Automatic changeover manifold

Details Automatic changeover manifold Automatic changeover manifold

1991-03-28

1991-11-05

Hepperle, Stephen M.

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

1374875, 137557, F16K 1124

Patent

active

050624431

ABSTRACT:
An automatic changeover manifold is described which permits an uninterrupted supply of fluid, for example, cryogenic liquified gas, from a source to a fluid delivery conduit. Liquid flow is controlled by solenoid-operated on-off valves which are switched from an open-condition to a closed-condition in response to a detected low pressure condition. When flow ceases in one feed line, the solenoid-operated valve in the other feed lines opens. The electrical circuit prevents both solenoid-operated valves from being open at the same time, provided an electric current is present in the circuit.

REFERENCES:
patent: 2402187 (1946-06-01), Siver
patent: 2547823 (1951-04-01), Josephian
patent: 2714292 (1955-08-01), Strandwitz et al.
patent: 3001541 (1961-09-01), St. Clair
patent: 3013573 (1961-12-01), Leuthner
patent: 3583421 (1971-06-01), Treloar
patent: 4341234 (1982-07-01), Meinass et al.
patent: 4597406 (1986-07-01), Loiseau et al.

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