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:
Nov. 05, 2013
Filed:
Dec. 14, 2006
Junichi Nakayama, Fujisawa, JP;
Nobuyuki Eguchi, Nihonmatsu, JP;
Tamio Inamura, Fujisawa, JP;
Kokichi Hamamoto, Fukushima, JP;
Hiroshi Inoue, Kariya, JP;
Junichi Nakayama, Fujisawa, JP;
Nobuyuki Eguchi, Nihonmatsu, JP;
Tamio Inamura, Fujisawa, JP;
Kokichi Hamamoto, Fukushima, JP;
Hiroshi Inoue, Kariya, JP;
NOK Corporation, , JP;
Denso Corporation, , JP;
Abstract
To cope with severe use conditions, a high-pressure fuel pump has a seal system () for separating/sealing fuel and lubricating oil, in an annular space between an axle reciprocating within the pump and a housing having the axle passing therethrough, wherein the seal system () consists of a combination of a fuel-side seal () for sealing fuel and lubricating-oil-side seal () for sealing lubricating oil, the fuel-side seal () is composed of a plastic-made seal ring () and a rubbery-elastomer-made O ring () for backup of the seal ring (), the lubricating-oil-side seal () consists of a single body of single-lip-type oil seal () having a rubbery-elastomer-made seal lip () fitted to a metal ring () and arranged toward the lubricating oil side, and a distance between the fuel-side seal () and the lubricating-oil-side seal () is set to be larger than the reciprocating distance of the axle.