| 摘要 |
<p>The innovation regards a safety union with an opening cursor which prevents accidental insertions of petrol in tanks of vehicles feeded with diesel oil.</p><p>Such union is characterized by the fact that its construction previews an entrance hole, an opening cursor, and an exit hole delimited from one mobile safety door; the entrance hole, at last in one point, has an inferior diameter than the one of the petrol gun device for the forced recovery of vapors. The distance between the entrance hole and the exit hole of the safety union, is greater than the distance between the mentioned device and the exit mouth of the petrol gun; with the help of the safety door attacted to the edge of the exit hole it prevents the petrol to penetrate into the tank of the diesel oil feeded cars. In fact, only with a diesel oil, on which has been opportunely installed a bush, it is possible to push a mobile cursor, that, at turn, opens the safety door, allowing the liquid to flow inside the diesel oil tank of the car.
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