Ratio pressure reducing valve

Claim 1

A RATION PRESSURE REDUCING VALVE COMPRESING A HOLLOW CYLINDRICAL VALVE BODY HAVING OPPOSITE ENDS, SAID BODY HAVING AN INLET MEANS AND AN OUTLET MEANS AT SAID OPPOSITE ENDS, SAID INLET MEANS AND OUTLET MEANS BEING COAXIAL, SAID BODY HAVING AN INNER ANNULAR SURFACE INTERMEDIATE SAID ENDS OF REDUCED DIAMETER AND A LARGER DIAMETER INNER ANNULAR SURFACE AT THE OUTLET END, AN ANNULAR VALVE SEAT AT THHE INLET END ENCIRCLING THE INLET MEANS IN PROXIMATE RELATION, A VALVE MEMBER SLIDABLY ARRANGED IN SAID HOLLOW BODY, SAID VALVE MEMBER INCLUDING A LARGER DIAMETER PISTON SLIDABLY AND SEALABLY ENGAGED WITH THE INNER ANNULAR SURFACE AT THE OUTLET END, AND A SMALLER DIAMETER PISTON SLIDABLY AND SEALABLY ENGAGED WITH THE INNER ANNULAR SURFACE WHICH IS INTERMEDIATE SAID ENDS, SAID VALVE MEMBER DEFINING WITH SAID VALVE BODY A LOW PRESSUR SPACE ADJACENT THE END OF THE LARGE RDIAMETER PISTON AND A PRESSURE RELEASE SPACE ADJACENT THE VALVE SEAT, SAID VALVE MEMBER HAVING AN AXIAL PASSAGE WHICH OPES AT ONE END INTO THE LOW PRESSURE SPACE AND A TRANSVERSE OPENING IN SAID SMALLER DIAMETER PISTON IN COMMUNICATION WITH SAID AXIAL PASSAGE AND OPENING INTO THE PRESSURE RELEASE SPACE, SAID CMALLER DIAMETER PRISTON HAVING A CLOSED END FACING SAID INLET MEANS IN COXIAL RELATION AND AN AXIALLY DEPENDING ANNULAR RIM ON THE CLOSED END OF THE PISTON EXTENDING TOWARDS THE ANNULAR VALVE SEAT TO SELECTIVELY CONTACT THE SAME AND CLOSE COMMUNICATION BETWEEN THE INLET MEANS AND THE PRESSURE RELEASE SPACE, WHEREBY UPON AXIAL MOVEMENT OF THE VALVE MEMBER THE VALVE WILL BE SELECTIVELY OPENED AND CLOSED, SAID INLET MEANS HAVE AN AN APERTURE WITH A DIAMETER ONLY SLIGHTLY LESS THAN THE DIAMETER OF THE SMALL DIAMETER PISTON AND ADAPTED FOR SUPPLYING FLUID AT A SUBSTANTIALLY CONSTNAT PRESSURE FOR OPEN AND CLOSED POSITIONS OF THE VALVE, SAID RIM BEING RELATIVELY NARROW AND BEIN PREIPHERALLY ON THE CLOSED END OF THE PISTON TO THEREBY HAVE A DIAMETER ONLY SLIGHTLY GREATER THAN THE DIAMETER OF THE APERTURE OF THE INLET MEANS SUCH THAT THE EFFECTIVE THRUST ON THE END OF THE SMALLER DIAMETER PISTON DUE TO PRESSURE FLUID ACTING THEREON IS ONLY SLIGHTLY INCREASED WHEN THE RIM MOVES OUT OF CONTACT WITH THE VALVE SEAT AND THE VALVE IS OPEN.