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:
Mar. 16, 1993
Filed:
Nov. 19, 1991
Ryuji Fujino, Tochigi, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
There is provided a connecting pipe 2 for communicating a fuel tank 1 and a canister 3 filled with a fuel absorbent, and a nonreturn valve 4 which is interposed in an intermediate portion of the connecting pipe 2 and is opened to allow vapor fuel to flow from the fuel tank 1 to the canister 3 only when a pressure of the fuel tank side exceeds a pressure of canister side, and there is also provided an electromagnetic switching valve 8 disposed in parallel with the nonreturn valve 4. To this electromagnetic switching valve an actuation signal is fed by a switch which operates when a fuel pump P is actuated or when a fuel filler cap is operated to open, and in response to this actuation signal the electromagnetic valve is opened to eliminate a negative pressure in the fuel tank.