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:
Sep. 23, 1997
Filed:
Feb. 15, 1996
Peter G Weissinger, Rock Falls, IL (US);
Tibor Baron, Decatur, IL (US);
Manuel D Rosas, Coleta, IL (US);
Borg-Warner Automotive, Inc., Sterling Heights, MI (US);
Abstract
A refueling valve for a motor vehicle includes an integrated control valve therein having a vent tube that has a first valve seat on one end thereof and a second valve seat on the other end thereof that cooperate respectively with a float valve and with a diaphragm controlled pressure responsive cut-off valve that is operative in accordance with a sensed pressure condition in a fuel filler pipe to control fuel venting to a charcoal canister and to prevent the escape of fuel vapors from a filler neck. The diaphragm is communicated with a pressure sensing port in the filler neck below a trap door therein that opens during refueling and is closed once the fuel nozzle is removed. The pressure sensing pot is located upstream of a venturi that produces negative pressure at the pressure sensing port and on the diaphragm member. A spring biases the cut-off valve normally closed. The diaphragm is responsive to a reduced pressure condition in the filler neck to open the cut-off valve to allow vapors to be vented from the fuel tank to the charcoal canister during refueling.