Patent ID: 6162012
Filing Date: 2000-12-19
Classification: F02M,F04D

Abstract:
An electric motor lateral channel fuel pump comprising:a rotor driven to rotate by the motor and having a pair of generally opposed faces;a stator;a pumping channel between the rotor and the stator having an inlet and an outlet;a first set of vanes in the rotor constructed to generate pressure within the pumping channel to increase the pressure of fuel in the pumping channel from the inlet to the outlet;a second channel between the rotor and the stator and having an inlet and an outlet;a second set of vanes in the rotor defining pockets communicating with only one face of the rotor and constructed to generate pressure within the second channel whereby the second channel provides a force applied to the rotor which is greater adjacent the inlet of the pumping channel than adjacent the outlet of the pumping channel to at least in part balance the force across the rotor applied to the rotor by the fuel in both the pumping channel and the second channel and to reduce the frictional forces between the rotor and stator as the rotor rotates.