Abstract: Apparatus for the mixing of liquids within a vessel which utilizes at least one pump in fluidic communication with the liquid in the vessel to create a streamflow of the liquid into a draft tube disposed within the vessel. Pumps are positioned with respect to the draft tube to direct primary streamflows of liquid through the wall of the draft tube to thereby induce an additional flow of liquid through the inlet of the draft tube. The primary streamflows intersect within the draft tube intermediate the ends thereof and both the primary and streamflows pass to an outlet and of the draft induced tube thereby to create continuous circulation of the liquid within the vessel when the pumps are actuated. In alternative embodiments, the pumps may be offset to produce a helical streamflow within the draft tube. The draft tube also may be divided into two or more sections whereby additional inlets or outlets may be provided intermediate the ends of the tube.

Abstract: A pump impeller especially useful for moving heavy sediment and debris includes a drive plate having a series of blades mounted on one side thereof and radially extending from the center of the drive plate. Each of the blades is provided with a material retainer secured to the leading edge of the blade in the form of a winglet. The winglet forces the sediment and debris outwardly to be driven by the leading edge and across the tip of the blade. Each of the top or inlet edges of the blades is sharpened to cut weeds or debris which may then be pumped with the sediment.