A patient support system comprises a patient support apparatus for patients. The patient support apparatus comprises a base and a patient support surface supported by the base. The patient support apparatus also comprises movable members that are movable between at least a first position and a second position. One or more rotary actuators are coupled to each movable member. The rotary actuator permits drive torque to move the movable member in a desired position between the first and second positions and restricts back drive torque from moving the movable member.
