Hilti Aktiengeschaft

Franz Bohm

Werner Kaibach

Antonius Winkeljann

A device for locking steel reinforcing or prestressing members (15) in a positive manner in an anchorage (14) includes an axially extending cylindrical anchoring sleeve (1) with a throughbore (2) and a deformation section (3) extending from a leading end in the setting direction (S) and divided by axially extending slots (4) into at least six bending elements (5). An expanding element (8) with a throughbore (9) free of threads has a contact surface (10) for the bending elements (5) and the contact surface is inclined relative to the axis A of the anchoring sleeve (1). The expanding element (8) can be displaced against the deformation section (3) for spreading the bending elements (5) radially outwardly against the receiving surface of a receiving bore in a base material forming the anchorage. The contact surface (10) forms an angle (.alpha.) with the axis (A) of the anchoring sleeve (1) in a range of approximately 30.degree. to 80.degree.. The axial length of the bending elements is dimensioned, so that the outside diameter of the leading end of the deformation section in the anchored state amounts to 140%, at a maximum, of such diameter in the unexpanded state. The securement of the anchoring sleeve (1) is achieved by a positive lock in an undercut formed in the receiving bore in the base material.

Growing community of inventors

Kaufering, Germany

Franz Bohm