Expansion dowel assembly with an expansion cone displaceable into an expansion sleeve

Abstract From the Canadian patent

An expansion dowel assembly includes an axially extending anchor bolt and an expansion sleeve laterally enclosing the bolt. At its leading end the anchor bolt has an expansion cone displaceable opposite to the insertion direction of the dowel assembly relative to a conically-shaped expansion region at the leading end of the sleeve. Initially the cone angle of the expansion cone is larger than the cone angle of the expansion region of the sleeve. A circumferentially extending annular bead is located on the outer circumferential periphery of the expansion region. The expansion region is slotted in the axial direction and its wall thickness decreases in the circumferential direction toward the …