(under subclass 318) Devices wherein the reciprocating member that opens and closes or controls flow of fluid through the valve consists of a flat or cup shaped member of relatively thin deformable material secured at its periphery to the valve body.
SEE OR SEARCH THIS CLASS, SUBCLASS:
61.2+, for an expansible chamber valve actuator having a flexible wall working member which functions as a valve element to control the flow of fluid through the valve.
SEE OR SEARCH CLASS
137, Fluid Handling,
843+, for resilient material, direct response valves.
