Fluid control valve

Claim 1

A FOUR-WAY VALVE UNIT, COMPRISING, (A) A VALVE HOUSING HAVING A PLURALITY OF PORTS INCLUDING AN INTAKE PORT FOR CONNECTION TO AN INCOMING PRESSURIZED LINE, AN EXHAUST PORT AND A PAIR OF LOAD PORTS DISPOSED BETWEEN THE INTAKE PORT AND THE EXHAUST PORT, A PAIR OF SHIFTABLE DOUBLE POPPET VALVES IN THE HOUSING AND EACH HAVING SPACED VALVE MEMBERS TO OPPOSITE SIDES OF ONE OF THE LOAD PORTS TO OPEN AND CLOSE A CONNECTION OF ONE OF SAID LOAD PORTS TO SAID INTAKE AND EXHAUST PORTS, SAID POPPET VALVES HAVING INLET CHAMBERS CONNECTED TO THE INTAKE PORT AND HAVING VALUE POSITIONING MEMBERS THEREIN SUBJECTED TO THE INCOMING PRESSURE AT SAID INTAKE PORT AND BERING BIASED TO A FIRST POSTION BY THE INCOMING PRESSURE TO OPEN ONE LOAD PORT CONNECTION AND TO CLOSE THE OTHER LOAD CONNECTION, AND (B) MEANS INCLUDING A PILOT VALVE FOR CONNECTION TO A FLUID PRESSURE SOURCE AND TO THE POSITIONING MEANS AND ESTABLISHING AN OPPOSING HYDRAULIC FORCE ON THE VALVE POSITIONING MEMBERS FOR SELECTIVELY AND SIMULTANEOUSLY SHIFTING SAID POPPET VALVES AGAINST SAID INCOMING PRESSURE TO REVERSE THER CONNECTION OF THE LOAD PORTS.