Backwashable filter

Details Backwashable filter Backwashable filter

1984-04-11

1986-09-30

Nozick, Bernard

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Filter cleaning

B01D 4100

Patent

active

046145818

ABSTRACT:
A backwashable filter comprises a filter body, a backwash nozzle having an inlet adjacent to the upstream surface of the filter body, and a control device sensing a pressure drop across the filter body and effective to initiate a backwash operation by connecting the backwash nozzle to the atmosphere and effecting relative rotary movement between the filter body and the backwash nozzle. The control device includes further means effective, upon sensing a higher pressure drop, to automatically terminate the backwash operation.

REFERENCES:
patent: 2178463 (1939-10-01), Bahnson
patent: 3018791 (1962-01-01), Knox
patent: 3400734 (1968-09-01), Rosenberg
patent: 3460557 (1969-08-01), Gallant
patent: 4042504 (1977-08-01), Drori
patent: 4045345 (1977-08-01), Drori
patent: 4271018 (1981-06-01), Drori
patent: 4278540 (1981-07-01), Drori
patent: 4295963 (1981-10-01), Drori
patent: 4312374 (1982-01-01), Drori

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