Bypass reverse flow valve

Details Bypass reverse flow valve Bypass reverse flow valve

1985-11-25

1987-04-14

Schwadron, Martin P.

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

1374932, 13753331, 1375991, 210130, 210136, F16K 1718, B01D 3514

Patent

active

046570403

ABSTRACT:
A filter assembly including a housing and a filter element which includes a bypass/reverse flow valve coaxially disposed within the housing with the filter element and includes a central opening therethrough coaxially aligned with the opening in the filter element through which filtered fluid passes. In the forward flow direction a bypass valve opens responsive to a predetermined pressure differential appearing across the filter element to permit unfiltered fluid to flow from the source to the load without passing through the filter element. In the reverse flow direction, from the load to the source, a check valve closes and applied full load pressure to the reverse flow valve causing it to open with a second differential pressure which is lower than the bypass differential pressure to thereby permit free flow of fluid from the load to the source without passing through the filter.

REFERENCES:
patent: 1617711 (1927-02-01), Hennebohle
patent: 1844222 (1932-02-01), Jasper
patent: 2486164 (1949-10-01), Jerome
patent: 2499614 (1950-03-01), Thornhill
patent: 3323468 (1967-06-01), Thompson
patent: 3625248 (1971-12-01), Lhotellier
patent: 3656621 (1972-04-01), Barthe
patent: 3996137 (1976-12-01), Cooper
patent: 4249566 (1981-02-01), Deane

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