Undercutting and spalling anchor

Abstract

The subject of the application is an undercutting-breaking anchor having a drive screw (1) with a conical end (2) on one side. On the drive screw (1) on the side of the conical end (2), a spring-expansion sleeve (3) with an internal conical undercut is mounted, and a conical nut (4) is screwed on. A conical support element (6) is attached to the conical end (2) of the drive screw (1) using two pins (5). On the other side, the drive screw (1) has an end (7) in the form of a truncated pyramid with a square base, the lateral surfaces of which are inclined at an angle of 5° to the drive screw axis.