Filter assembly with modulating bypass valve

Details Filter assembly with modulating bypass valve Filter assembly with modulating bypass valve

1975-09-10

1977-10-11

Bascomb, Jr., Wilbur L.

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Fluid pressure responsive by-pass

210133, 210172, 210223, 210315, 210444, B01D 2904

Patent

active

040534103

ABSTRACT:
A filter assembly comprises a housing having a tubular filter and a bypass valve mounted therein. The valve comprises a spool having pressure modulating means thereon in the form of a tubular extension having a plurality of metering orifices formed therethrough. In normal operation, fluid is communicated from an inlet of the housing, through the filter and to an outlet. When the inlet pressure of the fluid exceeds a predetermined level due to clogging of the filter, for example, the fluid is communicated from the inlet to the outlet directly, through the metering orifices of the valve. The spool has a cylindrical portion which forms a sliding seal with a cylindrical bore defined in the housing to prevent premature opening of the bypass valve.

REFERENCES:
patent: 1802897 (1931-04-01), Holden et al.
patent: 2056756 (1936-10-01), Wiedhofft
patent: 2406308 (1946-08-01), Vokes et al.
patent: 2575995 (1951-11-01), Briggs et al.
patent: 2589920 (1952-03-01), Beckett
patent: 2605904 (1952-08-01), Ogilvie
patent: 3164551 (1965-01-01), Nugent
patent: 3235085 (1966-02-01), Humbert, Jr.
patent: 3342332 (1967-09-01), Kudlatt
patent: 3543935 (1970-12-01), Detrick
patent: 3794168 (1974-02-01), Perkins

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