Hilti Aktiengesellschaft

Arjen Detmer Dijkhuis

Marc Schaeffer

Joerg Appl

Mathias Goldt

Andreas Eckstein

Michael Ziltener

Patrick Scholz

Karl Haeussler

Matthias Paetow

Robert Meier

Peter Rickers

Marc Schäffer

Jörg Appl

A disassembly method for an anchor that is anchored in a hole and that has an anchor bolt is provided, whereby, during the disassembly procedure, a torque is applied to the bolt of the anchor that is anchored in the hole and, in this process, the anchor bolt is stressed until it breaks. An anchor which has a head and whose bolt has an engaging profile so that a torque can be applied to the anchor bolt is also provided.

Expansion anchor and method for disassembling an expansion anchor

An expansion anchor including a bolt and an expansion sleeve surrounding the bolt is provided, the bolt having: an expansion cone in the region of the front end of the bolt, which expansion cone radially enlarges the expansion sleeve when moved into same; a threaded section for introducing tensile forces into the bolt; a shoulder that limits a movement of the expansion sleeve away from the expansion cone; and at least one anti-rotation protrusion for inhibiting a rotation of the expansion sleeve in relation to the bolt, the protrusion originating at the shoulder and protruding radially outwards on the bolt. The axial length of the anti-rotation protrusion is smaller than the pitch of the threaded section arranged on the bolt.

Handheld power tool

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

Feldkirch, Austria

Arjen Detmer Dijkhuis