move the pair of jaws from the open to the closed position and to activate the actuator, wherein the activation mechanism comprises;

    a first trigger attached to the handle and communicating with the end effector such that when the first trigger is in a fully actuated position, the end effector is moved from the open to the closed position;

    a second trigger attached to the handle for activating the actuator;

    a latch operably mounted to one of the handle and the first trigger for releasably retaining the first trigger in the fully actuated position; and

    a lockout mechanism configured to permit current to flow from the power source to the motor when the pair of jaws is in the closed position and to prevent current from flowing from the power source to the motor when the pair of jaws is in the open position, wherein the lockout mechanism comprises a closure lock switch associated with the latch, the closure lock switch connected to the power source and the motor such that when the latch retains the first trigger in the fully actuated position, the closure lock switch permits current to flow from the power source to the motor and when the first trigger is not latched in the fully actuated position, the closure lock switch prevents current from flowing from the power source to the motor.

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