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. 26, 2013
Filed:
Jul. 20, 2007
Minoru Hashida, Hitachinaka, JP;
Hiroyuki Yamada, Hitachinaka, JP;
Junichi Shimada, Tokyo, JP;
Toru Onose, Ibaraki, JP;
Satoshi Usui, Hitachinaka, JP;
Masami Abe, Hitachi, JP;
Tohru Himoto, Mito, JP;
Minoru Hashida, Hitachinaka, JP;
Hiroyuki Yamada, Hitachinaka, JP;
Junichi Shimada, Tokyo, JP;
Toru Onose, Ibaraki, JP;
Satoshi Usui, Hitachinaka, JP;
Masami Abe, Hitachi, JP;
Tohru Himoto, Mito, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A high-pressure fuel pump is comprises of: a plunger which slidably fits to a cylinder and reciprocates for pressurizing and discharging a fuel taken in a pressurizing chamber; an inlet valve device for taking in a fuel into the pressurizing chamber; an outlet valve device for discharging the pressurized fuel from the pressurizing chamber; and a communicating pass which comprises a hole or a groove formed in the cylinder, and communicates between a pressurized fuel area and a gap between the cylinder and the plunger.