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:
Mar. 05, 2002
Filed:
Aug. 25, 2000
Kazuo Kobayashi, Saitama-Ken, JP;
Shintaro Uyama, Saitama-Ken, JP;
Bosch Braking Systems Co., Ltd., Tokyo, JP;
Abstract
An improvement of a reaction disc and a valve plunger disposed in a booster is provided. A recess is formed in a rear end face of the reaction disc while a projection from the valve plunger is loosely fitted into the recess . When the break booster is operated, the peripheral surface and the bottom of the recess abut against the projection , and the rear end face abuts against the end face of a plunger , whereby a brake reaction is transmitted to an input shaft . When an input or a force of depressing a brake pedal is reduced during the operation, a resistance is applied to a rearward retracting movement of the valve plunger by the peripheral surface of the recess . The invention allows the hysteresis to be increased without increasing the hardness of the reaction disc