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Check valve for use in filler tube vapor recirculation system and method of making same

  • US 6,945,290 B1
  • Filed: 06/10/2004
  • Issued: 09/20/2005
  • Est. Priority Date: 06/10/2004
  • Status: Expired due to Fees
First Claim
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1. A fuel tank filler tube assembly for use in a tank fill system employing fuel vapor recirculation comprising:

  • (a) a tubular member with an enlarged diameter end for receiving a refueling nozzle and having a vapor recirculation cut-out formed in the wall of said enlarged end;

    (b) a flapper formed of flexible material associated with said cut-out and moveable therein for opening and for closing said port; and

    ,(c) means positioning said flapper for closing said cut-out wherein said flapper upon being contacted by liquid fuel rising in the tubular member, in the closed position substantially prevents passage of liquid fuel from said tube permits fuel vapor flow into said tube.

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