Fluid pressure feed or reducing valve

Claim 1

AN ELECTROMAGNETIC PRESSURE REDUCING VALVE FOR DELIVERING FLUID PRESSURE FROM A SOURCE TO A RECEIVER AT A PRESSURE LESS THAN THAT OF THE SOURCE COMPRISING A BODY HAVING AN INLET PORT AND INLET CAVITY CONNECTED TO SAID SOURCE AND HAVING A DELIVERY PORT AND DELIVERY CAVITY CONNECTED TO THE RECEIVER, A VALVE PORT BETWEEN SAID INLET AND DELIVERY CAVITIES, A VALVE RESILIENTLY URGED TO A POSITION CLOSING SAID PORT, A PRESSURE RESPONSIVE ELEMENT HAVING ONE SIDE EXPOSED TO THE PRESSURE IN SAID DELIVERY CAVITY, RESILIENT MEANS ACTING ON SAID ELEMENT IN OPPOSITION TO THE PRESSURE IN SAID DELIVERY CAVITY, A STEM CONNECTED TO SAID ELEMENT FOR MOVEMENT THEREWITH AND HAVING A PASSAGE THEREIN, A PLUNGER SLIDEABLE IN THE PASSAGE IN SAID STEM AND HAVING AN EXHAUST PASSAGE THERETHROUGH, SAID PLUNGER BEING MOVABLE WITH RESPECT TO SAID ELEMENT AND SAID STEM AGAINST SAID VALVE TO CLOSE OFF SAID EXHAUST PASSAGE WITH CONTINUED MOVEMENT OF SAID PLUNGER OPENING SAID VALVE, A SECOND RESILIENT MEANS WITHIN SAID DELIVERY CAVITY FOR URGING SAID PLUNGER OUT OF ENGAGEMENT WITH SAID VALVE, ELECTROMAGNETIC MEANS INCLUDING A WINDING INTERPOSED BETWEEN SAID FIRST NAMED RESILIENT MEANS AND THE UPPER PORTION OF SAID BODY AND INCLUDING ALSO A MOVABLE ARMATURE ABUTTING THE UPPER END OF SAID PLUNGER FOR MOVING SAID PLUNGER INDEPENDENTLY OF THE FIRST NAMED RESILIENT MEANS AND AGAINST SAID VALVE TO CLOSE SAID EXHAUST PASSAGE AND OPEN SAID VALVE UPON ENGERGIZATION OF SAID ELECTROMAGNETIC MEANS, STOP MEANS INTEGRAL WITH SAID ELEMENT TO LIMIT MOVEMENT OF SAID PLUNGER WITH RESPECT TO SAID ELEMENT AFTER OPENING OF SAID VALVE, SAID ELEMENT CAUSING SAID STOP MEANS TO ACT ON SAID PLUNGER TO MOVE IT IN A DIRECTION AWAY FROM SAID VALVE UPON MOVEMENT OF SAID ELEMENT BY THE FORCE OF PRESSURE IN SAID DELIVERY CAVITY SLIGHTLY IN EXCESS OF THE OPPOSING FORCES OF SAID FIRST NAMED RESILIENT MEANS AND SAID ELECTROMAGNETIC MEANS AND MEANS FOR ADJUSTING THE POSITION OF SAID WINDING TOWARDS OR AWAY FROM SAID ELEMENT TO VARY THE COMPRESSION OF SAID FIRST NAMED RESILIENT MEANS.