Patent ID: 6095484
Filing Date: 2000-08-01
Classification: F16K,Y10T

Abstract:
A spring diaphragm for use in automatic hydraulic control valves of the type having a valve body having an inlet chamber, and an outlet chamber and a spring diaphragm interposed between said inlet and outlet chambers, which spring diaphragm, as a result of hydraulic pressure, is automatically moveable between an open and closed position, in which said diaphragm allows and prevents, respectively, communication between said inlet and outlet chambers, comprising:a two-part diaphragm element including a first upper part and second lower part generally spaced apart from one another, said first lower part being in the form of a flexible elastic disc which performs the function of a hermetic seal between said inlet and outlet chambers when said spring diaphragm is in said closed position and said second upper part being connected to said first part and being in the form of a resilient disc which performs the function of a spring to normally bias said spring diaphragm from said open to said closed position, said first and second parts each having resilient spring-like ribs, said ribs on said first lower part serving to aid hermetic sealing when said diaphragm is in said closed position and said ribs on said second upper part serving to provide a main force to bias the diaphragm into said closed position.