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:
Aug. 20, 2002
Filed:
Sep. 20, 2000
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A hydraulic pressure brake device is provided with a vacuum boosting device performing a boosting operation and a hydraulic boosting device performing a hydraulic boosting operation. The hydraulic pressure brake device includes a valve device that prohibits the hydraulic boosting operation for the master cylinder piston by the hydraulic boosting device until the vacuum boosting device reaches its boosting limit and allows the hydraulic boosting operation for the master cylinder piston by the hydraulic boosting device when the vacuum boosting device exceeds its boosting limit. A detecting sensor detects the operational condition of the vacuum boosting device and/or the operational condition of the brake pedal. Based on the detected output by the detecting sensor, a pump device for supplying the boosting pressure by the hydraulic boosting device is controlled to be driven.