Patent ID: 6079280
Filing Date: 2000-06-27
Classification: G01F

Abstract:
An impeller comprising:a plurality of substantially semi-circular blade portions each defining a generally planar surface disposed substantially perpendicular to a flow path to allow the impeller to be rotated;a cylindrical hub portion having two ends each having an opening, the openings defining a longitudinal passage within the hub portion;an anti-friction bearing means, positioned within the hub portion, the bearing means acting as a radial bearing for rotation of the impeller and as a thrust bearing against a wall of an impeller housing;an axle for rotatably mounting the impeller to the impeller housing, the axle being rotatably enclosed by the anti-friction bearing means; anda plurality of stem portions extending outward from a circumference of the hub portion and spaced apart at an equal distance with respect to each other wherein each of the stem portions connect the hub portion to one of the blade portions.