Patent ID: 6394423
Filing Date: 2002-05-28
Classification: B01F

Abstract:
An aerator device for aerating the water supply of aquatic organisms, said device comprising:a first centrifugal pump for pumping fluids, said pump comprising; (a) a first impeller having an inlet edge, an outlet edge, and vanes; (b) a second impeller having an inlet edge, an outlet edge, and vanes; (c) a pump casing having a flat bottom portion, at least one pump water inlet, one pump air inlet, and one pump water outlet; wherein said first and second impellers are disposed between said pump water inlet and outlet, wherein said pump air inlet is positioned between said first impeller outlet edge and said second impeller outlet edge, and is in communication with air, and wherein said water inlet and outlet are in communication with water; and wherein said flat bottom portion of said pump casing and a top impeller plate define axial flow direction boundaries of said first and second impellers, the axial flow direction boundaries define a channel through which impeller vanes urge water to facilitate low pressure that creates a venturi to cause suction at the pump air inlet.