Fluid handling – With casing – support – protector or static constructional... – Guards and shields
Patent
1998-02-23
1999-09-28
Ferensic, Denise L.
Fluid handling
With casing, support, protector or static constructional...
Guards and shields
1374937, 1374939, 137526, 1375121, 1375125, 137510, 1374925, B65D 5116
Patent
active
059571578
ABSTRACT:
A pressure/vacuum vent of the present invention is mountable to the vent pipe of a storage tank. The vent includes a valve housing having a wall defining a chamber which is in fluid communication with said storage tank. It includes a first valve responsive to an over-pressure condition of a first pressure, a second valve responsive to an over-pressure condition at a second pressure; and a third valve responsive to an under-pressure condition. The first and second pressures are different so that one valve will open at a small pressure and the other will open at a larger pressure. The first valve is a poppet valve, and the second and third valves are diaphragm valves. The valve housing is contained in a vent housing. The vent housing includes a floor through with a bottom stem of the valve housing extends and which has drain holes. A cover is mounted to a top portion of the valve housing to cover the vent housing. The cover is spaced from a top of the vent housing.
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Fink, Jr. Arthur C.
Mitchell Thomas O.
Denk Paul M
Farid Ramyar
Ferensic Denise L.
Husky Corporation
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