Hilti Aktiengesellschaft

Cord-Henrik Surberg

Markus Hartmann

Orlaw Massler

Hanspeter Schad

Erich Wisser

Bernhard Sander

Helmut Gassner

Reinhard Lins

Steven Moseley

Stefan Rosiwal

Marcel John

Joachim Vedder

Matthias Leischner

Charles Coffin

Wolfgang Seyfferth

Gerit Knall

Thomas Helmreich

Frank Moszner

Jolanta Janczak-Rusch

Lars Jeurgens

The cutting plateincludes a base bodymade of a sintered hard metal. On a top sideof the base bodythere are one or multiple intermediate layersthat include an adhesion-promoting layer. The adhesion-promoting layeris made of a boron-containing nitride of a transition metal of group IV, group V, and group VI, and contains a plurality of small platesoriented at an angle relative to the top side. A diamond layer that is grown on the adhesion-promoting layerincludes stalk-shaped crystals, oriented vertically relative to the top side, having an aspect ratio greater than three.

Cutting plate and manufacturing method

A percussion bores for forming borer in a stone material and including a chisel stem ( ) having a prismatic cross-section and provided with a chiseling head ( ) and at least one radial opening ( ), a twist drill ( ) extending through the cylindrical through-bore ( ) of the chisel stem and projecting beyond the chiseling head ( ), a drilling head ( ) with cutting elements ( ) provided at the projecting end of the twist drill and a shank ( ) provided at another end of the twist drill, and a stop ( ) provided between the shank ( ) and the chisel stem ( ), with a drill stem being offset radially inwardly with respect to an outer diameter of the shank in the region of the stop.

Percussion borer for forming bores in stone material

An axially extending expansion anchor or dowel has an anchor body (2) with a first end region to be inserted first into a borehole (B) in a receiving material (G) and a trailing second end region in which a load can be applied. The first end region has an axially extending expansion region with at least two expanding tangs (7) separated from one another by axially extending slots. The first end region has a opening (11) into which an expanding body (12) is displaceable axially for radial expansion of the tangs (17). The axially extending opening (11) has an inner axially extending surface (10) closer to the axis of the anchor body and formed by a guide pin (9) of the anchor body (2) and an outer axially extending surface formed by the inner surface of the tangs (7). The expanding body (12) is basically sleeve-like shaped and has an inner surface which bears against the inner surface (10) of the opening (11). The outer surface of the expanding body (12) is, at least in part, wedge shaped. In the radially outwardly expanded state of the tangs (7), the expanding body (11) lies substantially flat against the inner and outer surfaces of the opening (11).

Expansion anchor

Growing community of inventors

Feldkirch, Austria

Cord-Henrik Surberg