Pressure regulating valves utilizing a bar spring

Claim 1

A PRESSURE REGULATING VALVE COMPRISING A CASING HAVING OPPOSED SPACED MAIN WALLS AND A PERIPHERAL WALL EXTENDING THEREBETWEEN, A REMOVABLE INSERT MOUNTED IN THE CASING AND COMPRISING A MAIN WALL EXTENDING PARALLEL TO AND SPACED FROM A CASING MAIN WALL AND HAVING A PERIPHERAL WALL SPACED FROM THE CASING PERIPHERAL WALL AND EXTENDING TOWARDS THE OTHER CASING MAIN WALL, SAID INSERT MAIN WALL HAVING AN OPENING AND A RECESS THEREIN CENTRALLY THEREOF, SAID RECESS OPENING TOWARDS THE CASING MAIN WALL FROM WHICH THE INSERT MAIN WALL IS SPACED, A PUSHER FREELY FITTING WITHIN THE INSERT PERIPHERAL WALL SPACED FROM THE INSERT MAIN WALL AND FROM SAID OTHER CASING MAIN WALL, THE SPACES BETWEEN THE INSERT MAIN WALL AND THE PUSHER AND THE ADJACENT CASING MAIN WALLS FORMING RESPECTIVELY INNER AND OUTER CHAMBERS, HEAD MEANS CONNECTED TO THE PUSHER AND SLIDABLY EXTENDING THROUGH SAID INSERT MAIN WALL OPENING INTO THE RECESS THEREOF, PARALLEL INNER AND OUTER FLEXIBLE DIAPHRAGMS LYING OVER THE INSERT MAIN WALL AND THE PUSHER RESPECTIVELY AND FIXED WITHIN THE CASING, THE DIAPHRAGM OVER THE INSERT MAIN WALL BEING BACKED THEREBY AND HAVING ITS CENTRAL PORTION EXTENDING ACROSS THE RECESS AND THE HEAD MEANS THEREIN, AN OPENING IN THE CASING WALL COMMUNICATING WITH THE INNER CHAMBER OPPOSITE THE CENTRAL PORTION OF THE INNER DIAPHRAGM, AN ANNULAR SEAT ON THE LAST MENTIONED CASING WALL FORMED AROUND SAID OPENING AND EXTENDING TOWARDS AND TERMINATING NEAR THE CENTRAL PORTION OF THE INNER DIAPHRAGM, AN INLET PORT FOR THE CASING COMMUNICATING WITH THE INNER CHAMBER THORUGH THE ANNULAR SEAT, AN OUTLET PORT FOR THE CASING COMMUNICATING WITH THE INNER CHAMBER OUTSIDE THE SEAT, A FULCRUM POINT ON THE PUSHER CENTRALLY THEREOF AND EXTENDING TOWARDS THE INSERT MAIN WALL, SAID PERIPHERAL WALL OF THE INSERT HAVING A HOLE THEREIN, A SPRING BAR EXTENDING BETWEEN THE PUSHER AND THE INSERT MAIN WALL AND HAVING AN END EXTENDING FREELY INTO THE HOLE IN THE INSERT PERIPHERAL WALL, SAID SPRING BAR FREELY ENGAGING SAID FULCRUM POINT AND NORMALLY URGING THE PUSHER OUTWARDLY AGAINST THE OUTER DIAPHRAGM AND THE HEAD MEANS AWAY FROM THE ANNULAR SEAT, AN ADJUSTING SCREW THREADED THROUGH THE INSERT MAIN WALL AND ENGAGING THE SPRING BAR NEAR THE OPPOSITE END THEREOF TO ADJUST THE PRESSURE OF SAID BAR AGAINST THE FULCRUM POINT AND PUSHER, PASSAGE MEANS EXTENDING FROM THE OUTLET PORT AND OPENING INTO THE OUTER CHAMBER WHEREBY THE PRESSURE OF FLUID LEAVING THE OUTLET PORT AFTER PASSING THROUGH THE VALVE IS TRANSFERRED TO THE OUTER CHAMBER, SAID INSERT PERIPHERAL WALL HAVING A SLOT THEREIN OPPOSED TO THE HOLE IN THE LATTER WALL, SAID SLOT EXTENDING IN A DIRECTION AWAY FROM THE INSERT MAIN WALL, THE END OF THE SPRING BAR WHICH IS ENGAGED BY THE ADJUSTING SCREW EXTENDING THROUGH SAID SLOT, SAID SCREW BEING LOCATED OUTSIDE THE INSERT PERIPHERAL WALL, AND WHEN THE FLUID PRESSURE IN SAID OUTLET CHAMBER AGAINST THE OUTER DIAPHRAGM AND THE PUSHER IS SUFFICIENT TO OVERCOME THE PRESSURE OF THE SPRING BAR THE HEAD MEANS OF THE PUSHER MOVES THE INNER DIAPHRAGM AGAINST THE SEAT TO STOP THE FLOW OF FLUID THERETHROUGH.