Patent ID: 7261093

Claim:
An evaporative emissions control system comprising a closure structured to mate with and close a fuel tank filler neck, the closure being formed to include a fuel vapor entry port, an atmospheric air entry port, and a fuel vapor-conducting passageway interconnecting the fuel vapor entry port and the atmospheric air entry port, a hydrocarbon adsorbing filter unit positioned to lie in the fuel vapor-conducting passageway to adsorb hydrocarbon material entrained in fuel vapor passing from the fuel tank filler neck into the fuel vapor-conducting passageway through the fuel vapor entry port to produce a stream of filtered vapor exiting the fuel vapor-conducting passageway through the atmospheric air entry port, and wherein the fuel vapor-conducting passageway from the fuel vapor entry port extends along a first direction, a second direction generally perpendicular to the first direction and through a passageway portion substantially filled with adsorbent material and extending along a third direction different from the first and second directions wherein fuel vapor passes from the fuel tank into the fuel vapor-conducting passageway through the fuel vapor entry port and produces a stream of filtered vapor exiting the fuel vapor-conducting passageway through the atmospheric air port.