Patents by Inventor Tor Norrgrann

Tor Norrgrann 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).

  • Fixture and loading method for PVD coating of cutting tool inserts
    Patent number: 7048248
    Abstract: A method of loading cutting tool inserts in a PVD (Physical Vapor Deposition) coating equipment consists in using a tube manufactured of a non-magnetic metallic material surrounding a stack of alternating discs of a magnetic material and iron. The north poles of the magnets are directed towards each other and the cutting inserts are positioned on the outer wall of the solid tube and kept in place by the magnetic forces.
    Type: Grant
    Filed: July 4, 2000
    Date of Patent: May 23, 2006
    Assignee: Sandvik Intellectual Property AB
    Inventors: Tor Norrgrann, Ingemar Hessman
  • Batch loading system for CVD
    Patent number: 5759621
    Abstract: There is provided a method of coating cutting tool inserts by CVD methods with a completely covering coating. During the coating step, the inserts are resting in contact with the support in only a few tiny spots and sufficient space is allowed around each insert to ascertain optimum coating conditions. In a preferred embodiment, each insert rests on a peg allowing a rational production in larger scale and fully automatic CVD loading.
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: June 2, 1998
    Assignee: Sandvik AB
    Inventors: Tor Norrgrann, Kjell Palsson, Bjorn Ljungberg, Ingemar Hessman
  • Batch loading system for CVD
    Patent number: 5576058
    Abstract: There is provided a method of coating cutting tool inserts by CVD methods with a completely covering coating. During the coating step, the inserts are resting in contact with the support in only a few tiny spots and sufficient space is allowed around each insert to ascertain optimum coating conditions. In a preferred embodiment, each insert rests on a peg allowing a rational production in larger scale and fully automatic CVD loading.
    Type: Grant
    Filed: March 17, 1995
    Date of Patent: November 19, 1996
    Assignee: Sandvik AB
    Inventors: Tor Norrgrann, Kjell P.ang.lsson, Bjorn Ljungberg