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:
Feb. 28, 2012
Filed:
Sep. 03, 2008
Kenichi Tomomatsu, Kariya, JP;
Tadashi Hazama, Chita-gun, JP;
Eiji Iwanari, Chiryu, JP;
Yuuji Nakazu, Kariya, JP;
Hiromi Sakai, Nukata-gun, JP;
Kenichi Tomomatsu, Kariya, JP;
Tadashi Hazama, Chita-gun, JP;
Eiji Iwanari, Chiryu, JP;
Yuuji Nakazu, Kariya, JP;
Hiromi Sakai, Nukata-gun, JP;
Denso Corporation, Kariya, JP;
Abstract
A fuel pump has substantially coaxial outer and inner pump chambers. An impeller has partition walls correspondingly to the inner pump chamber to define inner vane grooves. A rear surface is located at a rear side in a rotative direction of each inner vane groove. At least a radially inner side of the rear surface inclines rearward in the rotative direction from the radially inner side to a radially outer side. A first line connects a radially inner end of the rear surface with a radially outer end of the rear surface. A second line radially extends from the radially inner end of the rear surface. The first line and the second line therebetween define a backward tilt angle α, which satisfies a relationship of 30°≦α≦80°.