Tank closure device for motor vehicles, has threaded stopper with multiple path thread whose thread paths overlap each other in peripheral direction, plastic tank opening with complementary thread

摘要

The tank closure device has a threaded stopper (10) with a multiple path thread (12) whose thread paths (12a-12c) overlap each other in the peripheral direction. The stopper thread can be a triple path thread. Each thread path extends over a peripheral angle of approximately 240 degrees. A tank opening (16) with a thread complementary (14) to that of the stopper is made of plastic.