Liquid purification or separation – Structural installation – Closed circulating system
Patent
1987-11-09
1989-06-27
Fisher, Richard V.
Liquid purification or separation
Structural installation
Closed circulating system
210238, A01K 6304, B01D 3530
Patent
active
048427268
ABSTRACT:
A bottom aquarium filter for an aquarium tank including a substantially cylindrical container having an inwardly directed concave forward wall. A grill wall is removably coupled onto the concave forward wall and defines therewith an inlet chamber. A removable L-shaped insert member includes a substantially circular perforated platform wall and an upstanding convex partition wall. The platform wall spacedly sits on the bottom of the container and defines with the container a filtration chamber above the platform and a clear water chamber beneath the platform. The partition wall mates in opposition against a rear peripheral section of the circular wall of the container and defines therewith an air lift chamber. A removable cover mounts onto the container and includes a mouth aligned with the air lift chamber. The cover serves to retain all of the members in unitary assembly. An air tube fits into a spout projecting from the rear peripheral wall and extends into the air lift chamber terminating in an air diffuser which sits in a depressed compartment beneath the base wall of the container. The air tube can serve as a handle for lifting the filter assembly. The assembly can be easily separated for cleaning without the difficulty in reaching any portion of pre-formed compartments.
REFERENCES:
patent: 2782161 (1957-02-01), Willinger et al.
patent: 3477580 (1969-11-01), Willinger
patent: 3630367 (1971-12-01), Willinger
patent: 3720317 (1973-03-01), Willinger
patent: 3785494 (1974-01-01), Sama
patent: 4186093 (1980-01-01), Willinger
patent: 4532037 (1985-07-01), Willinger
patent: 4753723 (1988-06-01), Willinger
Evans Linda S.
Fisher Richard V.
Willinger Brothers, Inc.
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