Dowel with a dowel sleeve

摘要

An object is held by an anchorage point which consists of a plug inserted in a pre-drilled hole in e.g. a wall. The plug is a basically cylindrical tipped (3) tube made up of a series of large diameter (5) and smaller diameter (6) sections. Each section (5,6) incorporates a ring of rectangular apertures (7), each part- covered by a flap (4) whose outer edge is directed away from the plug tip (3). The plug is inserted in a pre-drilled hole, and a semi-fluid anchorage mass is injected under pressure into the plug, emerging through the apertures (7) to fill the space between the plug and the surrounding drilled material.