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. 15, 1991
Filed:
Apr. 23, 1990
Nobuaki Kayanuma, Gotenba, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Abstract
A device for treating vaporized fuel from a fuel tank of an internal combustion engine, and having a canister. The fuel tank has an inner partition wall which divides the space inside the fuel tank into a first small chamber and a second large chamber, which are separated from each other. A fuel flow is allowed at locations below the fuel levels in the first and second chambers, which are independently connected to the canister device, and a fuel filling pipe is open to the first, small chamber. A pressure control means is provided for maintaining a pressure in the second chamber higher than that in the first chamber, which is near to the atmospheric pressure, whereby fuel vapor is prevented from escaping from the first chamber during a fuel-filling operation.