Filter cartridge

Details Filter cartridge Filter cartridge

1989-12-07

1991-10-01

Hruskoci, Peter

Liquid purification or separation

Structural installation

Closed circulating system

210484, 210488, 119 5, E04H 320, A01K 6304

Patent

active

050531255

ABSTRACT:
A filter cartridge comprising a framework and a surrounding envelope of filter material. The framework is reusable and provided with a rough, granular surface texture to provide increase surface area available for the propagation of aerobic bacteria. The envelope is disposable. Thus, biological filtration of the water provided by the aerobic bacteria is not interrupted upon replacement of the filter material. A second filter medium may be disposed within the envelope. The envelope is held in place by a pair of flaps which sandwich an edge of the filter material.

REFERENCES:
patent: 3513978 (1970-05-01), Newstedden
patent: 3525435 (1970-08-01), Conner
patent: 3558441 (1969-06-01), Dockery et al.
patent: 4036756 (1977-06-01), Dockery
patent: 4285813 (1981-08-01), Steward et al.
patent: 4512885 (1985-04-01), Willinger
patent: 4783258 (1988-11-01), Willinger et al.
patent: 4877526 (1989-10-01), Johnson et al.
patent: 4880549 (1989-11-01), Willinger et al.

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