Patent ID: 6425733
Filing Date: 2002-07-30
Classification: F02M,F04D

Abstract:
A turbine type pump, comprising:a fuel pump housing; a circular impeller body carried in the housing, constructed to rotate about an axis and having a pair of generally axially opposed faces; a pair of substantially separate fluid pumping channels defined in the housing with one fluid pumping channel adjacent to each of the axially opposed faces of the impeller body; a plurality of circumferentially spaced vanes extending from the periphery of the impeller body on each of the axially opposed faces of the impeller body with pockets between adjacent vanes and the vanes on each face of the impeller body extending into a corresponding one of the fluid pumping channels, each vane having a base portion extending essentially radially from the impeller body, and an arcuate tip extending from the base portion at an orientation such that the tip leads the base portion in the direction of rotation of the impeller body the pockets on one face do not communicate through the impeller with the pocket on the other face; and a circumferentially continuous rib of the impeller body extending to the periphery of the impeller body, separating pockets between the vanes in one face of the impeller body from pockets between the vanes in the other face of the impeller body, and disposed adjacent to a circumferentially extending portion of the housing to separate the fluid pumping channels at least along the circumferential extent of said portion of the housing.