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:
Oct. 27, 1981
Filed:
Oct. 17, 1979
Applicant:
Inventors:
Ryuji Ohta, Matsuyama, JP;
Michio Kobayashi, Matsuyama, JP;
Assignee:
Jidosha Kiki Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F01B / ; F16J / ;
U.S. Cl.
CPC ...
92 9 / ; 220295 ;
Abstract
A vacuum power servo booster including a disc-shaped inner shell and a cup-shaped outer shell with a diaphragm secured between the two shells. A radially opening annular groove is formed in peripheral portions of the inner shell by a first annularly bent portion bulging radially inwardly and a second annularly bent portion oriented along the axial direction of the booster. The outer shell includes rectangular recesses into which extend inwardly at the open faces.