F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
137/16
F16K 17/26 (2006.01) F16K 17/19 (2006.01)
Patent
CA 1151502
Case 640 COMBINATION VACUUM RELIEF VALVE AND PRESSURE, RELIF VALVE WHICH ARE PROTECTED FROM THE ATMOSPHERE Abstract of the Disclosure A vacuum relief valve assembly includes a vacuum valve member located below a top cover plate and is thus protected from the atmosphere. First passageways defined in part by a bottom cover plate provide communication between the out- side atmosphere and the lower surface of the valve. Second passageways provide communication between the upper surface of the valve and the inside of the container. When the pressure in the container is below atmospheric, atmospheric pressure acting on the bottom of the valve lifts the valve and air flows through the first and second passageways until atmospheric pressure is reached in the tank. A pressure relief valve is mounted for pivotal movement re- lative to an opening providing communication between the pressure in the tank and the first passageways to vent pressure in the tank. The pressure relief valve is protected from the atmosphere by the top cover plate, and in one embodiment, by the vacuum relief valve.
370808
Dugge Richard H.
Rollins Dallas W.
Acf Industries Incorporated
Ridout & Maybee Llp
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