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:
May. 29, 2012
Filed:
May. 19, 2006
Takeshi Furukido, Fujisawa, JP;
Toshihiko Shimura, Fujisawa, JP;
Tomoyuki Inagaki, Fujisawa, JP;
Masao Tomomatsu, Nakatsu, JP;
Takeshi Furukido, Fujisawa, JP;
Toshihiko Shimura, Fujisawa, JP;
Tomoyuki Inagaki, Fujisawa, JP;
Masao Tomomatsu, Nakatsu, JP;
Oiles Corporation, Tokyo, JP;
Abstract
A spherical annular seal member includes a spherical annular base member defined by a cylindrical inner surface, a partially convex spherical outer surface, and large- and small-diameter-side annular end faces and of the partially convex spherical outer surface, as well as an expandable annular coating layer formed integrally on the cylindrical inner surface of the spherical annular base member. The coating layer consists of a mixture of acid-treated graphite and wax.