Compound check valve

Details Compound check valve Compound check valve

1980-08-04

1983-01-18

Nilson, Robert G.

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

1375125, F16K 1502

Patent

active

043687520

ABSTRACT:
A compound check valve device comprising a housing having a pair of oppositely disposed inlet ports and an outlet port therebetween, a hollow, two-part valve carrier reciprocably operable in the housing between the inlet ports for selectively communicating the inlet ports, singly or concurrently, to the outlet port, and a spring disposed between the two parts of the valve carrier for biasing respective valves mounted on the valve carrier toward respective valve seats surrounding the two inlet ports so that, in the absence of pressure at the inlet ports, the valve carrier assumes a neutral position in which the inlet ports are cut off from the outlet port, and when pressure is supplied to the inlet ports, the valve carrier assumes a position according to the relative pressures at the inlet ports to communicate either both inlet ports or one inlet port to the outlet port.

REFERENCES:
patent: 730085 (1903-06-01), Berg
patent: 2311851 (1943-02-01), McClure
patent: 2761463 (1956-09-01), Wagner
patent: 3038487 (1962-06-01), Gardner
patent: 3107681 (1963-10-01), May
patent: 3805825 (1974-04-01), Lovingham
patent: 4261381 (1981-04-01), Geiling

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