Self-flushing filter

Liquid purification or separation – Flow – fluid pressure or material level – responsive – Filter cleaning

Patent

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Details

210108, 210355, B01C 2938

Patent

active

040453456

ABSTRACT:
An in-line self-flushing filter comprises a cylindrical filter body within a housing, a rotatable member defining a purging chamber having an inlet opening close to and facing the cylindrical surface of the filter body, a purging conduit fixed to the rotary member, and a valve between the purging chamber and the purging conduit. The latter valve is normally closed but is automatically opened by a diaphram sensor sensing the difference in pressure between the filter inlet and outlet to establish communication between the purging chamber and purging conduit and thereby to effect a reverse flow of the fluid through the filter body into the purging chamber and out through the purging conduit. The outlet end of the purging conduit is eccentric to the axis of rotation of the rotatable member so as to rotate same by the reaction force of the fluid exiting from the purging conduit, and thereby to cause the inlet opening of the rotatable member to sweep along the complete cylindrical surface of the filter body.

REFERENCES:
patent: 2422735 (1947-06-01), Guarnia
patent: 3574509 (1971-04-01), Zentis et al.
patent: 3717252 (1973-02-01), Picard
patent: 3959140 (1976-05-01), Legaas

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