Hilti Aktiengesellschaft

Hilti Aktiengsellschaft

Falk Rosenkranz

Franz Popp

Bernhard Winkler

Peter Gstach

Christoph Hakenholt

Bernhard Sander

Fritz Hermann

Harald Schmitzer

Corinna Achleitner

Georg Oberndorfer

Michael Beckert

Holger Basche

Ralf Zitzmann

Isaiah Freerksen

Simon Martin

Juergen Boeckle

Gabriel Schierscher

Pietro Bianchi

Thomas Brunhuber

Martin Turski

Stefan Unverzagt

Marc Schäffer

Rosa Maria Gonzales

Rosa Maria Gonzalez

An anchor () that can be secured in a drilled hole (), with an expansion sleeve () for anchoring onto a wall of the drilled hole, and with an anchor bolt () that passes through the expansion sleeve and that has an expansion section () for widening the expansion sleeve, and it also has a sleeve stop () that limits axial movement of the expansion sleeve away from the expansion section () is provided. At least one rotary catch () is provided which non-rotatably couples the expansion sleeve () to the anchor bolt (), and the expansion sleeve has at least one external thread helix () for creating an undercut in the wall of the drilled hole.

Anchor with an expansion section and a cutting thread

In the case of a screw having at least one thread () that is formed by a rolling process, especially a flat-die rolling process, whereby the thread () consists of two ridges of material () which are shaped from a blank () by means of cold-forming during the rolling process in such a way that the thread has a closing crease () where the ridges of material () meet each other, it is provided that the closing crease () is situated in the area of a flank () of the thread ().

Screw method for forming a screw thread

A self-tapping screw is disclosed. The screw includes a shaft which has a first end and an opposing second end with a load-engaging structure, and a thread that extends at least in sections over the length of the shaft. Several wear indicators are provided on the thread. Identifiers are provided on the screw for identifying the wear indicators.

Self-tapping screw

A fastening element for mineral constructional components has a shaft () provided with a tapping thread () extending, at least regionwise, along the shaft (), and a coating () that covers the shaft () likewise at least regionwise and that is formed of a polar thermoplast.

Fastening element

Growing community of inventors

Wildhaus, Switzerland

Falk Rosenkranz