Expanding anchor-bolt with slotted metal sleeve

摘要

The bolt has an expansion body with cone. The expansion sleeve is in inner and outer sleeve sections (3,2) one inside the other. The expansion arms on the inner sections contain recesses, and it can be shorter than the outer one, while its arms can be bent outwards and protrude beyond the forward end of the outer one. Protrusions can be provided on the outer section, forming stops for the inner one. The two sleeve sections can be of different materials.