Pleated filtering sleeve for rotational flow filter systems

Details Pleated filtering sleeve for rotational flow filter systems Pleated filtering sleeve for rotational flow filter systems

1992-07-23

1994-05-31

Dawson, Robert A.

Liquid purification or separation

Filter

Receptacle and modified spacing surface or support for...

2104935, 55500, 55521, B01D 2706

Patent

active

053166779

ABSTRACT:
A filter cartridge for use in a fluid filtering system, constructed to induce rotational flow in the unfiltered fluid, includes a pleated filter sleeve in which the individual sleeves are slanted relative to the sleeve circumference in a direction opposite to the direction of the rotational flow fluid. The slanted pleats can be constructed by creasing a sheet of filter media at alternatingly shorter and longer widths to form pleats having relatively shorter front legs and relatively longer back legs. The shorter front legs bias the pleats in the counter-rotational direction.

REFERENCES:
patent: 2801009 (1957-07-01), Bowers
patent: 4552657 (1985-11-01), Ogawa
patent: 4655921 (1987-04-01), Fujinata
patent: 4673503 (1987-06-01), Fujinata
patent: 4738778 (1988-04-01), Taki et al.
patent: 4746432 (1988-05-01), Taki et al.

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