Hydraulic device

Claim 1

A CONTROL VALVE COMPRISING (A) A HOUSING CONTAINING INLET, EXHAUST, AND FIRST AND SECOND MOTOR PORTS; (B) A PAIR OF VALVE ELEMENTS IN THE HOUSING, EACH BEING MOVABLE IN REVERSE DIRECTIONS FROM A RELATIVE IDING POSITION, RELATIVE MOVEMENT OF THE ELEMENTS IN ONE DIRECTION WITH RESPECT TO THE IDLING POSITION CAUSING MEANS CARRIED BY THE ELEMENTS AND THE HOUSING TO ISOLATE THE INLET PORT FROM THE EXHAUST PORT, TO CONNECT THE FIRST MOTOR PORT WITH THE INLET PORT AND TO CONNECT THE SECOND MOTOR PORT WITH THE EXHAUST PORT, AND RELATIVE MOVEMENT OF THE ELEMENTS IN THE OPPOSITE DIRECTION WITH RESPECT TO THE IDLING POSITION CAUSING MEANS CARRIED BY THE ELEMENTS AND THE HOUSING TO ISOLATE THE INLET PORT FROM THE EXHAUST PORT, TO CONNECT THE FIRST MOTOR PORT WITH THE EXHAUST PORT AND TO CONNECT THE SECOND MOTOR PORT WITH THE INLET PORT; (C) ACTUATING MEANS FOR SHIFTING ONE OF THE VALVE ELEMENTS; (D) CENTERING MEANS BIASING THE OTHER VALVE ELEMENT TOWARD A NEUTRAL POSITION WITH RESPECT TO THE HOUSING; (E) FIRST MOTOR MEANS INCLUDING A WORKING CHAMBER AND MOVABLE REACTION SURFACES CARRIED BY BOTH VALVE ELEMENTS, THE REACTION SURFACES BEING ARRANGED TO MOVE THE ELEMENTS IN SAID ONE DIRECTION WITH RESPECT TO THE IDLING POSITION; (F) SECOND MOTOR MEANS INCLUDING A WORKING CHAMBER AND MOVABLE REACTION SURFACES CARRIED BY BOTH VALVE ELEMENTS, THE REACTION SURFACES BEING ARRANGED TO MOVE THE ELEMENTS IN SAID OPPOSITE DIRECTION WITH RESPECT TO THE IDLING POSITION; AND (G) MEANS FOR CONNECTING THE WORKING CHAMBERS OF THE SECOND AND FIRST MOTOR MEANS WITH THE INLET AND EXHAUST PORTS, RESPECTIVELY, WHEN ONE OF THE VALVE ELEMENTS MOVE FROM SAID IDLING POSITION IN SAID ONE DIRECTION, AND FOR CONNECTING THE WORKING CHAMBERS OF THE FIRST AND SECOND MOTOR MEANS WITH THE INLET AND EXHAUST PORTS, RESPECTIVELY, WHEN ONE OF THE VALVE ELEMENTS MOVES FROM SAID IDLING POSITION IN SAID OPPOSITE DIRECTION.