Choked pressure type pilot operated valve with remote pilot valve actuation

Claim 1

PRESSURE CONTROL AND REGULATING VALVE MECHANISM CONNECTABLE IN A FLUID SUPPLY LINE TO DELIVER FLUID AT DESIRED VARIABLE VOLUMES AND PRESSURES AND COMPRISING IN COMBINATION, A VALVE BODY HAVING INLET AND DISCHARGE MEANS, A FLEXIBLE DIAPHRAGM THEREIN DIVIDING THE INTERIOR OF SAID BODY INTO TWO CHAMBERS, A VALVE SEAT OPENING INTO ONE OF SAID CHAMBERS CONNECTING SAID FLUID INLET WITH SAID ONE CHAMBER, SAID ONE CHAMBER FORMING A FLOW PATH BETWEEN SAID VALVE SEAT AND SAID DISCHARGE MEANS, EACH PORTION OF SAID ONE CHAMBER HAVING A GREATER CROSS-SECTIONAL AREA THAN THE CROSS-SECTIONAL AREA OF THE OPENING BETWEEN SAID DISCHARGE MEANS AND SAID ONE CHAMBER, A VALVE MEMBER OPERABLE RELATIVE TO SAID VALVE SEAT BETWEEN CLOSED AND OPEN POSITIONS, BIASING MEANS NORMALLY URGING SAID VALVE MEMBER INTO CLOSED ENGAGEMENT WITH SAID VALVE SEAT, MEANS MOVABLE WITH SAID DIAPHRAGM AND INTERENGAGING SAID VALVE MEMBER TO MOVE IT VARIABLE AMOUNTS RELATIVE TO SAID VALVE SEAT CORRESPONDINGLY TO VARY THE FLOW OF FLUID THERETHROUGH FROM SAID INLET TO SAID DISCHARGE MEANS, FLUID BLEED MEANS INCLUDING CONDUIT MEANS CONNECTABLE WITH SAID FLUID SUPPLY LINE AND EXTENDING TO SAID OTHER CHAMBER OF SAID VALVE BODY TO DELIVER LINE FLUID THERETO FOR MOVING SAID DIAPHRAGM, FLUID OUTLET MEANS LEADING FROM SAID OTHER CHAMBER TO AN ATMOSPHERE, AND DISCHARGE VENTING MEANS IN SAID FLUID OUTLET MEANS OPERABLE TO INTERRUPT THE DISCHARGE OF FLUID FROM SAID OTHER CHAMBER AND THEREBY MOVE SAID DIAPHRAGM AND SAID VALVE MEMBER BY THE PRESSURE OF LINE FLUID, WHEREBY A PREDETERMINED VOLUME OF FLUID FLOWING THROUGH SAID VALVE SEAT TO SAID FLUID DISCHARGE MEANS IS INITIATED.