Two-stage pressure relief valve

Details Two-stage pressure relief valve Two-stage pressure relief valve

1981-05-15

1983-07-12

Nilson, Robert G.

Fluid handling

Control by change of position or inertia of system

1375123, 1375125, F16K 1736

Patent

active

043925073

ABSTRACT:
A two-stage valve adapted for use in downward flow in the fuel line of a vehicle to provide roll-over protection, comprising a housing having two ball check valves axially disposed to normally check upward flow, the lower ball being expansion-biased spring-loaded, the upper ball being loaded with an expansion-biased spring resting upon the lower ball, the lower ball being larger than the upper ball, and the upper spring having a lower spring force than the lower spring.

REFERENCES:
patent: 4005724 (1977-02-01), Courtot
patent: 4340084 (1982-07-01), Snow

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