| 摘要 |
<p>The sleeve is for support material. It includes a collar (3) for bearing on the support (41) and anchoring tabs (5, 6) which can be expanded under the action of an internal tapped expansion core (21) between the tabs (5, 6). The core is arranged to be moved away from the collar under the action of an indirect expansion element and to provide at least the expansion of an intermediate zone of the sleeve in a solid material. It may be brought closer to the collar (3) under the action of an expansion screw (44), translationally immobilised, provide the progressive expansion of the sleeve in a hollow material and lock the sleeve (1) against the internal face (46) of the support (41). <IMAGE></p> |
