Aquarium undergravel filter

Details Aquarium undergravel filter Aquarium undergravel filter

1996-04-05

1997-09-16

McCarthy, Neil

Liquid purification or separation

Structural installation

Closed circulating system

210293, 210456, 210805, A01K 6304

Patent

active

056676727

ABSTRACT:
The present invention is directed to an aquarium undergravel filter. In particular, the undergravel filter of the present invention contains chambers on its underside. The chambers, which are roughly equal in size, are separated by baffles and have openings which allow water to flow into flow channels which lead to the lift tube holes. The chambers and flow channels provide for equal filtration over the entire surface of the filter plate. In a preferred embodiment, the undergravel filter of the present invention also contains an anti-dig grid which prevents fish from digging the gravel on the plate of the filter by use of an anti-dig grid. The anti-dig grid is located on the top surface of the filter and prevents fish from removing the gravel and exposing the openings in the filter.

REFERENCES:
patent: 2636473 (1953-04-01), Schwartz et al.
patent: 2935199 (1960-05-01), Willinger
patent: 3119774 (1964-01-01), Arak
patent: 3827560 (1974-08-01), Morton
patent: 3867292 (1975-02-01), Cornell
patent: 4995980 (1991-02-01), Jaubert
patent: 5066394 (1991-11-01), Harrison
patent: 5171437 (1992-12-01), Fletcher, Sr.
patent: 5536398 (1996-07-01), Reinke

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