The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 2009
Filed:
Jul. 07, 2005
Kazuya Ando, Obu, JP;
Seiji Ii, Obu, JP;
Kazuya Ando, Obu, JP;
Seiji Ii, Obu, JP;
Aisan Kogyo Kabushiki Kaisha, Obu-shi, Aichi-ken, JP;
Abstract
Fuel pump () may comprise a casing () and a substantially disc-shaped impeller () which is rotatably disposed within the casing (). A first group of concavities () may be formed in a lower face of the impeller (). A second group of concavities () may be formed in an upper face of the impeller (). A first groove () may be formed in the inner face of the casing () opposite the upper face of the impeller (). The first groove () is formed in a region opposite the first group of concavities () and extending from an upstream end to a downstream end. A second groove () may be formed in the inner face of the casing opposite the lower face of the impeller (). The second groove () is formed in a region opposite the second group of concavities () and extending from an upstream end to a downstream end. Preferably, the depth of the first and second groups of concavities and the depth of the first and second grooves are adjusted such that the flow of fuel flowing through the first group of concavities () and the first groove () is greater than the flow of fuel flowing through the second group of concavities () and the second groove ().