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:
May. 21, 2002
Filed:
Mar. 09, 2001
Masaki Oishi, Toyota, JP;
Hideki Yamamoto, Handa, JP;
Takashi Kurokawa, Aichi, JP;
Michiharu Nishii, Toyota, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A hydraulic pressure brake apparatus which smoothly adds the assistance force of a hydraulic pressure booster to a master cylinder piston after the assistance limitation by a negative pressure booster includes a negative pressure booster that assists a master cylinder piston, a hydraulic pressure booster that assists the master cylinder piston by outputting the hydraulic pressure of a hydraulic pressure pump after the assistance limitation of the negative pressure booster, and a valve mechanism that controls the assistance by the hydraulic pressure booster. A single reaction member in the form of a reaction force rubber disc is provided between the master cylinder piston and the hydraulic pressure booster to transmit the reaction force to a brake pedal via the reaction force rubber disc.