Fluid control valve

Claim 1

A FLUID CONTROL DEVICE COMPRISING, MEANS FORMING A HOUSING HAVING AN INLET PASSAGEWAY AND AN OUTLET PASSAGEWAY, PISTON MEANS COOPERATING WITH SAID HOUSING TO FORM A PRESSURE CHAMBER THEREIN, VALVE MEANS LOCATED IN SAID INLET PASSAGEWAY OF SAID HOUSING OPERABLE TO DIRECT A FLOW OF PRESSURIZED FLUID THROUGH SAID INLET PASSAGEWAY INTO SAID PRESSURE CHAMBER AND THENCE THROUGH SAID OUTLET PASSAGEWAY, VALVE ACTUATOR MEANS OPERATIVELY ASSOCIATED WITH SAID PISTON MEANS, MEANS INCLUDING A SPRING OPERATIVELY ASSOCIATED WITH SAID PISTON MEANS FOR SHIFTING SAID PISTON MEANS IN A FIRST PREDETERMINED DIRECTION TO CAUSE SAID VALVE ACTUATOR MEANS TO CONDITION SAID VALVE MEANS TO DIRECT PRESSURIZED FLUID THROUGH SAID INLET PASSAGEWAY, SAID PISTON MEANS AND VALVE ACTUATOR MEANS MOVABLE INTO AN EQUILIBRIUM POSITION TO CLOSE SAID FIRST VALVE MEANS UPON THE OCCURRENCE OF A PREDETERMINED PRESSURE IN SAID PRESSURE CHAMBER, SECOND VALVE MEANS OPERATIVELY ASSOCIATED WITH SAID PISTON MEANS FOR EXHAUSTING SAID PRESSURE CHAMBER WHEN SAID PISTON MEANS IS SHIFTED IN A DIRECTION OPPOSITE TO SAID FIRST PREDETERMINED DIRECTION, AND MEANS FOR DAMPING MOVEMENT OF SAID PISTON MEANS PRODUCED BY TRANSCIENT HIGH PRESSURE CONDITIONS IN SAID PRESSURE CHAMBER TO PREVENT EXHAUST OF FLUID FROM SAID CHAMBER DURING SUCH PERIODS OF OPERATION.