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:
Jul. 23, 1996
Filed:
Jul. 28, 1995
Tadao Saito, Nagoya, JP;
Yasuhito Sekihara, Anjo, JP;
Hiroyuki Hattori, Toyota, JP;
Hirohisa Kuwana, Toyota, JP;
Hiroshi Toda, Toyota, JP;
Ryuji Takagaki, Toyota, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
The hydraulic brake system for a vehicle which can perform anti-lock control includes a brake circuit for connecting a master cylinder to wheel brakes, a control valve circuit for decreasing hydraulic brake pressure in the wheel brake by discharging brake fluid from the wheel brake to a reservoir, a plunger pump driven by an electric motor for returning brake fluid from the reservoir to the brake circuit and a slit formed on at least the discharge valve seat or the suction valve seat of the pump unit for evacuating the pump chamber of the plunger pump. The hydraulic brake system can further include a one-way valve which permits communication between the pressure chamber of the pump with the reservoir for evacuation.