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:
Sep. 07, 2010
Filed:
Dec. 14, 2005
Kazuki Takeno, Nihonmatsu, JP;
Hideyuki Huruyama, Fukushima, JP;
Masayuki Tanida, Fukushima, JP;
Hiroki Matsui, Fukushima, JP;
Tatsuhiko Watanabe, Fukushima, JP;
Shinobu Munekata, Fukushima, JP;
Akira Yamaguchi, Fukushima, JP;
Hirotaka Mizuta, Fujisawa, JP;
Kenichi Kunieda, Fujisawa, JP;
Toshihiro Higashira, Fujisawa, JP;
Kazuki Takeno, Nihonmatsu, JP;
Hideyuki Huruyama, Fukushima, JP;
Masayuki Tanida, Fukushima, JP;
Hiroki Matsui, Fukushima, JP;
Tatsuhiko Watanabe, Fukushima, JP;
Shinobu Munekata, Fukushima, JP;
Akira Yamaguchi, Fukushima, JP;
Hirotaka Mizuta, Fujisawa, JP;
Kenichi Kunieda, Fujisawa, JP;
Toshihiro Higashira, Fujisawa, JP;
NOK Corporation, , JP;
Abstract
This invention provides an oil seal that can maintain an excellent friction reduction function over a long period of time, has excellent abrasion resistance, and further has excellent sealing properties. The oil seal comprises a seal lip () formed of a rubber-like elastic material comprising a lip edge part () and an air-side slope () and a sealing fluid-side slope () provided on both sides of the lip edge part (). The air-side slope () has a coating film () on its surface. In the lip edge part () in its portion in contact with a shaft (), a sealing fluid-side rubber part (') and an air-side coating film () are simultaneously brought into contact with the shaft (). The coating film () is preferably formed of a coating agent comprising a fluororesin, a polyethylene resin, an isocyanate-modified polybutadiene resin, and a solvent.