Fuel pump
AssigneeAisan Kogyo Kabushiki Kaisha
InventorsYoshihiro Takami, Kenzo Nagasaka
Life of this patent
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Abstract
A fuel pump improved in pump efficiency is provided. An impeller rotating in a pump casing has an approximately disk-shaped configuration with a group of recesses formed in a region extending along the outer peripheries of the obverse and reverse sides of the impeller. The recesses are repeatedly arranged in the circumferential direction at a distance between each pair of adjacent recesses. The radially outer end face of each recess slantingly extends radially outward from a middle plane in the direction of thickness toward the obverse and reverse sides. With this fuel pump, the incidence of separation or vortex formation in the flow of fuel is minimized, and a high pump efficiency can be obtained.
Claims14
A fuel pump having an impeller rotating in a pump casing, said impeller having an approximately disk-shaped configuration with a group of recesses formed in a region extending along outer peripheries of obverse and reverse sides of said impeller, said recesses being repeatedly arranged in a circumferential direction with a partition provided between each pair of adjacent recesses,
- wherein a radially outer end face of each of said recesses slantingly extends radially outward from a middle plane in a direction of thickness toward the obverse and reverse sides.
Dependencies are inferred from the claim text.