| 摘要 |
A sealing device comprising a plug (1) intended to be placed in a threaded hole, or removed therefrom, respectively by screwing and unscrewing, the plug comprising :
a central body (4) provided with a screw thread, locking and unlocking means opposing spontaneous unscrewing of the plug, automatically activated by the rotation of the plug and its corresponding movement in the direction of screwing along a longitudinal axis (X), the locking and unlocking means comprising a first releasable coupling component (7) coupled for common rotation with the central body (4) and a second coupling component (8) which can be immobilized in rotation with respect to the threaded hole during screwing, wherein the second coupling component (8) has a central bore provided with a catch (39) and is mounted by an insertion of said screw thread through said bore followed by a displacement of said catch (39) into a retaining position in which said catch precludes reverse movement of said screw thread out of said bore. |
