Fluid handling – Line condition change responsive valves – Bi-directional flow valves
Patent
1994-03-22
1996-01-02
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
Bi-directional flow valves
137469, 137523, F16K 17196
Patent
active
054799783
ABSTRACT:
A combination pressure-vacuum relief valve assembly is provided for mounting in a port of a container. A two-part, generally hollow valve housing defines a valve chamber and includes a housing body part adapted for mounting in the port and which has an inlet communicating with the container. A housing cap part is secured to the body part and defines an outlet therebetween. A pressure valve seat is formed on the housing body part surrounding the inlet. A two-part, generally hollow pressure valve is movably mounted within the valve chamber and includes a valve body part for engaging the pressure valve seat. The valve body part includes a first vacuum relief passage communicating with the container through the inlet. A valve cap part is secured to the valve body part and includes a second vacuum relief passage communicating with atmosphere through the outlet. A first spring is provided in the pressure valve and is operatively associated with the housing, outside the pressure valve, for yieldably biasing the pressure valve against the pressure valve seat. A vacuum relief valve seat is formed on the pressure valve surrounding the second vacuum relief passage. A vacuum relief valve is movably mounted within the generally hollow pressure valve for engaging the vacuum relief valve seat. A second spring is provided in the pressure valve for yieldably biasing the vacuum relief valve against the vacuum relief valve seat.
REFERENCES:
patent: 1326124 (1919-12-01), Vischer
patent: 1342985 (1920-06-01), Cash
patent: 2133200 (1938-10-01), Kenneweg
patent: 2295486 (1942-09-01), Lebus
patent: 3127907 (1964-04-01), Novak
patent: 3968897 (1976-07-01), Rodgers
patent: 4498493 (1985-02-01), Harris
patent: 4805663 (1989-02-01), Szlaga
patent: 5165445 (1992-11-01), Vertanen
Nilson Robert G.
Trans Tech Industries, Inc.
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