Vacuum breaker-pressure release device

Details Vacuum breaker-pressure release device Vacuum breaker-pressure release device

1980-02-07

1981-05-12

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Bi-directional flow valves

137533, 13753331, 220204, F16K 17194

Patent

active

042665680

ABSTRACT:
A vacuum breaker and pressure release valve for use with fuel storage tanks is disclosed which utilizes an intake check valve and an exhaust check valve to allow air to enter a tank from which fuel is being withdrawn by a pump while preventing air and volatized fuel from leaving the tank except during filling thereof. The check valves are formed by circular discs which can move upwardly and downwardly within cylindrical bores. In use, the invention permits a gasoline pump to operate without an opposed load caused by a vacuum within the tank which is being emptied, while preventing loss of fuel and pollution except when the tank is being filled.

REFERENCES:
patent: 2589 (1842-04-01), Creasey
patent: 325273 (1885-09-01), Richardson
patent: 718771 (1903-01-01), Kerfoot
patent: 1628069 (1927-05-01), Schmidt
patent: 1669739 (1928-05-01), Clark
patent: 1918807 (1933-07-01), Glab
patent: 1997116 (1935-04-01), Nielsen
patent: 2226022 (1940-12-01), Shutts
patent: 3235225 (1966-02-01), Dickinson
patent: 3999571 (1976-12-01), Pedersen

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