Liquid purification or separation – Structural installation – Closed circulating system
Patent
1979-09-21
1981-05-05
Adee, John
Liquid purification or separation
Structural installation
Closed circulating system
210232, 210451, 2104162, B01D 3502
Patent
active
042657512
ABSTRACT:
An external aquarium filter is disclosed, the filter including a filter receptacle having a filter chamber for receiving contaminated aquarium water and having a clean water chamber. The two chambers are separated by a filter bed, with the clean water chamber being located above the filter chamber, whereby the flow of water is upwardly through the filter bed. A siphon input tube supplies the aquarium water to the filter chamber, and an output conduit supplies the clean water from the clean water chamber back to the aquarium tank. A commercially available aquarium air pump provides compressed air into the output conduit in order to airlift the clean water from the siphon level into the aquarium tank. The filter bed can include a layer of open cell reticulated foam plastic material, such as polyurethane foam, and a layer of activated carbon.
REFERENCES:
patent: 2729337 (1956-01-01), Alferman
patent: 2935199 (1960-05-01), Willinger
patent: 3321082 (1967-05-01), Willinger
patent: 3324829 (1967-06-01), De Jose et al.
patent: 3441145 (1969-04-01), Pearson
patent: 3485373 (1969-12-01), Powers
patent: 3554375 (1971-01-01), Willinger
patent: 3785494 (1974-01-01), Sama
patent: 3835813 (1974-09-01), Katz
patent: 4039448 (1977-08-01), Etani
patent: 4067809 (1978-01-01), Kato
Adee John
Willinger Bros. Inc.
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