Drum filter with divergent hole perforated filter media

Details Drum filter with divergent hole perforated filter media Drum filter with divergent hole perforated filter media

1988-12-27

1990-09-18

Jones, W. Gary

Liquid purification or separation

Filter

Imperforate drum, medium on arc, chord or end

210396, 210402, 2104942, 209270, B01D 3304

Patent

active

049576305

ABSTRACT:
A drum filter is disclosed in which a filter media layer is applied over a section of a drum member disposed in a tank which receives a liquid to be filtered, the filter media layer constructed of a thin metal with a pattern of holes formed by chemical etching, with the diameters thereof increasing in the direction of flow. The diverging hole shape reduces the tendency for plugging of the hole. One or more scraper blades are urged against the filter media layer which is rotated past the scraper blade causing a flexing of each section of the filter media layer to unplug any holes which do become clogged.

REFERENCES:
patent: 2910183 (1959-10-01), Hayes
patent: 3420373 (1969-01-01), Hunter
patent: 3581903 (1971-06-01), Holz
patent: 4276159 (1981-06-01), Lehman
patent: 4288330 (1981-09-01), Strub
patent: 4407720 (1983-10-01), Bratten
patent: 4619737 (1986-10-01), Halz
patent: 4663040 (1987-05-01), Elizonda et al.
patent: 4670143 (1987-06-01), Bratten
patent: 4681689 (1987-07-01), Stannard et al.

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