Gas and liquid contact apparatus – Fluid distribution – Pumping
Patent
1977-08-01
1978-09-26
Chiesa, Richard L.
Gas and liquid contact apparatus
Fluid distribution
Pumping
210169, 210221P, 261 84, 261 93, 261121M, B01F 304
Patent
active
041170440
ABSTRACT:
An aerator in which air is forced into the liquid by means of a helical rib surrounding a cylindrical member which is rotated in such a direction that air trapped beneath the helical rib is forced downwardly into the liquid. A diffuser at the bottom of the helical rib is effective to break up the trapped air bubbles into finer bubbles which are dispersed through and retained by the liquid. The cylindrical member on which the helical rib is disposed may be rotated by an electric motor which may be disposed either above the water line or beneath the water line at the bottom of the helical rib. Where necessary, air may be pumped into the space above the water so as to facilitate the introduction of air about the helical rib. Where the aerator is to be used with a container of limited size, the aerator may be either mounted on the cover of the container or may have associated therewith a closure member adapted to fit into the neck of such a container. Where the device is to be used for aerating a large body of water, it may be provided with buoyant material so as to cause the aerator to float on the surface of the water. The buoyant material may be housed in an inverted dome and the motor may be housed in this dome. A shroud may surround the helical rib for a distance into the water to minimize the tendency of air above the water, as distinguished from fresh air, to be drawn in by the helical member as it is rotated.
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Durda Stanley J.
Gustafson Walter D.
Chiesa Richard L.
Lange Frederick E.
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