Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1975-05-01
1976-11-30
Granger, Theodore A.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
210 70, 210 83, 210169, 210513, C02B 134, E04H 320
Patent
active
039948072
ABSTRACT:
An aquarium water-clarifying system is disclosed in which water at one location from near the tank bottom or gravel is raised through a first tube into a container to an accumulated level above water level in the tank; such raised water is transiently retained for water-surface air exposure in the container, and air-laden surface water from the container is then returned to the tank through a second return tube that also terminates near the tank bottom. The lower ends of both tubes are spaced from each other and give rise to a gentle circulation or sweep of primarily the stratum near the tank bottom, using only the air-laden surface water from the container. Under controlled conditions, in one embodiment, the return flow of such air-laden water may contain an intermittent stream of air bubbles.
REFERENCES:
patent: 2672845 (1954-03-01), Schneithorst
patent: 2744065 (1956-05-01), Lacey
patent: 3006476 (1961-10-01), Halpert
patent: 3688907 (1972-09-01), Pravec
patent: 3722685 (1973-03-01), Olensten et al.
patent: 3768651 (1973-10-01), Streeter
patent: 3768652 (1973-10-01), Jardin
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