Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Takato Ogiwara0
Hiromi Ando0
Kenji Sano0
Naganori Koshimizu0
Date of Patent
November 18, 2008
Patent Application Number
11368335
Date Filed
March 2, 2006
Patent Primary Examiner
Patent abstract
A master cylinder of the invention supplies a brake fluid from a large diameter pressurizing chamber 56 to a small diameter hydraulic chamber 49 by opening a reverse flow checking opening and closing portion 61 by sliding movement of a stepped piston 16 forwardly, that is, fast fill and when the hydraulic pressure of the large diameter pressurizing chamber 56 rises, a control valve 86 escapes the hydraulic pressure of the large diameter pressurizing chamber 56 to a reservoir 12 to gradually lower in accordance with rise of the hydraulic pressure of the small diameter hydraulic chamber 49, thereby capable of reducing a strange feeling in a pedal feeling caused by sudden pressure release of the large diameter pressurizing chamber 56.
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