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:
Apr. 26, 2005
Filed:
Apr. 01, 2003
Tomohito Ota, Yokohama, JP;
Tomihito Hashimoto, Tokyo, JP;
Yasuaki Yamamoto, Hitachi, JP;
Hiroo Kusano, Hitachi, JP;
Tomohito Ota, Yokohama, JP;
Tomihito Hashimoto, Tokyo, JP;
Yasuaki Yamamoto, Hitachi, JP;
Hiroo Kusano, Hitachi, JP;
Nissan Motor Co., Ltd., Kanagawa-ken, JP;
Hitachi Cable Ltd., Tokyo, JP;
Abstract
A seal ring seals operating oil hermetically and is attached to an annular seal ring groove provided on an outer circumference of a shaft member. The seal ring comprises fluororesin, metal powder having a hardness equal to or more than that of any of a side surface of the seal ring groove serving as a sliding partner and an inner circumferential surface of a housing engaged relatively rotatable with the outer circumference of the shaft member, and modified fluororesin formed by irradiating an ionizing radiation in a range from 1 kGy to 10 MGy inclusive in a state of being heated up to a melting point thereof or higher under an inert gas atmosphere with an oxygen partial pressure of 1.33 kPa or less.