Fluid-operable actuating system in a motor vehicle

Claim 1

IN A MOTOR VEHICLE, AN ACTUATING SYSTEM COMPRISING A PLURALITY OF FLUID-OPERABLE ACTUATORS, A FLUID CIRCUIT INCLUDING A PRESSURE PIPE AND A RETURN PIPE, SAID PIPES BEING ALTERNATIVELY CONNECTABLE WITH EACH OF SAID ACTUATORS FOR THE OPTIONAL ACTUATING MOVEMENT OR RETURN MOVEMENT THEREOF, LOCKING MEANS IN SAID CIRCUIT MOVABLE BETWEEN AN UNLOCKING POSITION IN WHICH SAID CIRCUIT IS OPERATIVE TO AFFORD SAID RETURN MOVEMENT AND A LOCKING POSITION IN WHICH SAID CIRCUIT IS CLOSED TO PREVENT SAID RETURN MOVEMENT, ELECTROMAGNETIC MEANS COORDINATED TO SAID LOCKING MEANS FOR MOVEMENT THEREOF, A SOURCE OF ELECTRIC CURRENT, MEANS TO MAINTAIN A HYDRAULIC PRESSURE WITHIN SAID FLUID CIRCUIT WHEN SAID LOCKING MEANS IS IN SAID LOCKING POSITION, MANUALLY OPERABLE CONTROL SWITCH MEANS FOR OPTIONALLY CONNECTING SAID SOURCE OF CURRENT TO SAID ELECTROMAGNETIC MEANS, AND A MANUALLY OPERABLE MEMBER MOUNTED ON THE VEHICLE FOR OPERATION FROM THE OUTSIDE THEREOF AND COORDINATED TO SAID LOCKING MEANS FOR THE MECHANICAL OPERATION THEREOF, SAID MANUALLY OPERABLE MEMBER EFFECTING OPERATION OF SAID LOCKING MEANS INDEPENDENT OF SAID SOURCE OF ELECTRIC CURRENT AND SAID ELECTROMAGNETIC MEANS.