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:
Aug. 14, 2007
Filed:
Apr. 15, 2004
Toru Noguchi, Ueda, JP;
Kazuhito Kawata, Ueda, JP;
Takashi Wanibuchi, Kitamoto, JP;
Koichi Arita, Hanyu, JP;
Toru Noguchi, Ueda, JP;
Kazuhito Kawata, Ueda, JP;
Takashi Wanibuchi, Kitamoto, JP;
Koichi Arita, Hanyu, JP;
Nissin Kogyo Co., Ltd., Ueda-shi, JP;
Fukoku Co., Ltd., Ageo-shi, JP;
Abstract
A piston seal of a disc brake can stabilize the amount of rollback of a piston by reducing thermal expansion and a decrease in modulus of elasticity of the piston seal caused by an increase in temperature, thereby preventing a driver from feeling that the brake operation is unnatural. The piston seal is formed of a rubber composition in which at least 100 parts by weight or more of carbon black is added to 100 parts by weight of ethylene propylene rubber.