Patent ID: 7913955

Claim:
A control surface drive system for moving an aircraft control surface, the system being coupleable to a source of hydraulic fluid, comprising: first and second supply lines and a return line coupleable to the source of hydraulic fluid; an actuator assembly coupled to the first and second supply lines and to the return line, the actuator assembly having: a hydraulic actuator connectable to the aircraft control surface and being movable between first and second positions, the hydraulic actuator configured to receive hydraulic fluid from the first supply line when the hydraulic actuator moves toward the first position, and configured to receive hydraulic fluid from the second supply line when the hydraulic actuator moves toward the second position; a flow blocking member coupled to the first and second supply lines and being movable between an open position and a closed position, with the flow blocking member in the closed position preventing movement of the hydraulic fluid to and from the hydraulic actuator; and a bypass line in fluid communication with the first and second supply lines and positioned to direct hydraulic fluid from one of the first and second supply lines into the other one of the first and second supply lines at a position intermediate the source and the hydraulic actuator when the hydraulic actuator moves toward the first position to recycle the hydraulic fluid back into the other one of the first and second supply lines.