Patent ID: 7360565

Claim:
A fuel overflow prevention device for use in combination with a fuel storage container having a fill tube and a vent tube, and an automatic shutoff fuel nozzle having a spout with a sensor port and an exit port, the fuel overflow prevention device comprising: an overflow prevention chamber, the overflow prevention chamber comprising: a. a primary fill space configured for removably receiving therein the automatic shutoff fuel nozzle; b. a fill tube interface section configured for releasable attachment to the fill tube; and c. a vent tube interface section configured for releasable attachment to the vent tube, wherein the fill tube interface section is configured to establish a flow restricting fit between the fill tube interface section and the exit port of the nozzle restrictive enough to minimize fuel flow from within the fill tube into the primary fill space, wherein the vent tube interface section is arranged to establish a fluid passageway between the fuel storage container and the primary fill space through the vent tube, and wherein the primary fill space is arranged to receive enough fluid from the vent tube to cover the sensor port to a level sufficient to trigger automatic shutoff of the nozzle.