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. 21, 1982
Filed:
Jul. 23, 1980
Hiroo Takeuchi, Asashina, JP;
Nissin Kogyo Kabushiki Kaisha, Ueda, JP;
Abstract
An improved differential pressure operated servo-booster herein disclosed comprises a booster shell, a forward first fluid chamber and a rearward second fluid chamber defined by a booster piston within the booster shell and normally in communication with a vacuum source, a cylindrical valve body integrally extended at the rearward surface of the booster piston and slidably supported on the rearward side wall of the booster shell through a plain bearing, a control valve received within the cylindrical valve body to permit the second fluid chamber to selectively communicate with the first fluid chamber or atmosphere, and an input rod disposed with the cylindrical valve body and operatively connected to the control valve, the plain bearing being formed integral with the rearward side wall of the booster shell in a seamless fashion. Preferably, the booster shell and the plain bearing are integrally formed of a synthetic resin, and the cylindrical valve body is formed of a synthetic resin of higher hardness than that of the plain bearing.