Balanced pressure regulator

Claim 1

IN A PRESSURE REGULATOR; A SLEEVE HAVING ONE END PORTION EXTERNALLY THREADED AND FORMED WITH A CYLINDRICAL BORE AND OTHER END PORTION ENLARGED AND INTERNALLY THREADED, AN INLET PORT IN SAID ONE END PORTION INTERMEDIATE THE ENDS OF THE BORE, AND A GROOVE CUT ACROSS THE EXTERNAL THREADS TO COMMUNICATE A SOURCE OF HIGH PRESSURE FLUID WITH SAID INLET PORT; A TUBULAR VALVE INSERT HAVING AN INLET PORT SECURED IN SAID SLEEVE BORE SO THAT ITS INLET PORT COMMUNICATES WITH THE SLEEVES INLET PORT, A ROD-LIKE POPPET HAVING A REDUCED CENTRAL PORTION SLIDABLY DISPOSED IN SAID VALVE INSERT BORE SO THAT THE REDUCED CENTRAL PORTION IS AT ALL TIMES OPPOSITE THE VALVE INSERT INLET PORT, ONE END OF SAID POPPET BEING OF A DIAMETER TO BE SNUGLY RECEIVED IN SAID BORE AND CONTINUOUSLY PROJECTING FROM SAID BORE THOUGH ALWAYS SEALING IT, THE OTHER END OF SAID POPPET HAVING A DIAMETER AT LEAST EQUAL TO THE DIAMETER OF SAID BORE AND COOPERATING WITH THE OTHER END OF THE VALVE INSERT TO EFFECT A FLUID SEAL IN THE CLOSED POSITION OF THE POPPET AND TO PROVIDE AN OUTLET PORT THEREBETWEEN IN THE OPEN POSITION OF THE POPPET; A SPRING GUIDE SEATED UPON THE EXTENDING END OF THE POPPET; AN EXTERNALLY THREADED SPRING RETAINER SCREWED INTO THE ENLARGED END PORTION OF THE SLEEVE; AND A COMPRESSION SPRING DISPOSED BETWEEN THE SPRING GUIDE AND THE SPRING RETAINER TO URGE THE POPPET INWARDLY FROM A CLOSED TO AN OPEN POSITION.