Backwashable filter

Details Backwashable filter Backwashable filter

1981-04-07

1982-11-09

Wyse, Thomas G.

Liquid purification or separation

Filter

With residue removing means or agitation of liquid

210498, 210485, B01D 2938

Patent

active

043583717

ABSTRACT:
A backwashable filter includes a generally cylindrical housing, an inlet opening into the housing and an outlet opening from the housing, a cylindrical filter basket within the housing and arranged between the inlet and the outlet openings, and a backwashing arm bearing against the inside of the filter basket and being rotatable around the inside face of the filter basket. The filter basket comprises a perforated core a filter medium wrapped around the perforated core and a perforated flexible outer clamping band wrapped around the outside of the filter medium with tensioning means to apply tension to the clamping band to clamp the filter medium tightly against the perforated core. This clamping band constrains the filter medium and so prevents it flexing with rotation of the backwashing arm and this enhances its life. The performance of the filter is also increased since leakage of the liquid to be filtered around edges of the filter medium is more easily prevented particularly when split clamping rings are also provided.

REFERENCES:
patent: 2910183 (1959-10-01), Hayes
patent: 3016984 (1962-01-01), Getzin
patent: 3511374 (1970-05-01), Beal
patent: 3574509 (1971-04-01), Zentis et al.
patent: 3840123 (1974-10-01), McClure
patent: 4178246 (1979-12-01), Klein

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