Patent ID: 8550113

Claim:
A single stage regulator for the flow of gas comprising: (a) a body having an inlet, an outlet and a valve between said inlet and said outlet, said valve yieldingly movable along an axis from a closed position to an open position; (b) a compartment space between said valve and said outlet positioned to receive gas flowing through said valve when said valve is open, said compartment space communicating with said outlet; (c) a diaphragm on the opposite side of said compartment space from said valve, said diaphragm movable in response to a reduction in pressure in said compartment space to reduce the size of said compartment space; (d) one or more cam members engaged to said diaphragm and movable in response to movement of said diaphragm, movement of said cam members in response to a reduction in pressure causing axial movement of said valve to an open position permitting flow of gas from said inlet, to said compartment space and to said outlet; (e) an axially extending opening including (i) a first chamber housing said valve for receiving gas from said inlet, (ii) a second chamber between said first chamber and said diaphragm and (iii) a first passageway between said first chamber and said second chamber, said first passageway being smaller in size than both said first chamber and said second chamber; (f) a seal mounted on said valve for closing said first passageway; (g) a valve housing axially spaced from said seal encircling a portion of said valve, said valve housing having an axial passageway between said first chamber and atmosphere, said axial passageway being sealed with seal rings is substantially the same area as said first passageway, said valve including reduced size extension slidably engaged in said axial passageway, and (h) a spring yieldingly urging said valve axially to a position at which said seal closes the passageway between said first chamber and said second chamber.