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. 03, 2004
Filed:
Sep. 10, 2001
Masato Yoshino, Itami, JP;
Hideaki Higashimura, Itami, JP;
Makoto Nishikimi, Itami, JP;
Keita Nakano, Itami, JP;
Yoichi Miyawaki, Itami, JP;
Sumitomo Electric Industries, Ltd., Hyogo, JP;
Abstract
This invention is to provide a brake system and a brake device for use of automobiles, in which a braking energy stored in an auxiliary pressure source can be exploited effectively for a braking purpose, even if an electrical system fails. In particular, the vehicle brake system includes a proportional pressure control valve for generating braking liquid pressure by adjusting the braking energy stored in the auxiliary pressure source . Also the vehicle brake system comprises a passage transmitting the liquid pressure generated by a stroke of a brake pedal , a switching valve opening the passage in the powered condition and closing the same in the off-powered condition, and an auxiliary control portion activating the proportional pressure control valve . Even in the off-powered condition, the high pressure accumulated in the auxiliary pressure source can be used to adjust the required braking liquid pressure at the proportional pressure control valve . The switching valve cane be replaces with a relief valve and a return valve for activating the proportional pressure control valve so as to effectively utilize the high pressure of the auxiliary pressure source even in the on-powered condition.