| 摘要 |
<p>The anchor has a hollow shaft (10) with an external thread formed on a spiral (15) that is separated from the shaft, where the spiral is connected with an outer circumference of the shaft in a positively engaged manner. The shaft is formed from a piece of pipe, where a plastic pin is pressed into the piece of pipe. The shaft is made of construction steel or corrosion-resistant steel. The spiral is made of hardenable steel with high carbon content. The spiral includes a toothed gate area (16) made of hardenable steel, and a toothless support area (17) made of corrosion-resistant spring steel.</p> |
