US Patent 7500820 Impeller and fuel pump using the same
Patent 7500820 was granted and assigned to Denso on March, 2009 by the United States Patent and Trademark Office.
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The outer periphery of a disc-shaped impeller is surrounded with an annular portion. Vane grooves are formed on the inner circumferential side of the annular portion on both sides in the axial direction. The vane grooves, which are adjacent to each other, are partitioned with a partition wall that is bent at the substantially center in the axial direction. The partition wall is bent to the rear side relative to the rotative direction. The vane grooves, which are formed on both sides in the axial direction, are partitioned with a wall from each other partially on the radially inner side thereof. A partition wall, which is arranged on the rear side of the vane groove relative to the rotative direction, has a fore face that is on the fore side of the partition wall relative to the rotative direction. The fore face is an inclined flat face that is inclined to the rear side relative to the rotative direction, as extending to the radially outer side.
US Patent 07500820 Impeller and fuel pump using the same US Patent 7500820 Impeller and fuel pump using the same
US Patent 07500820 Impeller and fuel pump using the same
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