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. 18, 1988
Filed:
Jan. 05, 1987
Kenichi Numata, Chiryu, JP;
Hiromi Otsuki, Anjo, JP;
Naohiko Tsuru, Okazaki, JP;
Noboru Noguchi, Toyota, JP;
Nobuyasu Nakanishi, Toyota, JP;
Nippondenso Co., Ltd., Kariya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An automotive anti-lock brake control system includes first and second directional control valves selectively shiftable between a first position in which a master cylinder communicates with first and second wheel cylinders associated with front and rear wheels, respectively, and a second position in which the first and second wheel cylinders communicate with a reservoir. A proportional valve is disposed between the master cylinder and the second directional control valve for producing a fluid pressure difference between the first and second wheel cylinders. The brake fluid stored in the reservoir is pumped by a fluid pump back to a pipe portion between the master cylinder and the proportional valve.