Pneumatically-operated filtering apparatus with filter movement

Details Pneumatically-operated filtering apparatus with filter movement Pneumatically-operated filtering apparatus with filter movement

1991-12-30

1993-06-22

Drodge, Joseph W.

Liquid purification or separation

Flow, fluid pressure or material level, responsive

210122, 210123, 210387, 210401, B01D 33044

Patent

active

052214680

ABSTRACT:
Filtering apparatus employs both pneumatic controls and a pneumatic drive to eliminate all electrical components. The filtering apparatus includes a perforate plate and a tank with a strip of filtering media supported on the plate. Contaminated liquid is supplied from above and clean liquid is removed from below the filtering media and plate. The filtering media is advanced across the plate by conveying apparatus. The pneumatic drive for the conveying apparatus is operated by pneumatic controls and a float which actuates the drive when the liquid in the tank rises to a predetermined level as the filtering media becomes plugged. The drive is shut off when the liquid drops to a lower predetermined level.

REFERENCES:
patent: Re32135 (1986-05-01), Creps et al.
patent: 3087620 (1963-04-01), Hirs
patent: 4137169 (1979-01-01), El-Hindi
patent: 4448683 (1984-05-01), Green
patent: 4477350 (1984-10-01), Brandt et al.
patent: 4844798 (1989-07-01), Fox
patent: 4865724 (1989-09-01), Brandt et al.
patent: 5112485 (1992-05-01), Hirs

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