Filtering device for aquariums

Details Filtering device for aquariums Filtering device for aquariums

1992-09-09

1994-05-31

Silverman, Stanley S.

Liquid purification or separation

Structural installation

Closed circulating system

2104162, 119259, 119261, A01K 6304

Patent

active

053166701

ABSTRACT:
A filtering device including a lower housing engaged on a base and communicated with the base, an upper housing disposed above the lower casing, a tube communicating the base to the upper housing, a motor disposed in the upper housing for drawing the water contained in the base, and a pipe extended into the tube for supplying air into the tube and for forcing the water move upward through the tube when the motor is not energized.

REFERENCES:
patent: 3717253 (1973-02-01), Lovitz
patent: 4186093 (1980-01-01), Willinger
patent: 4753723 (1988-06-01), Willinger
patent: 4802980 (1989-02-01), Gilkey et al.
patent: 4842726 (1989-06-01), Willinger
patent: 5169520 (1992-12-01), Wang

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