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:
Oct. 16, 2012
Filed:
Jul. 25, 2008
Takato Ogiwara, Minami-ALPS, JP;
Takayuki Kinoshita, Minami-ALPS, JP;
Takato Ogiwara, Minami-ALPS, JP;
Takayuki Kinoshita, Minami-ALPS, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a master cylinder, a supply passage for supplying operating liquid from a reservoir () to a pressure chamber () is provided in a cylinder body () coupled with the reservoir. A bypass passage () for bypassing the supply passage and connecting the reservoir and the pressure chamber is further provided, and a check valve () adapted to open when a pressure in the pressure chamber is lower than that in the reservoir is disposed in the bypass passage. A valve case () containing a valve body () of the check valve includes a valve seat () and a cylindrical wall () for slidably guiding the valve body which are integrally formed as a single member.