Patents by Inventor Udo K. Fischer

Udo K. Fischer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Cemented carbide body with increased wear resistance
    Patent number: 5413869
    Abstract: A cemented carbide button for rock drilling comprises a core and a surface zone surrounding the core whereby both the surface zone and the core contains WC (alpha-phase) and a binder phase based on at least one of Co, Ni, or Fe and the core in addition contains eta-phase. The eta-phase core extends to the very top (working) surface of the button and as a result is obtained longer life and higher drilling rate particularly for rotating crushing drilling, cutting drilling and percussive drilling in soft rocks.
    Type: Grant
    Filed: November 13, 1992
    Date of Patent: May 9, 1995
    Assignee: Sandvik AB
    Inventors: E. Torbjorn Hartzell, Udo K. Fischer, Jan Akerman
  • Method of making a cemented carbide body for tools and wear parts
    Patent number: 5333520
    Abstract: A method for manufacturing of a cemented carbide body for cutting tools, rock drilling tools or wear parts with complicated geometry characterized in that the body is sintered together from simpler pressed but unsintered parts to form a body with desired complex geometry.
    Type: Grant
    Filed: May 18, 1993
    Date of Patent: August 2, 1994
    Assignee: Sandvik AB
    Inventors: Udo K. Fischer, Jan Akerman, Bengt A. Asberg, Stig E. Lagerberg