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:
Mar. 11, 2008
Filed:
Jul. 25, 2003
Shinya Nakaoka, Tsukuba, JP;
Nobuyuki Eguchi, Nihonmatsu, JP;
Naohiro Jotaki, Nihonmatsu, JP;
Takaaki Yasudomi, Nihonmatsu, JP;
Shinya Nakaoka, Tsukuba, JP;
Nobuyuki Eguchi, Nihonmatsu, JP;
Naohiro Jotaki, Nihonmatsu, JP;
Takaaki Yasudomi, Nihonmatsu, JP;
NOK Corporation, Tokyo, JP;
Abstract
A seal ring which maintains a stable sealing performance over a long term is provided. In a first seal portion, linear contact portions which come into linear contact with the sidewall surface of an annular groove on the unsealed fluid side are continuously extended over the whole circumference of the seal ring from one side of a separation portion to the other side thereof, and the linear contact part provided at the convex part of the separation portion, and the linear contact part provided at the concave part of the separation portion are located at a distance in the radial direction of the seal ring.