Patent ID: 6019570
Filing Date: 2000-02-01
Classification: F02M,F04D,F05D

Abstract:
A fuel pump comprising:a housing;a motor received within the housing;an impeller driven to rotate by the motor, having a pair of opposed faces and defining in part a pumping channel about its periphery;a first body carried by the housing adjacent one face of the impeller and having a plurality of circumferentially spaced and separate cavities formed in the first body radially inwardly of the pumping channel and in communication with the impeller;a second body carried by the housing adjacent the other face of the impeller and having a plurality of circumferentially spaced and separate cavities formed in the second body radially inwardly of the pumping channel and in communication with the impeller,the opposed faces of the first body and the second body each having said cavities of substantially the same size and location relative to the impeller,separate flow passages individually communicating each of at least two of the cavities of both the first and second body with he pumping channel, andwherein the cavities of the first body and the second body are constructed to balance the forces acting on the impeller when filed with fuel during use of the fuel pump to generally center the impeller between the first body and the second body.