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:
Jun. 26, 1990
Filed:
Mar. 22, 1989
Applicant:
Inventor:
Shozo Sakaguchi, Saitama, JP;
Assignee:
Jidosha Kiki Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16B / ;
U.S. Cl.
CPC ...
303-4 ; 9137 / ; 92 9 / ; 277152 ;
Abstract
An improved diaphragm is disclosed which partitions the interior of a shell of a brake booster into a constant pressure chamber and a variable pressure chamber. The diaphragm includes a bead which extends around its inner periphery, and which is formed with a lip extending from the side of the constant pressure chamber to the side of the variable pressure chamber. The lip is held in close contact with the outer peripheral surface of a valve body. The lip is capable of an elastic deformation in a flexible manner, whereby a good seal against the outer peripheral surface of the valve body is maintained.