Gas pressure regulator

Claim 1

IN A GAS PRESSURE REGULATOR, WALL MEANS FORMING A LOW PRESSURE CHAMBER HAVING OUTLET MEANS AND A HIGH PRESSURE CHAMBER HAVING INLET MEANS AND A CYLINDRICAL CHANNEL FORMED IN A WALL PORTION THEREOF, SAID CHANNEL HAVING AN APERTURE FORMED IN AN END PORTION THEREOF IN COMMUNICATION WITH THE ATMOSPHERE, MEANS FORMING A TAPERED ORIFICE CONNECTING SAID HIGH PRESSURE CHAMBER TO SAID LOW PRESSURE CHAMBER, A DIAPHRAGM IN SAID LOW PRESSURE CHAMBER, A FIRST SPRING ACTING ON SAID DIAPHRAGM AGAINST THE GAS PRESSURE IN SAID LOW PRESSURE CHAMBER, A DOUBLE VALVE IN SAID HIGH PRESSURE CHAMBER CONNECTED TO THE DIAPHRAGM BY A STEM FOR CONTROLLING THE MOVEMENT OF GAS THROUGH SAID ORIFICE AND FOR CLOSING SAID APERTURE TO ATMOSPHERE, SAID VALVE HAVING A TAPERED HEAD PORTION ADAPTED TO SEAT IN SAID ORIFICE, AND A CYLINDRICAL PORTION HAVING A BASE OPPOSITE SAID HEAD PORTION, SAID CYLINDRICAL PORTION BEING ADAPTED FOR SLIDABLE MOUNTING IN SAID CHANNEL WITH SAID BASE BEING EXPOSED TO RELATIVELY CONSTANT ATMOSPHERIC PRESSURE THROUGH THE CHANNEL APERTURE TENDING TO CLOSE THE VALVE, A SECOND SPRING MOUNTED IN SAID HIGH PRESSURE CHAMBER BETWEEN SAID WALL MEANS AND SAID VALVE URGING SAID VALVE IN A DIRECTION TO CLOSE SAID ORIFICE, A FIRST O TYPE SEALING RING MOUNTED ON SAID HEAD PORTION TO SEAL BETWEEN SAID HIGH PRESSURE CHAMBER AND SAID LOW PRESSURE CHAMBER, AND A SECOND O TYPE SEALING RING MOUNTED ON SAID VALVE ABOUT ITS CYLINDRICAL PORTION TO SEAL BETWEEN SAID HIGH PRESSURE CHAMBER AND ATMOSPHERE, THE CROSS-SECTIONAL AREA OF THE HEAD PORTION CARRYING SAID FIRST SEALING RING BEING SLIGHTLY GREATER THAN THE CROSS-SECTIONAL AREA OF THE CYLINDRICAL PORTION CARRYING SAID SECOND SEALING RING, WHEREBY SAID VALVE IS URGED IN A DIRECTION TO CLOSE SAID ORIFICE BY THE CO-ACTION OF GAS PRESSURE IN SAID HIGH PRESSURE CHAMBER ON SAID FIRST SEALING RING, SPRING PRESSURE FROM SAID SECOND SPRING, AND RELATIVELY CONSTANT ATMOSPHERIC PRESSURE ACTING ON THE BASE OF SAID VALVE, AND IS URGED IN A DIRECTION TO OPEN SAID ORIFICE BY THE CO-ACTION OF GAS PRESSURE IN SAID HIGH PRESSURE CHAMBER ON SAID SECOND PISTON RING AND SPRING PRESSURE FROM SAID FIRST SPRING ACTING ON SAID DIAPHRAGM, THE FORCE TENDING TO CLOSE THE VALVE DUE TO GAS PRESSURE IN SAID HIGH PRESSURE CHAMBER BEING SLIGHTLY GREATER THAN THAT TENDING TO OPEN THE VALVE DUE TO THE DIFFERENCE IN THE CROSS-SECTIONAL AREAS OF THE PORTIONS OF THE VALVE CARRYING SAID FIRST AND SECOND SEALING RINGS.