Patent ID: 7735672

Claim:
A fuel cap assembly for a fuel tank with a filler neck, said cap comprising a lid coupled to a collar, said collar being adapted to engage the filler neck of the fuel tank, said lid including an exterior and interior side, a first fluid coupling on the exterior side of the lid, a port on the interior side of the lid in fluid communication with the first coupling, said first coupling including a releasable valve biased into a closed position when the first coupling is not engaged by a compatible mating coupling, and said releasable valve biased into an open position when the first coupling is engaged by the compatible mating coupling, and allowing fuel to flow through the compatible mating coupling and through the first fluid coupling and through the port and into the fuel tank without spillage when the first coupling is engaged by the compatible mating coupling; said fuel cap assembly further comprising an indicator assembly, said indicator assembly being attached to the lid and adapted to indicate when a full fuel level is attained.