Patent ID: 6557820
Filing Date: 2003-05-06
Classification: F15C,F16K,Y10T

Abstract:
A two-stage valve for controlling the flow of gas therethrough from a pressurized gas supply comprising:an upper main body including a cavity therein; a lower main body having a plurality of pressurized gas supply exhaust outlet passages forming a primary flow path with the pressurized gas supply, said primary flow path including an inlet passage for the flow of gas from the pressurized gas supply; a pre-stressed diaphragm sandwiched between said upper and lower main bodies, said pre-stressed diaphragm having one side of a portion thereof in fluidic communication with said cavity, and the opposite side of said portion thereof in fluidic communication with the pressurized gas supply; and pressure control means fluidically coupled to said cavity for controlling the pressure in said cavity to cause said portion of said pre-stressed diaphragm to open the flow of gas from the pressurized gas supply through said primary flow path of said two-stage valve and to cause said portion of said pre-stressed diaphragm to close the flow of gas from the pressurized gas supply through said primary flow path of said two-stage valve, and at least one of said plurality of supply gas exhaust outlet passages is directed such that a component of supply gas exhaust outlet velocity is in a direction opposite to a component of supply gas exhaust outlet velocity in at least one other of said plurality of supply gas exhaust outlet passages.