Pyramidic aquarium filter-aerator

Details Pyramidic aquarium filter-aerator Pyramidic aquarium filter-aerator

1978-10-27

1980-06-03

Granger, Theodore A.

Liquid purification or separation

Structural installation

Closed circulating system

E04H 320

Patent

active

042060540

ABSTRACT:
An aquarium filter-aerator device having a substantially pyramidic construction with water inlets on all sides that operates on an air-induced water flow principle anywhere along the bottom of an aquarium. The filter-aerator has an inner construction that defines a pre-filter chamber which accumulates impurities and a post-filter chamber for aerating the purified aquarium water. The particular construction and disposition of the filter-aerator facilitates the forming of a plurality of directional water currents to sweep aquarium impurities into the filter-aerator.

REFERENCES:
patent: 2653908 (1953-09-01), Rodda
patent: 2744065 (1956-05-01), Lacey
patent: 2782161 (1957-02-01), Willinger et al.
patent: 2786026 (1957-03-01), Stark
patent: 3247826 (1966-04-01), Girard
patent: 3347211 (1967-10-01), Falkenberg et al.
patent: 3362537 (1968-01-01), Cline
patent: 3477580 (1969-11-01), Willinger
patent: 3483985 (1969-12-01), Axelrod
patent: 3624777 (1971-11-01), Gardner
patent: 3720317 (1973-03-01), Willinger
patent: 3746168 (1973-07-01), Willinger et al.
patent: 3746169 (1973-07-01), Willinger et al.
patent: 4025431 (1977-05-01), Saxton

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