Restrictive vent

Details Restrictive vent Restrictive vent

1978-05-30

1980-03-25

Cline, William R.

Fluid handling

Systems

System with plural openings, one a gas vent or access opening

F16K 4502

Patent

active

041945301

ABSTRACT:
A restrictive vent suitable for use with underground flammable liquid and other storage tanks which includesan atmospheric opening considerably smaller than the inside diameter of the underground tank vent line. The restrictive vent connects in series with a combination pressure/vacuum vent to both allow the tank to breathe and also to act as a safety vent in the event that the pressure/vacuum vent device becomes inoperative.

REFERENCES:
patent: 2249180 (1941-07-01), Scully et al.
patent: 3391818 (1968-07-01), Hairston
patent: 3392921 (1968-07-01), Demaison
patent: 3403809 (1968-10-01), Kennedy et al.
patent: 3739937 (1973-06-01), Stock

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