Patent ID: 8007226
Filing Date: 2011-08-30
Classification: F02M,F04D,F05B

Abstract:
1. A fuel pump comprising; a rotatable impeller having a plurality of blades and blade ditches on the periphery thereof; a motor section for driving the impeller; and a casing member which accommodates the impeller and has at least one fuel passage along an outer periphery of the impeller; wherein: the fuel passage communicates with the blade ditches; a distance along an inner surface from a centerline at a bottom of the fuel passage to a radially inside edge of the fuel passage, with respect to an axis of rotation of the impeller, is shorter than a distance from said centerline to a radially outside edge of the opening of the fuel passage, diametrically opposite said inside edge; two fuel passages are provided, one disposed axially on each side of the impeller; an outside diameter D of the impeller and a thickness t of the impeller are set to satisfy the condition expression that the value of D/t is equal to or less than 8.4; and distances L