Patent ID: 6837256

Claim:
A method of shutting off flow to a fuel tank from a refueling nozzle comprising: (a) providing a filler tube on the tank for receiving the nozzle and extending a portion of the tube into the tank; (b) forming a valving chamber with a valve seat in the filler tube; (c) forming an obturator having a poppet portion and a hollow tubular portion and forming at least one flow port in the tubular portion and disposing the obturator in the valving chamber for sliding movement therein; (d) biasing said poppet against said valve seat with a force and overcoming said force and moving said poppet from said seat when fuel is discharged from said nozzle into said filler tube; (e) disposing a float in said tank and engaging and limiting movement of said poppet with downward movement of said float; and, (f) releasing said engaging with upward movement of the float and moving said poppet further from said seat and closing said at least one flow port and blocking the filler tube.