Patents by Inventor Robert S. Lundberg

Robert S. Lundberg 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).

  • Low temperature bond for abrasive tools
    Patent number: 5863308
    Abstract: The present invention provides a vitreous-bonded abrasive tool wherein the abrasive grit portion comprises a thermally sensitive abrasive grain, such as sintered sol gel microcrystalline alpha alumina abrasive grain or superabrasive grain, and wherein the vitrified bond may be matured by firing at a temperature below about 875.degree. C. The invention further includes a novel vitrified bond composition.
    Type: Grant
    Filed: October 31, 1997
    Date of Patent: January 26, 1999
    Assignee: Norton Company
    Inventors: Dongxin Qi, Robert S. Lundberg
  • Sol-gel alumina abrasive wheel with improved corner holding
    Patent number: 5573561
    Abstract: The present invention provides a vitreous-bonded abrasive grinding wheel wherein the abrasive grit portion comprises a sol-gel alumina abrasive and wherein the wheel has improved corner or form holding characteristics and mechanical properties. The invention further includes the bond composition which allows for improved corner or form holding and mechanical properties with sol-gel alumina abrasives.
    Type: Grant
    Filed: July 20, 1994
    Date of Patent: November 12, 1996
    Assignee: Norton Company
    Inventors: David A. Sheldon, Robert S. Lundberg, Xiaoming Li
  • Alumina abrasive wheel with improved corner holding
    Patent number: 5536283
    Abstract: The present invention provides a vitreous-bonded abrasive grinding wheel wherein the abrasive grit portion comprises an alumina abrasive and wherein the wheel has improved corner or form holding characteristics and mechanical properties. The invention further includes the bond composition which allows for improved corner or form holding and mechanical properties with alumina abrasives.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: July 16, 1996
    Assignee: Norton Company
    Inventors: David A. Sheldon, Robert S. Lundberg
  • Sol-gel alumina abrasive wheel with improved corner holding
    Patent number: 5401284
    Abstract: The present invention provides a vitreous-bonded abrasive grinding wheel wherein the abrasive grit portion comprises a sol-gel alumina abrasive and wherein the wheel has improved corner or form holding characteristics and mechanical properties. The invention further includes the bond composition which allows for improved corner or form holding and mechanical properties with sol-gel alumina abrasives.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: March 28, 1995
    Inventors: David A. Sheldon, Robert S. Lundberg, Xiaoming Li