Motorized surgical cutting and fastening instrument having a magnetic drive train torque limiting device

摘要

A surgical cutting and fastening instrument. The instrument comprises an end effector and a shaft connected to the end effector. The shaft comprises a drive train for powering the end effector. The instrument also comprises an electric, DC motor connected to the drive train for powering the drive train. The instrument also comprises a torque-limiting device (400) connected between to an output pole (408) of the motor and an input pole of the drive train (410).