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:
Jan. 12, 1999
Filed:
Jul. 02, 1997
Akihiko Sekiguchi, Saitama, JP;
Akebono Brake Industry Co., Ltd., Tokyo, JP;
Abstract
A vehicle brake booster comprises: a body having an input port, an output port, and a flow path through which the input port is communicated with the output port; a first piston which is arranged in the flow path, and on which the hydraulic pressure in the flow path acts; a control valve which is abutted against the first piston, and defines a control chamber which is able to introduce or block the hydraulic pressure of an accumulator; a second piston which is arranged downstream of the first piston in the flow path, the second piston being in the form of a stepped piston having a large diameter portion and a small-diameter portion to the end of which the hydraulic pressure in the flow path is applied, and being able to produce a wheel cylinder pressure; a hydraulic pressure chamber formed in the large-diameter portion of the second piston; and a cut valve arranged downstream of the second piston in the flow path.