| 摘要 |
The central sealing-pin closure proposed comprises a fixed element (2) and a loosely fitting element (3) and has, in addition to a threaded closure (15, 16), both a longitudinal stop (12) and a rotational stop (19). This makes assembly particularly simple, with the possibility of defining several pre-assembly or intermediate states while still having a rotational stop which, when the closure is in use, forms a block to rotation in both directions, both at the completely open and the completely closed position. In addition, the sealing function produced ensures no backflow of liquid into the thread zone. |
