Flame mitigation device for portable fuel containers
A flame mitigation device configured to be located proximate a main container opening of a fuel container having a fuel-receiving chamber, with the main container opening permitting liquid fuel to flow into and out of the fuel-receiving chamber. The flame mitigation device comprises a sidewall defining a plurality of perforations through which the liquid fuel can flow to dispense such liquid fuel from the fuel-receiving chamber when the flame mitigation device is installed within the fuel container. At least a portion of the perforations defined in the sidewall are downwardly sloping perforations, with the downward angle of the downwardly sloping perforations being at least 1 degree below horizontal. And at least 20 percent of the total open area defined by all of said perforations is attributable to downwardly sloping perforations.
1. A method for coupling a flame mitigation device to a fuel container, wherein the fuel container comprises a hollow tank body defining a fuel-receiving chamber and a main container opening for permitting flow of a liquid fuel into and out of the fuel-receiving chamber, wherein said method comprises the steps of:
providing the flame mitigation device comprising a sidewall defining a plurality of perforations through which liquid fuel flows when dispensing liquid fuel from the fuel-receiving chamber, and wherein the flame mitigation device further comprises a pair of wing elements extending outwardly from the sidewall, wherein at least a portion of the wing elements are spaced apart from an imperforate section of the sidewall; and
inserting the flame mitigation device through the main container opening of the fuel container, wherein during said inserting step, the wing elements are compressed adjacent to an outer surface of the sidewall; and
securing the flame mitigation device within the main container opening of the fuel container, wherein during said securing step, the wing elements expand away from the outer surface of the sidewall.
2. The method of claim 1 , wherein at least a portion of the perforations defined in the sidewall are downwardly sloping perforations having a downward angle of at least 1 degree below horizontal, and wherein at least 20 percent of the total open area defined by all of the perforations is attributable to downwardly sloping perforations.
3. The method of claim 1 , wherein the wing elements are configured to inhibit the flame mitigation device from being removed from the main container opening.
4. The method of claim 1 ,
wherein the fuel container includes a neck that defines the main container opening,
wherein during said inserting step, a distance between a distal end of one wing element and a distal end of an opposing wing element is less than an inner diameter of a portion the neck,
wherein during said securing step, the distance between the distal end of the one wing element and the distal end of the opposing wing element is greater than the inner diameter of the portion the neck.
5. The method of claim 1 , wherein the flame mitigation device has an upper end having an inner diameter of less than 2.5 inches.
6. The method of claim 1 , wherein the perforations are configured in a manner such that after the liquid fuel has been dispensed from the fuel container and the flame mitigation device is not submerged in liquid fuel contained within the fuel-receiving chamber, a quantity of the liquid fuel is retained in the perforations.
7. The method of claim 6 , wherein the retained quantity of the liquid fuel is held in the perforations by intermolecular forces, wherein the intermolecular forces are sufficient to retain the quantity of liquid fuel in the perforations regardless of the orientation of the flame mitigation device.