Patent ID: 6464471
Filing Date: 2002-10-15
Classification: F04D

Abstract:
A motor/pump assembly, comprising:a motor assembly having a front housing and a rear housing and a motor retained therebetween; said motor having a shaft mounted for rotation about an axis; a pump connected to said motor assembly at the front end thereof for pumping a fluid therethrough; said rear housing having circumferentially spaced air flow channels therein for directing an air flow in the forward direction toward the pump over at least an exterior surface of said motor, said rear housing defined by an outer cylindrical shell and a smaller diameter inner cylindrical shell with a plurality of struts connecting the inner and outer cylindrical shells, the air flow channels defined between the inner and outer shells; and a fan mounted on said shaft for rotation therewith for moving ambient air through the channels of said rear housing in the forward direction toward the pump and over the exterior surface of said motor to effect cooling thereof.