Hilti Aktiengesellschaft

Andreas Eckstein

Marc Schaeffer

Mathias Goldt

Arjen Detmer Dijkhuis

Joerg Appl

Matthias Paetow

Remo Hutter

Jörg Appl

Marc Schäffer

A cold-worked multi-cone anchoring element for chemical fastening technology is coated. The anchoring element detaches better from an injection mortar and exhibits both improved sliding properties and increased corrosion protection.

Method for coating a cold-worked multi-cone anchoring element

An expansion bolt including an anchor bolt having an expansion section, and further including an expansion sleeve which surrounds the anchor bolt and which can be expanded by retracting the expansion section, and a spring element arranged on the anchor bolt. The spring element can be tensioned by inserting the anchor bolt into a bore hole and can retract the expansion section of the anchor bolt into the expansion sleeve when it is released. An indicator element indicates when a rated tension of the spring element is reached.

Expansion bolt

A sensor arrangement, for example, on an anchor bolt, including at least one sensor (). At least one bypass element () with a dilatant material is arranged in the area of the sensor (), whereby impact forces that act upon the sensor () can be dissipated via the dilatant material of the bypass element ().

Sensor arrangement, for example, on an anchor bolt

A direct tension indicator (), including a base element () and a cover element () that is arranged on the base element () and at least one indicator element () that is arranged between the base element () and the cover element () in order to display an axial force acting between the base element and the cover element. The indicator element () includes a dilatant material.

Growing community of inventors

Landsberg, Germany

Andreas Eckstein