초록 ▼

A regulating valve is disclosed for controlling the flow of fluid from a variable pressure fluid supply. The valve includes a diaphragm which is resiliently biased into a normally closed position, and which shifts to an open position when exposed to a fluid pressure above a predetermined minimum lev

A regulating valve is disclosed for controlling the flow of fluid from a variable pressure fluid supply. The valve includes a diaphragm which is resiliently biased into a normally closed position, and which shifts to an open position when exposed to a fluid pressure above a predetermined minimum level.

대표청구항 ▼

[I claim:] [1.]a housing having axially aligned inlet and outlet ports adapted to be connected respectively to said fluid supply and said fluid outlet, and a diaphragm chamber interposed between said inlet and outlet ports, said inlet port being separated from said diaphragm chamber by a barrier wal

[I claim:] [1.]a housing having axially aligned inlet and outlet ports adapted to be connected respectively to said fluid supply and said fluid outlet, and a diaphragm chamber interposed between said inlet and outlet ports, said inlet port being separated from said diaphragm chamber by a barrier wall, said barrier wall having a first passageway extending therethrough from an inner side facing said diaphragm chamber to an outer side facing said inlet port;a cup contained within said diaphragm chamber, said cup having a cylindrical side wall extending from a bottom wall facing said outlet port to a circular rim surrounding an open mouth facing the inner side of said barrier wall, the cylindrical side and bottom walls of said cup being spaced inwardly from adjacent interior surfaces of said housing to define a second passageway connecting said diaphragm chamber to said outlet port;a resilient disc-shaped diaphragm closing the open mouth of said cup, said diaphragm being axially supported exclusively by said circular rim and having a peripheral flange overlapping said cylindrical side wall;a piston assembly secured to the center of said diaphragm, said piston assembly having a cap on one side of said diaphragm facing the inner side of said barrier wall, and a base suspended from the opposite side of said diaphragm and projecting into the interior of said cup;a stem projecting from said cap through the first passageway in said barrier wall to terminate in a valve head, said valve head and the outer side of said barrier wall being configured to define a control orifice connecting said inlet port to said diaphragm chamber via said first passageway; andspring means in said cup coacting with the base of said piston assembly for resiliently urging said diaphragm into a closed position against the inner side of said barrier wall to thereby prevent fluid flow from said inlet port via said first passageway into said diaphragm chamber;said spring means being responsive to fluid pressure above a predetermined level applied to said diaphragm via said inlet port and said first passageway by resiliently accommodating movement of said diaphragm away from the inner side of said barrier wall, with the valve head on said stem being correspondingly moved to adjust the size of said control orifice, thereby maintaining a substantially constant flow of fluid from said inlet port through said first and second passageways to said outlet port for delivery to said fluid outlet.