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:
May. 31, 1988
Filed:
Mar. 09, 1987
Carl H Sherwood, Brockport, NY (US);
General Motors Corporation, Detroit, MI (US);
Abstract
In a vehicle fuel system having a fuel tank with a filler pipe having an upper end closable by a removable cap and opening to the atmosphere when the cap is removed to receive an inserted object and a fuel vapor storage canister, a venting means that allows the cap to be removed while preventing pressurized fuel vapors generated in the tank when the filler pipe is closed from reaching the atmosphere. When the cap is removed, a valve is opened, while a seal means independent of the cap remains closed. Thus, vapors are blocked from the atmosphere, but allowed to exit past the valve to the canister. In addition, the seal means engages a conventionally sized fuel nozzle, providing another seal so that fuel fill vapors are similarly controlled.