Expansion dowel used in hard objects such as concrete, has sleeve whose ends are provided with stepped slopes on which similar segment wedge is made to slide, when dowel sleeve opens in swiveling-shape

摘要

The expansion dowel has a similar segment wedge (5) which is provided over the entire length of the sleeve (1), and comprises constant pressure on borehole wall. The ends (3,4) of the sleeve comprise stepped slope (9), on which the wedge is made to slide when the dowel sleeve opens in swiveling-shape.