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:
Jan. 10, 1989
Filed:
Oct. 16, 1987
William F Woodcock, Dearborn, MI (US);
Loren H Kline, Oregon, OH (US);
Colt Industries Inc., New York, NY (US);
Abstract
An onboard fuel vapor recovery system for a motor vehicle includes a pressure responsive valve mounted directly on the vehicle fuel tank to control the flow of fuel vapor from the tank to a vapor storage canister both during normal operation of the vehicle and during a vehicle refueling operation. A pressure responsive diaphragm in the tank mounted valve opens a substantially unrestricted vapor flow passage from the head space of the tank to the canister when the head space pressure slightly exceeds atmospheric pressure. A separate passage in the tank valve equalizes pressure in the tank head space upon the withdrawal of fuel. A float valve responsive to the level of fuel within the tank seals the vapor passage from the tank head space when the tank is filled with fuel and further incorporates an emergency tank pressure relief valve operable in the event of overfilling of the tank.