Patents by Inventor Thomas Ellingson

Thomas Ellingson 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).

  • Sintered abrasive tools
    Patent number: 5891206
    Abstract: Light weight metal bonded abrasive tools consisting of an annular rim of metal bonded superabrasive joined to a central core or hub made from a dissimilar metal, such as aluminum powder, are manufactured in a single sintering step that yields a near net shape abrasive tool. The abrasive tools are useful for the grinding of optical components made of plastic or glass.
    Type: Grant
    Filed: May 8, 1997
    Date of Patent: April 6, 1999
    Assignee: Norton Company
    Inventor: Thomas Ellingson
  • High permeability grinding wheels
    Patent number: 5738697
    Abstract: An abrasive article having certain minimum levels of permeability to fluids comprises about 40 to 80%, by volume interconnected porosity and effective amounts of abrasive grain and bond to carry out soft grinding and deep cut grinding operations. The high permeability to the passage of fluids and interconnected porosity provides an open structure of channels to permit the passage of fluid through the abrasive article and the removal of swarf from the workpiece during grinding operations.
    Type: Grant
    Filed: July 26, 1996
    Date of Patent: April 14, 1998
    Assignee: Norton Company
    Inventors: Mianxue Wu, Normand D. Corbin, Stephen E. Fox, Thomas Ellingson, Lee A. Carman