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:
Feb. 04, 2003
Filed:
Apr. 09, 2001
Hiroyuki Oka, Saitama, JP;
Michio Kobayashi, Saitama, JP;
Hidefumi Inoue, Saitama, JP;
Yoshiyasu Takasaki, Saitama, JP;
Isao Kobayashi, Saitama, JP;
Masahiro Shimada, Saitama, JP;
Mamoru Sawada, Aichi, JP;
Yuzo Imoto, Aichi, JP;
Other;
Abstract
A hydraulic-pressure counter-force mechanism which produces a counter force when a brake booster is operated is made up of an input-side member slidable disposed within a valve body , a second constant-pressure chamber formed on the rear side of the input-side member and into which a pressure is introduced from a constant pressure chamber A, and a second constant-pressure chamber formed on the front side of the input-side member and into which a pressure is introduced from a variable pressure chamber B. The counter force from the hydraulic-pressure counter-force mechanism is reduced by an orifice passage as counter-force reducing means in rapid operation for brake.