Patents Assigned to Ceratizit S.A.
  • Percussion or hammer drill
    Patent number: 7314102
    Abstract: A percussion or hammer drill is provided including a drill plate arranged in the head end of a drill shaft, extending completely across the diameter of the drill shaft and comprising an open front face. Wedge-shaped cutting edges and flanks form two main cutters on the front face, whereby a plane running through the drill axis forms a mid-plane-of both main cutters. The main cutters form a tip angle in the range of approximately 140° to 180° and are separated by a central point.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: January 1, 2008
    Assignee: Ceratizit S.A.
    Inventor: Michael Magin
  • Method for Dispersing and Passivating Particulate Powders in Water and Aqueous Media
    Publication number: 20070259970
    Abstract: The invention relates to a method for dispersing and passivating particulate powders in water and aqueous media. It is particularly advantageously applicable in the handling and processing of non-oxidic powders, e.g., in the ceramic and hard-metal industry. In the method claimed auxiliaries are added due to the process. According to the invention this method is characterized in that polyvinylamines and/or the initial products thereof are used as these auxiliaries.
    Type: Application
    Filed: April 13, 2005
    Publication date: November 8, 2007
    Applicants: FRAUNHOFER-GESELLSCHAFT ZUR FOEDERUNG DER ANGEWAND TEN FORSCHUNG E .V., G.U.S. BETEILIGUNGS GMBH, WOLFRAM BERGBAU – UND HUETTEN-GMBH NFG. KG, H.C. STARCK GMBH, KENNAMETAL GMBH & CO. KG, WERKZEUGE + HARTSTOFFE, KENNAMETAL WIDIA GMBH & CO. KG, GUEHRING OHG, HARTMETALL AG, CERATIZIT S.A.
    Inventors: Gottfried Boden, Sven Thiele, Manfred Nebelung