Servo actuable leveler for controlling pneumatic suspension systems for vehicles

Claim 1

A SERVO-ACTUABLE LEVELER, FOR CONTROLLING A PRESSURIZED FLUID SUSPENSION SYSTEM FOR VEHICLES COMPRISING, IN COMBINATION, FIRST AND SECOND CYLINDER AND PISTON ASSEMBLIES; A FIRST RELATIVELY ELONGATED ROD MEANS CONNECTED TO THE PISTON OF SAID FIRST ASSEMBLY AND EXTENDING OUTWARDLY THEREFROM; A SECOND RELATIVELY ELONGATED ROD MEANS CONNECTED TO THE PISTON OF SAID SECOND ASSEMBLY AND EXTENDING OUTWARDLY THEREFROM; MEANS FORMING AN INLET FOR CONNECTION TO A SOURCE OF PRESSURIZED FLUID; MEANS FORMING AN OUTLET FOR CONNECTION TO THE SUSPENSION SYSTEM; MEANS FORMING AN EXHAUST PORT; A FIRST NORMALLY CLOSED VALVE MEANS CONTROLLING CONNECTION OF SAID INLET TO SAID OUTLET; A SECOND NORMALLY CLOSED VALVE MEANS CONTROLLING CONNECTION OF SAID OUTLET TO SAID EXHAUST PORT; MEANS CONNECTING SAID INLET TO THE CYLINDERS OF SAID ASSEMBLIES FOR SUPPLY OF PRESSURIZED FLUID THERETO TO MOVE THE CYLINDERS THEREOF OUTWARDLY; RESPECTIVE SPRING MEANS ENGAGED WITH SAID ROD MEANS AND BIASING SAID ROD MEANS TO MOVE THEIR RESPECTIVE PISTONS INWARDLY OF THE ASSOCIATED CYLINDERS TO A LIMITING RETRACTED POSITION; SAID FIRST ROD MEANS; UPON A PREDETERMINED OUTWARD MOVEMENT THEREOF, ENGAGING SAID FIRST VALVE MEANS TO OPEN THE SAME, AND SAID SECOND ROD MEANS, UPON A PREDETERMINED OUTWARD MOVEMENT THEREOF, ENGAGING SAID SECOND VALVE MEANS TO OPEN THE SAME; ROTATABLE CAM MEANS POSITIONED IN THE PATH OF OUTWARD MOVEMENT OF BOTH OF SAID ROD MEANS; SAID CAM MEANS HAVING A NEUTRAL POSITION AND FIRST AND SECOND OPERATED POSITIONS SPACED ANGULARLY IN OPPOSED DIRECTIONS FROM SAID NEUTRAL