Patent ID: 8511351

Claim:
A fuel delivery system of an aircraft refueling vehicle that is configured to distribute fuel from a hydrant pit valve at an airport, said fuel delivery system comprising: a first hose including a coupler that is configured to be fluidly connected to a hydrant pit valve at an airport to receive fuel from the hydrant pit valve; a fuel passageway that is fluidly coupled to the first hose; an on-board fuel tank that is fluidly coupled to the fuel passageway; a second hose that is fluidly coupled to the fuel passageway, said second hose including a nozzle that is configured to be coupled to a refueling point on an aircraft to distribute fuel into a fuel tank of an aircraft; a valve coupled to the fuel passageway that is moveable between a first position and a second position, wherein, in the first position of the valve, the fuel passageway is configured to distribute fuel from the first hose to the on-board fuel tank of the aircraft refueling vehicle, and, in the second position of the valve, the fuel passageway is configured to distribute fuel from the first hose to the second hose of the aircraft refueling vehicle; a pressure regulator for regulating a fuel pressure within the fuel delivery system, wherein the pressure regulator includes an air chamber and a sgparate fuel chamber, wherein when an air pressure in the air chamber exceeds a fuel pressure in the fuel chamber of the pressure regulator, the regulator is biased to an open position, and when the fuel pressure in the fuel chamber exceeds the air pressure in the air chamber of the pressure regulator, the regulator is biased to a closed position to prevent the introduction of fuel into the first hose; a fuel pressure feedback circuit including a conduit for delivering fuel from the first hose or the fluid passageway to the fuel chamber of thepressure regulator; and a compressed air circuit including a compressed air source and a conduit for delivering compressed air from the compressed air source to the air chamber of the pressure regulator.