Plug system comprises bolt fitting into metal sleeve with longitudinal slits and engaging with conical spreader which has outer flat surfaces cooperating with similar sections inside sleeve to lock it in place

摘要

The plug system comprises a bolt (1) which fits into a metal sleeve (2) with longitudinal slits (22) and engages with a conical spreader (3) with an internal thread (31). This has flat surfaces (32) on its outside which cooperate with similar sections (23) inside the sleeve to lock it in place.