Bi-directional pressure relief vent for a fuel tank

Details Bi-directional pressure relief vent for a fuel tank Bi-directional pressure relief vent for a fuel tank

1989-02-14

1990-05-08

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Bi-directional flow valves

1375124, 220209, F16K 1719

Patent

active

049229540

ABSTRACT:
A bi-directional vent for a fuel tank utilizes a resilient sealing member which in its unflexed state is a simple resilient washer. The sealing member is disposed inside a vent body, and forms both an inner and outer seal. The inner seal is formed between an inner circumferential edge on a central hole in the washer and a conical sealing surface attached to the vent body. The outer seal is formed between an outer annular sealing surface on the washer and a circumferential edge formed on a central opening in the vent body. Increased pressure in the tank causes the sealing member to deflect at its inner portion away from the circumferential edge on the vent body, resulting in outward venting. Reduced pressure in the tank causes the outer part of the sealing member to deflect away from the conical seating surface, resulting in inward venting.

REFERENCES:
patent: 465013 (1891-12-01), Bourdil
patent: 2270332 (1942-01-01), Osborn
patent: 3430648 (1969-03-01), Botkin

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