An actuator for use in effecting movement of a movable member with respect to a first member of a patient support apparatus. A motor is provided for generating rotational torque. A carrier is adapted to be secured to the first member. An input member is coupled to the motor for concurrent rotation. An output member is adapted to be coupled to the movable member. A reduction geartrain is supported between the input member and the output member. A clutch assembly is disposed in torque-translating relationship between the reduction geartrain and the output member and moves between: an engaged configuration wherein torque from the motor is translated across the reduction geartrain to move the movable member with respect to the first member, and a disengaged configuration wherein torque is at least partially interrupted across the reduction geartrain to allow movement of the movable member independent of rotation of the motor.
