Patents by Inventor Peder von Holst

Peder von Holst 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).

  • Ball nose end mills
    Patent number: 5558475
    Abstract: There is provided a solid ball nose tool comprising a hard material with 30-70 volume % submicron hard constituents in the form of carbides, nitrides and/or carbonitrides of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and/or W in a metallic matrix based on Fe, Co and/or Ni. The tool has a constant positive rake angle along the whole end radius of +8+2.degree. and a continuously decreasing clearance angle and towards the center where it is 10.+-.2.degree..
    Type: Grant
    Filed: September 30, 1993
    Date of Patent: September 24, 1996
    Assignee: Sandvik AB
    Inventors: Bjorn Hakansson, Peder Von Holst, Rolf Oskarsson
  • Threading tap
    Patent number: 5487626
    Abstract: A threading tap comprises a cylindrical shaft and a threading portion. At least the threading portion comprises a compound material comprising a core of high speed steel or tool steel and a cover of "Coronite".RTM., i.e., a hard material with 30 to 70% by volume of submicronic hard materials in the form of carbides, nitrides and/or carbonitrides of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and/or W in a metallic matrix based on Fe, Co and/or Ni. The chip surfaces adjacent to the cutting edges of the cutting threads have a negative rake angle. The threading tap has proven to be excellent at the threading of titanium-based alloys.
    Type: Grant
    Filed: September 7, 1994
    Date of Patent: January 30, 1996
    Assignee: Sandvik AB
    Inventors: Peder Von Holst, Josef Giessler
  • Method of making a hard material with properties between cemented carbide and high speed steel and the resulting material
    Patent number: 4973356
    Abstract: The present invention relates to a method of preparing an alloy for use as a cutting tool material comprising hard principles and binder phase by which a uniform distribution of the hard principles in the binder phase is obtained, and the resulting product.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: November 27, 1990
    Assignee: Sandvik AB
    Inventors: Peder von Holst, Hakan Morberg, Rolf Oskarsson