Pull=out=resistant, dismountable, composite anchoring coupler

摘要

A threaded bar (3) is coupled in a borehole of corresponding dia. in a pull-out-resistant and dismountable manner via a mortar cartridge after its hardening and finished setting step. The borehole is provided with undercuts. The threaded bar is covered in the coupling section (4) by a protective layer (5) preventing its connection to an adhesive substance (29). Pref. the undercut forming blades of a special tool are fitted to its front point, while the undercut extends in a helical shape up to the borehole bottom.