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:
May. 20, 2003
Filed:
Apr. 26, 2001
Hiroyuki Oka, Higashimatsuyama, JP;
Michio Kobayashi, Higashimatsuyama, JP;
Masahiro Shimada, Higashimatsuyama, JP;
Mamoru Sawada, Kariya, JP;
Kazuya Maki, Kariya, JP;
Hiroaki Niino, Kariya, JP;
Other;
Abstract
In a braking pressure intensifying master cylinder, as an input shaft ( ) travels forwards in a braking maneuver, a control valve ( ) is actuated to develop fluid pressure according to the input in a reaction chamber ( ) and a pressurized chamber ( ). A stepped spool ( ) as a part of the control valve travels such that force produced by the fluid pressure and spring force of a spring ( ) are balanced, whereby the stepped spool ( ) can function as a travel simulator. By changing the pressure receiving areas of the stepped spool and/or changing the spring force of the spring ( ), the travel characteristic of the input shaft ( ) as the input side can be freely changed independently from the output side, without influence on a master cylinder pressure as the output side of the braking pressure intensifying a master cylinder ( ). In addition, the master cylinder pressure can be intensified when necessary with a simple structure.