| 摘要 |
<p>The invention relates to a metallic expansible percussion plug having an expansible cone (2) and a bolt (3), having an internal thread (5), over which is placed a slotted, expansible sleeve (1), which can be driven onto the expansible cone (2), and has as its object that the expansible sleeve (1) projects over the end face of the bolt (3) located opposite the expansible cone (2) about the path of penetration, and that this position is fixed by a projection, prolongation or such like (10, 12, 13) arranged on the bolt (3) or on the expansible sleeve (1), a resistance which can be overcome when the expansible sleeve (1) is struck onto the expansible cone (2) of the bolt (3) opposing the displacement of both parts. <IMAGE></p> |
