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:
Jun. 20, 2006
Filed:
Mar. 25, 2004
Yoshihiko Honda, Obu, JP;
Kazumichi Hanai, Obu, JP;
Yoshihiko Honda, Obu, JP;
Kazumichi Hanai, Obu, JP;
Aisan Kogyo Kabushiki Kaisha, Obu, JP;
Abstract
A fuel pump prevents pressurized fuel from being pulled into a clearance between an outer circumference face of an impeller and an inner circumference face of a pump case, thereby allowing the delivery of the pressurized fuel from a pump body side to a pump cover side through through-holes of the impeller. Since a clearance Cbetween an impeller outer circumference faceand a pump cover inner circumference faceis made extremely small, the pressurized fuel is caused to pass via through-holesthat communicate between an upper and an lower side of an impeller. By this means, it is difficult for the pressurized fuel to enter the clearance C, and it is possible to prevent the decrease in pump efficiency caused by pressure at the impeller outer circumference faceand the vicinity thereof.