Liquid purification or separation – Structural installation – Closed circulating system
Patent
1979-08-02
1981-10-20
Granger, Theodore A.
Liquid purification or separation
Structural installation
Closed circulating system
E04H 320
Patent
active
042959659
ABSTRACT:
An underwater filter for aquaria has a base portion (1) on which several similarly constructed filter cassettes (6) are located above each other. The filter cassettes (6) are made to be essentially rectangular of block-like shape and have two filter chambers (68, 69) as well as a clear-water (66). The clear-water chamber (66) is positioned between the two filter chambers (68 and 69) and is in flow communication with the base portion (1), the covers (61, 62) formed with apertures (610, 620) therethrough of the essentially rectangular block-like cassette (6) are removable, whereby access to the filter materials in the filter chambers (68 and 69) is possible. In operation, the aquarium water to be filtered is sucked by means of a pump connected to the base portion through the slits (610, 620) in the filter chambers (68 and 69) and from there into the clear-water chamber (66) and connecting thereto into the base portion (1) and then returned to the aquarium. To increase the filter capacity, several filter cassettes can be located on a base portion or several base portions with filter cassettes arranged thereon can be interconnected in flow communication.
REFERENCES:
patent: 3487440 (1969-12-01), Newsteder
patent: 3513978 (1970-05-01), Newsteder
patent: 3669297 (1972-06-01), Willinger
patent: 3768651 (1973-10-01), Streeter
patent: 3835813 (1974-09-01), Katz
patent: 3848567 (1974-11-01), Garber, Jr.
patent: 3891555 (1975-06-01), Bennett et al.
patent: 3957634 (1976-05-01), Orensten
patent: 4067809 (1978-01-01), Kato
patent: 4133760 (1979-01-01), Opqua
patent: 4148730 (1979-04-01), Willizer
patent: 4206719 (1980-06-01), Faris
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