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. 24, 1997
Filed:
Apr. 21, 1995
Joji Kasugai, Aichi, JP;
Yoshihiro Nagino, Aichi, JP;
Toyoda Gosei Co., Ltd., Aichi, JP;
Abstract
A fuel vapor recovery control valve device, for controlling the discharge of fuel vapor from a fuel tank having a fuel filler port, includes a housing; a first valve assembly, which is moved up and down by a diaphragm which divides the space in the housing into an upper chamber and a lower chamber; and a second valve assembly provided in the lower chamber. The diaphragm is of double operation film structure including a central node portion, and an intermediate node portion between the central node portion and its outer peripheral portion. A cylindrical partition wall, which is abutted against the central node portion of the diaphragm, divides the upper chamber into an upper inside chamber, which is communicated with a first vapor flow-in port of the housing, and an upper outside chamber, which is communicated through a signal port with the fuel filter port. Thus, the first vapor flow-in port can be sealingly closed by the diaphragm.