Abstract: A dowel assembly to be anchored in a borehole in a receiving material includes a container positioned around the axis of the borehole and located between an abutment at one end of the dowel assembly and the receiving material into which the assembly is inserted. The container is formed of two parts with one part being telescopically displaceable into the other. An hydraulic mass capable of expanding when mixed with a reaction liquid is filled into the container. The expandable hydraulic mass maintains the force acting on the dowel assembly when there is relaxation of the force originally generated between the dowel assembly and the receiving material. The container has openings through which the reaction liquid can pass into contact with the hydraulic mass. The hydraulic mass can be activated by immersing the container in water.

Abstract: An expansion dowel consists of an axially elongated sleeve having a bore therethrough with an expansion body being displaceable through the bore for expanding at least an axially extending part of the sleeve. The expansion body has an annular shaped constriction in its rear portion so that the expansion body can be deformed in the region of the constriction after the expanding forces have reached a certain value.