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:
Sep. 13, 1994
Filed:
Jun. 22, 1993
Shintaro Uyama, Saitama, JP;
Jidosha Kiki Co., Ltd., Shibuya, JP;
Abstract
A reaction disc used in a brake booster, in particular, an improvement of an air vent formed in the outer periphery of the reaction disc is disclosed. The reaction disc is provided with a circumferentially discontinous bulge on its external peripheral surface, and a discontinuity in the bulge provides an air vent passage. A burr is formed on the external peripheral surface of the reaction disc as displaced from the bulge. The bulge has a height which is chosen to be greater than the height of the burr. When a reaction disc thus constructed is fitted into a recess of a push rod, the air vent passage provides a positive venting action for the air trapped in the recess. Accordingly, no deburring operation is required during the manufacture of the reaction disc.