Pressure vacuum relief valve assembly

专利名称：Pressure vacuum relief valve assembly发明人：Claude A. Smith,Donald L. Williams申请号：US05/504138申请日：19740909公开号：US03937358A公开日：19760210

摘要：A pressure vacuum relief assembly for a container includes a housing with a firstport in communication with the container and a second port in communication withatmosphere; the housing encloses improved vacuum and pressure relief valve meansincluding first and second diaphragm members each having central openings thereinengageable with conical surfaces on vacuum relief and pressure relief seal members; saidfirst and second diaphragms form a control chamber in communication with the first portwhich is selectively pressurized to cause selective snap movement of each of thediaphragms to control flow across the seal members between atmosphere and thecontainer.

申请人：GENERAL MOTORS CORPORATION

代理人：J. C. Evans

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