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:
Dec. 13, 2005
Filed:
Jul. 14, 2004
Yoshikazu Yamada, Saitama, JP;
Eiichi Utsugi, Saitama, JP;
Shosaku Chiba, Saitama, JP;
Tsutomu Sasaki, Miyagi, JP;
Katsuhiko Tsutsui, Miyagi, JP;
Yoshikazu Yamada, Saitama, JP;
Eiichi Utsugi, Saitama, JP;
Shosaku Chiba, Saitama, JP;
Tsutomu Sasaki, Miyagi, JP;
Katsuhiko Tsutsui, Miyagi, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Keihin Corporation, Tokyo, JP;
Abstract
A composite control valve is constructed by a valve housing, first and second diaphragms mounted to the valve housing and disposed to be opposed to each other, a negative pressure working chamber defined between the first and second diaphragms to communicate with a negative pressure generating section in an engine, a first control valve adapted to be opened and closed by advancing and returning of the first diaphragm, and a second control valve adapted to be opened and closed by advancing and returning of the second diaphragm. The first control valve is incorporated into an air vent system for a fuel tank, and the second control valve is incorporated into a fuel passage system extending from the fuel tank to a fuel supply section in the engine. Thus, upon stoppage of the operation of the engine, not only the fuel passage system but also the air vent system leading to the upper space in the fuel tank are blocked simultaneously, thereby preventing release of an evaporated fuel generated in the fuel tank to the atmosphere.