Abstract: An efficient reverse-thrusting modular propeller combines a center hub and a set of identical and replaceable blades. Each such blade has a radially and laterally symmetrical hydrofoil cross-section but disposed along a full wave (360°) sinusoidal mean camber line. The blades all feature a very strong thicker symmetric hydrofoil cross-section at the propeller root which widens with a longer sinusoidal mean camber line wavelength, and thins in amplitude moving outward, and then the blades narrow again in shorter wavelength and thin more in diminishing amplitudes progressing toward the distal tip. Localized cupping on the leading or trailing edges is ruled-out as undesirable and counterproductive.

Abstract: A mixer impeller having high efficiency blades. The impeller may include a central hub and a plurality of blades attached to and extending radially outwardly from the hub such that leading edges thereof are inclined upwardly from trailing edges thereof.

Abstract: The invention relates to a horizontal agitator for producing a flow in a clearing basin, wherein a propeller (2) having a plurality of blades (4) is connected to a submersible motor (1) axially disposed thereto. In order to increase the efficiency of the horizontal agitator, according to the invention the propeller (2) and the submersible motor (1) are configured such that during operation of the submersible motor (1) a flow (P2) that is directed from the propeller (2) to the submersible motor (1) is produced.

Abstract: An agitator includes a hub for attachment to an agitator shaft, and at least two agitator blades which are connected to the hub and extend in a radial direction for rotation about an axis, with the agitator blade angled in relation to the axis. Each agitator blade has a free end, with a fin being provided in an area of the free end of the agitator blade and extending in a substantial parallel relationship to a direction of the axis away from the agitator shaft.

Abstract: The present invention provides component parts for a mixing assembly adapted to be used with clean in place techniques. The component parts may include an impeller assembly, an adjustable hub assembly and a steady bearing assembly. In one embodiment, the blades of the impeller assembly may be adapted to direct a portion of the water initially aimed at the top surface of the blade towards the bottom surface of the blade.