Servomotor control system

Claim 1

IN A SERVOMOTOR CONTROL SYSTEM: A FLUID PRESSURE MOTOR HOUSING ADAPTED TO BE FIXED TO A STATIONARY SUPPORT, OPPOSING MOVABLE WALLS IN SAID HOUSING DEFINING A VARIABLE PRESSURE CHAMBER THEREBETWEEN, A CONTROL VALVE HOUSING ADAPTED TO BE SPACED APART FROM SAID FLUID PRESSURE MOTOR HOUSING, SAID VALVE HOUSING HAVING A CONTROL PORT FOR COMMUNICATION WITH SAID VARIABLE PRESSURE CHAMBER, MEANS FOR ATTACHING SAID VALVE HOUSING TO A STATIONARY SUPPORT, SAID VALVE HOUSING HAVING A NORMAL POSITION IN SAID MEANS FROM WHICH IT IS MOVABLE IN A FORWARD DIRECTION, SAID VALVE HOUSING HAVING VALVE MEANS THEREIN INCLUDING A CONTROL MEMBER HAVING A NORMAL POSITION THEREIN FROM WHICH IT IS MOVED FORWARDLY TO INCREASE THE PRESSURE IN SAID CONTROL PORT, SAID VALVE HOUSING HAVING A FORWARDLY EXTENDING REACTION CHAMBER WITH A REAR END WALL, SAID REAR END WALL HAVING AN OPENING COMMUNICATING WITH SAID CONTROL MEMBER, A BLOCK OF PRESSURIZABLE ELASTOMERIC MATERIAL POSITIONED IN SAID REACTION CHAMBER AGAINST SAID END WALL, A REACTION MEMBER POSITIONED AGAINST THE FRONT SURFACE OF SAID BLOCK OF PRESSURIZABLE MATERIAL, A REACTIONARY LEVERAGE SYSTEM TRANSFERRING FORCE FROM ONE OF SAID MOVABLE WALLS IN A REARWARD DIRECTION UPON SAID REACTION MEMBER TO OPPOSE ACTUATING MOVEMENT OF SAID CONTROL MEMBER, AND ABUTMENT MEANS FOR LIMITING REARWARD MOVEMENT OF SAID VALVE HOUSING.