Gas and liquid contact apparatus – Contact devices – Liquid tank
Patent
1990-07-26
1991-07-23
Swiatek, Robert P.
Gas and liquid contact apparatus
Contact devices
Liquid tank
119 5, C10J 108, A01K 6300
Patent
active
050341650
ABSTRACT:
An air stone suitable for use in aerating water in an aquarium is formed of a body of porous material permeable to air. Included within the body is a central chamber having an inlet port for receiving a connector, the chamber extending beyond the port to form a plenum for distribution of air throughout the air stone. In an embodiment of the air stone constructed with a circular cylindrical configuration, the plenum is enclosed by a cylindrical wall of porous material and closed off by an end wall of porous material. The cylindrical wall has uniform thickness equal to the thickness of the end wall. The connector includes a nipple extending into the chamber to make a press fit for securing the stone to the connector. A similar nipple directed in the opposite direction secures the connector to an air-supply tube. The uniform distribution of air within the stone provides for a uniform distribution of bubbles formed throughout the outer surface of the stone, which distribution of bubbles is useful for conveying water through a lift tube in an aquarium. A spider formed of a plurality of radially extending arms may be formed on the connector to center the air stone within the lift tube.
REFERENCES:
patent: 2786026 (1957-03-01), Stark
patent: 3261471 (1966-07-01), Halpert
patent: 3529574 (1970-09-01), Kelley et al.
patent: 3616919 (1971-11-01), Feddern et al.
patent: 3746169 (1973-07-01), Willinger et al.
patent: 4192255 (1980-03-01), Willinger
patent: 4385989 (1983-05-01), Margolis
Wang Chen-Chiao
Willinger Allan H.
Manahan Todd #E.
Swiatek Robert P.
Willinger Brothers, Inc.
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