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:
Aug. 09, 1994
Filed:
Jan. 21, 1993
Hideki Koyama, Okazaki, JP;
Takashi Hamaoka, Kariya, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A fuel pump includes a flow channel formed substantially along an outer periphery of an impeller. Fuel is sucked from a suction port opened to an inlet portion so as to flow from an introduction groove to a pressurizing groove. The introduction groove is formed so that a sectional lateral length of the groove gradually becomes smaller from the inlet portion toward the pressurizing groove. Further, bottom portions at the deepest portion of the introduction groove are formed to extend gradually outwardly from the suction port opened to the inlet portion. The bottom portions of the introduction groove are so formed that the depth of the introduction groove gradually becomes smaller from the suction port. With such structure, the fuel sucked from the suction port can flow smoothly so that the occurrence of the fuel vapor is restrained and the flow rate reduction of the fuel at a high temperature is prevented.