Leveling valve

Claim 1

A FLUID LEVELING SYSTEM FOR A VEHICLE COMPRISING IN COMBINATION A VEHICLE FRAME MEMBER, A VEHICLE AXLE MEMBER, AN EXPANSIBLE CHAMBER MEMBER CONNECTED BETWEEN SAID FRAME MEMBER AND SAID AXLE MEMBER FOR RESILIENTLY SUPPORTING THE AXLE MEMBER ON THE FRAME AND CONTROLLING THE LEVEL OF THE FRAME MEMBER WITH RESPECT TO A WHEEL SUPPORTED ON THE AXLE MEMBER, A FLUID PRESSURE PUMP ADAPTED TO DELIVER PRESSURIZED LEVELING FLUID TO THE SYSTEM, A RESERVOIR FOR SUPPLYING FLUID TO SAID PUMP, A CONTROL VALVE LOCATED BETWEEN THE PUMP AND THE EXPANSIBLE CHAMBER MEMBER AND HAVING A VALVE BODY WITH A CENTRAL VALVE CHAMBER THEREIN WITH A FIRST PORT LEADING INTO SAID CHAMBER AND CONNECTED TO RECEIVE PRESSURIZED FLUID FROM THE PUMP, A SECOND PORT LEADING INTO SAID CHAMBER AND CONNECTED TO SAID EXPANSIBLE CHAMBER, AND A THIRD PORT LEADING FORM SAID CHAMBER AND CONNECTED TO CONDUCT A BLEEDING LEVELING FLUID TO SAID RESERVIOR, A FIRST VALVE MEMBER ADJUSTABLE THREADED INTO SAID FIRST PORT AND HAVING A VALVE OPERATING STEM PROJECTING INTO SAID VALVE CHAMBER, A SECOND VALVE MEMBER ADJUSTABLY THREADED INTO SAID THIRD PORT AND HAVING A VALVE OPERATING STEM EXTENDING INTO SAID CHAMBER, A VALVE-OPERATING ARM EXTENDING INTO THE VALVE CHAMBER AND LOCATED BETWEEN SAID VALVE OPERATING STEMS WHEREBY MOVEMENT IN A FIRST DIRECTION WILL ENGAGE THE STEM OF THE FIRST VALVE MEMBER AND MOVEMENT IN A SECOND DIRECTION WILL ENGAGE THE STEM OF THE SECOND VALVE MEMBER, A CONTROL ARM CONNECTED BETWEEN THE FRAME AXLE MEMBER, A CLUTCH MEANS LOCATED BETWEEN THE CONTROL ARM AND THE VALVE-OPERATING ARM TO CONNECT SAID ARM AND CAUSE OPERATION OF THE VALVE MEMBERS WITH RELATIVE MOVEMENT OF THE AXLE MEMBER BEYOND PREDETERMINED LIMITS, A PRESSURE-RESPONSIVE CLUTCH OPERATING MEMBER CONNECTED TO THE FIRST PORT AND OPERATIVE TO CONNECT THE CLUTCH ONLYU WHEN THE FIRST PORT IS PRESSURIZED BY THE PUMP, MEANS TO AUTOMATICALLY DISCONNECT THE CLUTCH WITH FAILURE OF PRESSURE, AND MEANS TO AUTOMATICALLY REORIENT THE CLUTCH WITH THE BUILD-UP OF PRESSURE AT SAID FIRST PORT WHEREBY THE ARMS WILL FUNCTION TO OPEN THE VALVE MEMBERS AT THE PROPER RELATIVE POSITIONS OF THE AXLE AND FRAME WITH REPRESSURIZATION OF THE FIRST PORT BY THE PUMP.