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:
Nov. 16, 1999
Filed:
Mar. 17, 1997
Masanobu Senda, Inazawa, JP;
Yasuhiko Ogisu, Nagoya, JP;
Toyoda Gosei Co., Ltd., Aichi-ken, JP;
Abstract
A master brake cylinder comprises a reservoir and a cylinder for generating fluid pressure. Provided in the cylinder is a sliding piston, and mounted to front and rear ends of piston are piston cups for sealing a gap between the piston and the cylinder. The piston cups comprise a substrate made of rubber and a coating layer made of diamond-like carbon and provided on an outer peripheral surface (sliding surface) of the substrate. A surface of the coating layer constitutes a sliding surface, and so a frictional resistance thereof relative to an inner peripheral surface of the cylinder, on which the coating layer slides, is made relatively low. The coating layer can easily follow deformation of the substrate and securely adheres to the substrate.