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:
Apr. 30, 1991
Filed:
Jan. 19, 1990
Applicant:
Inventors:
Shigeru Yoshida, Obu, JP;
Yoshimasa Ito, Obu, JP;
Assignee:
Aisan Kogyo Kabushiki Kaisha, Obu, JP;
Primary Examiner:
Int. Cl.
CPC ...
F04D / ;
U.S. Cl.
CPC ...
415 551 ; 415 555 ;
Abstract
A fuel pump including an impeller having a plurality of vanes at an outer circumference thereof and a well member surrounding the vanes and formed with a fuel grooves to define a pump chamber, wherein a portion of an edge of the fuel groove intersecting the vanes is chamfered. Accordingly, it is possible to reduce an impeller noise caused by the sudden shearing of the fuel flow in the pump chamber when the vanes of the impeller cross the edge of the fuel groove, thereby greatly improving the silentness in an automobile compartment.