| 摘要 |
<p>An expansion anchor for anchoring in drill-holes, preferably in drill-holes having undercuts widening inwardly, comprises an expansion member having an expander cone supported at the bottom of the drill-hole, and an expansible sleeve driven onto the expander cone. The expansion member has an element for fastening or securing articles. The expansion member is punched out from sheet steel and the expander cone is rolled from a suitable flat blank. The gap provided at the outer surface of the expander cone is calibrated for closure.</p> |
