Pressure regulating valve

Claim 1

A PRESSURE REGULATING VALVE COMPRISING, IN COMBINATION, A HOUSING HAVING INLET AND OUTLET CHAMBERS, A POPPET VALVE COMPRISING A POPPET AND POPPET SEAT, A PASSAGE BETWEEN SAID INLET AND OUTLET CHAMBERS A TRANSDUCER FORMING A PORTION OF SAID OUTLET CHAMBER WALL, A REFERENCE SPRING EXERTING FORCE ON SAID TRANSDUCER OPPOSITE TO THE FORCE OF THE OUTLET PRESSURE IN SAID CHAMBER, A POPPET STEM EXTENDING FROM SAID TRANSDUCER THROUGH SAID PASSAGE INTO SAID INLET CHAMBER, MEANS MOUNTING SAID POPPET ON SAID STEM, MEANS SUPPORTING SAID SEAT ON SAID HOUSING AT THE INLET CHAMBER END OF SAID PASSAGE IN POSITION TO COOPERATE WITH SAID POPPET, SAID POPPET BEING ACTED UPON BY A FORCE PROPORTIONAL TO THE PRESSURE IN SAID INLET CHAMBER TO VARY ITS POSITION RELATIVE TO SAID SEAT, AND SAID SUPPORT MEANS INCLUDES A BELLOWS INTERCONNECTING SAID SEAT AND SAID HOUSING, SAID BELLOWS BEING ACTED UPON BY THE INLET AND OUTLET PRESSURES TO CAUSE SAID BELLOWS TO CONTRACT AND EXPAND WITH INSTANTANEOUS DIFFERENCES BETWEEN INLET AND OUTLET PRESSURES TO THEREBY ALTER THE POSITION OF SAID POPPET RELATIVE TO SAID SEAT AND ADJUST THE FLOW THROUGH SAID PASSAGE TO MAINTAIN THE OUTLET PRESSURE AT A VALUE DETERMINED BY SAID REFERENCE SPRING.