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. 17, 2008
Filed:
Mar. 01, 2006
Takato Ogiwara, Kawasaki, JP;
Kenji Sano, Kawasaki, JP;
Naganori Koshimizu, Kawasaki, JP;
Hiromi Ando, Kawasaki, JP;
Takato Ogiwara, Kawasaki, JP;
Kenji Sano, Kawasaki, JP;
Naganori Koshimizu, Kawasaki, JP;
Hiromi Ando, Kawasaki, JP;
Kabushiki Kaisha Hitachi Seisakusho, Tokyo, JP;
Abstract
A master cylinder of the invention supplies a brake fluid from a large diameter pressurizing chamberto a small diameter hydraulic chamberby opening a reverse flow checking opening and closing portionby sliding movement of a stepped pistonforwardly, that is, fast fill and when the hydraulic pressure of the large diameter pressurizing chamberrises, a control valveescapes the hydraulic pressure of the large diameter pressurizing chamberto a reservoirto gradually lower in accordance with rise of the hydraulic pressure of the small diameter hydraulic chamberthereby capable of reducing a strange feeling in a pedal feeling caused by sudden pressure release of the large diameter pressurizing chamber