Filtering elements

Details Filtering elements Filtering elements

1978-01-03

1979-07-31

Cuchlinski, Jr., William A.

Baths, closets, sinks, and spittoons

Flush closet

With recirculating means

4317, 4420, 210411, 210416F, 2104971, 417395, 417540, E03D 501, B01D 3502

Patent

active

041625498

ABSTRACT:
A back-washable filtering element, especially for use with pumps, and more particularly for use with pumps that handle liquids with solid material entrained therein, consists of a helical coil spring disposed in a flow path for the liquid to be filtered. A movable element in the flow path is mechanically connected to the spring and compresses it axially under the effect of the back washing liquid to automatically reduce the flow capacity. The resultant "shrugging" of the spring also permits it to clear itself of filtered material to facilitate the back-washing.

REFERENCES:
patent: 2464196 (1949-03-01), Van Ranst
patent: 2735366 (1956-02-01), Hunter
patent: 3228036 (1966-01-01), Zaske et al.
patent: 3294030 (1966-12-01), Fox
patent: 3912423 (1975-10-01), Pfabe

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