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. 22, 2002
Filed:
Sep. 14, 2000
Osamu Kanazawa, Higashimatsuyama, JP;
Yoshiyasu Takasaki, Higashimatsuyama, JP;
Michio Kobayashi, Higashimatsuyama, JP;
Hiroshi Osaki, Higashimatsuyama, JP;
Hidefumi Inoue, Higashimatsuyama, JP;
Hiroyuki Oka, Higashimatsuyama, JP;
Hiroaki Niino, Kariya, JP;
Kazuya Maki, Kariya, JP;
Mamoru Sawada, Kariya, JP;
Other;
Abstract
In a brake booster of the present invention, by depression of a brake pedal an input shaft travels to the left, a pedal input converter generates thrust, and a valve element moves to the left. A valve passage is shut off from a valve passage and a valve passage is connected to a valve passage so as to develop output pressure Pr at an output port of a control valve because of the pressure of a pressure source. The output pressure Pr is supplied to a wheel cylinder thereby actuating the brake. At this point, since the displacement of the input shaft required for operating the control valve is defined only by the converter the input side is not affected by the brake rigidity of a circuit from the control valve to the wheel cylinder The output pressure Pr of the control valve acts on the valve element through a first reaction receiving portion and is regulated to pressure proportional to the thrust of the converter The second reaction force is transmitted to a driver through a second reaction receiving portion The control of the output can be conducted during the operation regardless of the input of the input side and the respective characteristics can be varied without being affected by the output side.