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. 30, 2004
Filed:
Feb. 19, 2002
Masakazu Machida, Saitama-ken, JP;
Yasushi Mori, Saitama-ken, JP;
Bosch Braking Systems Co., Ltd., Tokyo, JP;
Abstract
An improvement of a valve plunger used in a brake booster A valve plunger is made up of a rearwardly disposed body and an engaging member mounted on a front portion of the body When a brake pedal is quickly depressed during an emergency brake operation, the engaging member retracts rearward relative to the body whereby the axial size of the entire valve plunger is reduced, thereby increasing the opening of an atmosphere valve during the emergency brake operation as compared with a normal brake operation, allowing an output of an increased magnitude to be rapidly obtained. Thus, the invention allows an output from the brake booster to be rapidly increased in immediate response to a quick depression of a brake pedal.