Patent ID: 6123507
Filing Date: 2000-09-26
Classification: F04D

Abstract:
An impeller for a pump, comprising:a suction inlet passage, the suction inlet passage having an axis aligned with an axis of rotation of said impeller; anda first vane and a second vane each extending from said inlet passage from base ends which are spaced apart and which diverge to distal ends, said first and second vanes forming first and second expanding chambers, said inlet being open to said first expanding chamber between said base ends of said vanes, and closed to said second expanding chamber by a blocking wall between said base ends; andat least one shroud extending substantially perpendicularly to said axis of said inlet passage, said shroud overlying said first and second expanding chambers, aid shroud having a first portion being in dynamic balance about said axis of said inlet passage and a second portion arranged eccentrically of said axis to dynamically balance at least a portion of an eccentric weight of said blocking wall.