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:
Dec. 26, 2006
Filed:
May. 21, 2003
Masami Abe, Hitachi, JP;
Hiroyuki Yamada, Hitachinaka, JP;
Toru Onose, Higashiibaraki, JP;
Atsuji Saito, Hitachinaka, JP;
Satoshi Usui, Hitachinaka, JP;
Masayoshi Kotaki, Hitachinaka, JP;
Hiroshi Odakura, Hitachiota, JP;
Masami Abe, Hitachi, JP;
Hiroyuki Yamada, Hitachinaka, JP;
Toru Onose, Higashiibaraki, JP;
Atsuji Saito, Hitachinaka, JP;
Satoshi Usui, Hitachinaka, JP;
Masayoshi Kotaki, Hitachinaka, JP;
Hiroshi Odakura, Hitachiota, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Car Engineering Co., Ltd., Hitachinaka, JP;
Abstract
A simple structured high-pressure fuel pump. A fuel pump comprises a reciprocably-supported cylinder, a pressurizing chamber using part of the outer surface of the cylinder as the wall surface which move to change the internal volume, a fuel intake passage forming a fuel passage which introduces fuel to the pressurizing chamber, a fuel discharge passage for the compressed fuel coming out from the pressurizing chamber. A fuel intake valve is provided in fuel intake passage. A fuel discharge valve is provided in said fuel discharge passage. A connecting passage connects upstream side of the intake valve in the fuel intake passage and the downstream side of it. A check valve which flows fuel from the fuel discharge flow passage to the fuel intake passage is provided in the connecting passage.