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:
Feb. 19, 2019
Filed:
Jun. 12, 2015
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Chiharu Nakazawa, Kawasaki, JP;
Ryohei Maruo, Kawasaki, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
A brake apparatus includes a brake operation member, a state detection unit, a cylinder, a first portion, an operation rod, a stepped piston, first, second, and third seal members, first and second pressure chambers, a hydraulic source, and first and second oil passages. The brake apparatus also includes a fluid amount control unit. The fluid amount control unit is configured to control an amount of the brake fluid to be supplied to the first pressure chamber and the second pressure chamber. The fluid amount control unit is also configured to increase the amount of the brake fluid to be supplied to the second pressure chamber when the detected state is equal to a preset pressure increase request.