Liquid purification or separation – Structural installation – Closed circulating system
Patent
1975-08-20
1977-07-12
Granger, Theodore A.
Liquid purification or separation
Structural installation
Closed circulating system
210197, 210244, 210416AS, E04H 320
Patent
active
040352986
ABSTRACT:
An elongated air discharge tube extends along the bottom of a chamber in an elongated housing. The housing is placed on the bottom of an aquarium tank along a side wall thereof. The tube includes a plurality of upwardly directed air discharge openings. The discharged air flows upwardly through the chamber and then through openings in the chamber's lid, to issue as a wall of air bubbles into the tank. The rising air bubbles create a circulation pattern of the water in the tank, first upwardly with the air curtain, then laterally across the tank to the opposite wall thereof, then downwardly, then back along the bottom of the tank to the air curtain side of the tank. The inlet to the air pump chamber may include a filter chamber in which a replaceable filter material is provided, for mechanically removing suspended particles from the circulating water. In the preferred embodiment the elongated housing is removably insertable into a socket formed along one side of an under gravel filter member, so that the air pump will draw the water through a gravel filter bed provided on top of the filter member as well as through the filter chamber forming a part of the air pump assembly. The under gravel filter member includes a top wall formed to include a pattern of alternating ridges and valleys. The general plane of the top wall ascends from the side of the filter member opposite and air pump assembly to the air pump assembly side. Air passage openings are provided in the valley regions. The water flowing back along the bottom of the tank encounters the ascending sides of the ridges and is directed by them downwardly to the water passage openings. The air pump draws such water through these openings and into and through the filter material, and then through the air pump itself, before returning it to the main part of the tank.
REFERENCES:
patent: 3247826 (1966-04-01), Girard
patent: 3490416 (1970-01-01), Kelley et al.
patent: 3516544 (1970-06-01), Sesholtz
patent: 3529574 (1970-09-01), Kelly
patent: 3720318 (1973-03-01), Cohen
patent: 3720319 (1973-03-01), White
patent: 3738491 (1973-06-01), Dockery
patent: 3815547 (1974-06-01), Willinger et al.
Marine Aquarium Keeping, Stephen Spotte, 1973, John Wiley & Sons, Inc., pp. 25-43, New York, N.Y.
Cloke Stanley S.
Kogita Theodore F.
Con*Gor, Inc.
Granger Theodore A.
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