Double-check filler valve

Details Double-check filler valve Double-check filler valve

1991-09-20

1993-06-01

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

1375276, F16K 1503

Patent

active

052151174

ABSTRACT:
A double-check valve assembly including a single valve body which is threadingly insertable within a filler opening of a storage tank. Specifically, the check valve includes an upper check valve, a lower check valve and a free floating valve guide including means for controlling the operation of both upper and lower check valves. The valve guide is formed as a separate element and fits within the valve body and is preferably provided with a guide for the upper check valve and a pivot for the lower check valve. Moreover, the lower check valve is preferably eccentrically pivotally mounted on the valve guide. The valve guide is preferably spring biased in the direction opposite fluid flow to initially resist such flow. The valve assembly is designed such that fluid pressure acting on the double-check valve assembly during filling of the tank opens the upper check valve initially and then opens the lower check valve while displacing the free floating valve guide. The double-check valve assembly of the present invention includes a single valve body within which the double-check valve is provided so as to reduce leakage paths, while at the same time providing a device wherein the upper check valve can be easily serviced or replaced as necessary.

REFERENCES:
patent: 3283778 (1966-11-01), Linna
patent: 3542063 (1970-11-01), Etter
patent: 4259983 (1981-04-01), Kessel
patent: 4269215 (1981-05-01), Odar

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