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:
Apr. 13, 2004
Filed:
Dec. 19, 2001
Takayoshi Shinohara, Nagano, JP;
Nissin Kogyo Co., Ltd., Nagano-Ken, JP;
Abstract
In a control valve of the vacuum booster, a valve portion is fitted with a valve cylinder to be slidably contacted with an inner wall of the valve cylinder, to form within said valve cylinder, a front annular chamber closed by a front face of the valve portion when the valve portion is seated on a vacuum introduction valve seat, and a read annular chamber, to which the rear of the valve portion is faced. The front annular chamber communicates with a first port, and the rear annular chamber communicates with a second port. An input rod is moved forward to separate the valve portion from an atmosphere introduction valve seat and to seat it on the vacuum introduction valve seat. Then, the valve portion is urged in accordance with the set load of a valve spring and the pressure difference between the front and rear annular chambers.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile