Fischerwerke Artur Fischer Gmbh & Co Kg

Igv Institut Für Getreideverarbeitung Gmbh

Hartmut Hoppe

Harald Rust

Burkhard Mayer

Jürgen Volk

Peik Steffen Schauermann

Jürgen Josef Schöber

Thomas Kretschmer

Christoph Thormann

The invention relates to an expansible anchor ( ) for fastening to a panel-shaped building material, having an anchor sleeve ( ) with forwardly projecting expansion tongues ( ) that can be spread open by drawing in an expander body ( ) having an expander cone ( ). The invention proposes to form the expansible anchor ( ) with a locking connection ( ) which locks the expander body ( ) on the expansible anchor ( ) in a position in which the expander body ( ) is drawn in between the expansion tongues ( ) and holds the expansion tongues ( ) in a spread-open position. The invention has the advantage that the expander body ( ) remains in its position in which it is drawn in between the expansion tongues ( ) and holds the expansion tongues in a spread-open position even when an expander screw is unscrewed from the expansible anchor ( ).

Expansion anchor which can be fixed to a panel-type building material

A drilling device for producing drilled holes with an undercut has a drill bit having a drilling head, a depth stop, an enlargement provided between the the drilling head and the depth stop and acting as a swivel bearing, a suction bell rotatably mounted on the depth stop, a bearing washer, and a resilient, ring-shaped cushioning element provided on the depth stop. The cushioning element abuts against the bearing washer and is connected to the suction bell. The depth stop of the drill shank has a concavely curved end face and the bearing washer has a convexly curved sliding face which rests on the concavely curved end face of the depth stop.

Drilling device for producing drilled holes with undercuts

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Horb, Germany

Hartmut Hoppe