Liquid purification or separation – Structural installation – Closed circulating system
Patent
1980-03-19
1982-01-26
Granger, Theodore A.
Liquid purification or separation
Structural installation
Closed circulating system
2104162, E04H 320
Patent
active
043127525
ABSTRACT:
A filter apparatus for an aquarium combines mechanical, chemical, and biological filters in a structure which can be hidden from view under the gravel at the bottom of the tank. A generally horizontally extending upper wall and attached supporting sides cooperate with the bottom of the tank to define a dispersion chamber. A filter box is supported above the upper wall and defines a filter cavity for retaining mechanical and chemical filter material with an inlet in fluid communication with a portion of the tank above the upper wall and an outlet in fluid communication with the dispersion chamber. The upper wall has a plurality of apertures formed therein for substantially uniform dispersion of water from the dispersion chamber. A pump means circulates water from the tank through the filter material in the filter box, through the dispersion chamber and back to the tank through the gravel. The flow of clean water out of the apertures in the upper wall and up through the gravel achieves biological filtration. The filter apparatus also includes a selectively adjustable bypass path for regulating the flow of water through the dispersion chamber.
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