Patent ID: 6296439
Filing Date: 2001-10-02
Classification: F04D

Abstract:
A regenerative fuel pump for supplying fuel to an engine from a fuel tank, the pump comprising:a pump housing;a rotary pumping element in the form of an impeller within the pump housing, the impeller comprising a disc portion having an outer circumference, a first plurality of vanes circumferentially spaced about the outer circumference of the disc portion and a second plurality of vanes circumferentially spaced about the outer circumference of the disc portion, said second plurality of vanes rotationally staggered with respect to the first plurality of vanes;a partition wall formed between the first plurality and the second plurality of vanes, said partition wall extending from the outer circumference for a distance less than the length of the first and second plurality of vanes;the first plurality of vanes and said partition wall intersecting to define a first plurality of vane grooves, and said second plurality of vanes and said partition wall intersecting to form a second plurality of vane grooves;the second plurality of vanes positioned rotationally immediately adjacent the first plurality of vanes so as to cover a portion of the first plurality of vane grooves immediately adjacent the first plurality of vanes when viewed from an axial end of the impeller.