Patent ID: 6375422
Filing Date: 2002-04-23
Classification: F04D

Abstract:
A pump, comprising:a housing having an inlet and an outlet; an impeller assembly mounted for rotation within said housing, said impeller assembly, comprising: a first impeller piece having a first mating surface thereon; a second impeller piece having a second mating surface therein, the second mating surface of said second impeller piece being sized to mate with the first mating surface of said first impeller piece, the second mating surface of said second impeller piece having at least one groove therein, said second impeller piece being mounted to said first impeller piece so that the second mating surface fits against the first mating surface, the groove in the second mating surface together with the first mating surface defining at least one flow channel in said impeller assembly; and a drive system operatively associated with said impeller assembly, said drive system rotating said impeller assembly within said housing.