Pilot controlled valve

Claim 1

IN A PILOT CONTROLLED VALVE HAVING A VALVE BODY HAVING A VALVE SEAT, AN INLET LEADING TO SAID VALVE SEAT, AND AN OUTLET LEADING FROM SAID VALVE SEAT, A DIAPHRAGM SUPPORTED BY SAID VALVE BODY AND ARRANGED TO ENGAGE SAID VALVE SEAT TO SHUT OFF FLOW BETWEEN SAID INLET AND OUTLET, A CHAMBER FORMED IN SAID VALVE BODY OVER SAID DIAPHRAGM, A BLEED APERTURE IN SAID DIAPHRAGM FOR INTRODUCING FLUID INTO SAID CHAMBER FROM SAID INLET AT SUBSTANTIALLY THE INLET PRESSURE FOR CLOSING SAID DIAPHRAGM ONTO SAID VALVE SEAT, AND A CONTROL PASSAGEWAY IN SAID VALVE BODY LEADING FROM SAID CHAMBER TO SAID OUTLET FOR RELEASING FLUID FROM SAID CHAMBER TO ALLOW SAID DIAPHRAGM TO OPEN, SAID PASSAGEWAY INCLUDING A PILOT CONTROL PORT THEREIN, THE IMPROVEMENT COMPRISING IMPROVED MEANS FOR OPENING AND CLOSING SAID PORT THEREBY TO CONTROL THE OPERATION OF SAID DIAPHRAGM RELATIVE TO SAID VALVE SEAT, SAID MEANS INCLUDING A CONTROL CAVITY FORMED IN SAID VALVE BODY, A SOLENOID COIL DISPOSED ADJACENT TO BUT EXTERIOR OF SAID CAVITY, AN ELONGATED CLAPPER-LIKE ARMATURE OPERATED BY SAID COIL, SAID ARMATURE BEING DISPOSED IN SAID CONTROL CAVITY AND ARRANGED TO ENGAGE SAID RESILIENT WASHER TO CLOSE SAID PORT, AND A LEAF SPRING SUPPORTED AT ONE END BY SAID VALVE BODY AND SUPPORTING SAID ARMATURE AT ITS EITHER END, SAID ARMATURE ENGAGING SAID PORT ADJACENT ONE END THEREOF AND HAVING AN OFFSET SECTION SPACED FROM SAID PORT, SAID OFFSET SECTION BEING DISPOSED IMMEDIATELY ADJACENT THE ROOF OF SAID CAVITY AND SAID SPRING EXTENDING PAST SAID OFFSET PORTION TO ENGAGE SAID ARMATURE, SAID SPRING NORMALLY BIASING SAID ARMATURE INTO ENGAGEMENT WITH SAID PORT TO CLOSE SAID PORT, AND SAID COIL BEING ARRANGED TO SWING SAID ARMATURE OFF SAID PORT UPON THE ENERGIZATION THEREOF, THEREBY TO OPEN SAID PORT AND RELEASE THE FLUID PRESSURE OVER SAID DIAPHRAGM FOR OPENING SAID VALVE.