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:
Nov. 04, 2008
Filed:
May. 23, 2007
David H. Burke, Victor, NY (US);
William L. Villaire, Clio, MI (US);
Dennis P. Mcgrath, Ortonville, MI (US);
John G. Fischer, Goodrich, MI (US);
David H. Burke, Victor, NY (US);
William L. Villaire, Clio, MI (US);
Dennis P. McGrath, Ortonville, MI (US);
John G. Fischer, Goodrich, MI (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
Prior art fuel line check valves remain closed after engine off and cool down. Diurnal heating and the resultant pressure increase in the fuel line causes fuel vapor emissions through small openings in the fuel line (e.g., at the injector tips). The invention provides a check valve for a vehicle fuel line which opens in response to engine cooling and remains open while the engine is off to relieve subsequent increasing pressure in the fuel line due to diurnal heating thereof.