Patent ID: 6497552
Filing Date: 2002-12-24
Classification: F04D

Abstract:
A fuel pump comprising:an impeller having a plurality of blades at an outer periphery thereof, each of the adjacent blades defining a groove space; a partition wall provided in the groove space, for partitioning the groove space from a root of said blade; and a casing rotatably containing said impeller therein, said casing including an arc-shaped pump fluid passage along said blades, said casing including a fuel inlet and a fuel outlet communicating with said pump fluid passage, wherein said impeller rotates to introduce fuel into said pump fluid passage through said fuel inlet and discharge the fuel through said fuel outlet, said blade defines a front face positioned at a front side of said blade in a rotating direction of said impeller, the front face is formed in a concave with respect to a rotating frontward direction, the front face is inwardly concaved from both axial ends, and warps from the root of said blade to a radial outer end thereof to form the concave such that the concave gradually becomes smaller from the root to the radial outer end.