| 摘要 |
The present invention entails a method and a system for chocking at least one wheel of a gas truck to assure that the gas truck is not driven away from a loading station while one or more gas hose nozzles from a storage tank are connected to a tank carried by the gas truck. The tire chock interlock system of the present invention includes a tire chock assembly that is stationed adjacent a loading platform or station and includes a chock that is movable from an extended position where the same aligns with and chocks a wheel associated with the gas truck to a retracted position away from that particular wheel leaving the gas truck free to move from the loading station. A pair of nozzle cradles are provided adjacent the loading station. When not being used to fill the tank of a gas truck, the hose nozzles from a main storage tank rest on the cradle. The interlock system of the present invention senses the presence of both gas hose nozzles on the cradle and accordingly maintains the tire chock in a retracted position. But if either cradle is not occupied by a hose nozzle, then the interlock system is operative to move the chock to a wheel locking or chocking position with respect to the gas truck and maintains that chock in that position until both cradles have received a gas hose nozzle. This assures that the gas truck cannot be driven away from the loading station while one or more hose nozzles remain connected to the tank of the gas truck.
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