LOCKING DEVICE AND A LINE FITTING PROVIDED THEREWITH

摘要

The inventive device (1) is fixed to a nut (4) and comprises a coupling unit (42) insertable into a hexagonal configuration (11) of a spigot end (2) at a reduced axial distance being coupled by mutually interpenertratable gears (49, 51) with a stop unit (38) which axially sliding in a body (18) oppositely to a compression spring (36). The gears (49, 51) are symmetric and are insertable into each other with a predetermined elastic resistance by the action of compression or loosing torque. The inventive device is embodied in one piece which is mounted by assembling with the nut without effecting the spigot ends (2, 3). Said invention is used for locking a coupling in a systematic manner and makes it possible to unlock it without any preliminary voluntary operation.