SHUTOFF VALVE ASSEMBLY FOR A VENT PIPE

摘要

A shutoff valve assembly for a vent pipe of a tank comprising a valve and a housing is provided. The housing is adapted to retain one end of the valve while the other end is free to oscillate. The valve has a bore positioned along its longitudinal axis and is disposed in the vent pipe or the whistling vent of a tank. When the tank is in an upright position, the bore of the valve is aligned with the vent pipe opening to provide a continuous channel connecting the interior of the tank and the exterior thereof. In the event the tank is displaced from its upright position, the valve moves in response to gravity causing a misalignment of the bore of the valve and t he vent pipe opening thereby cutting off the channel and thus preventing leakage of fuel.