Patents by Inventor Karl E. Sundkvist

Karl E. Sundkvist 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).

  • Tire second order harmonics with rib shift methodology
    Patent number: 8718990
    Abstract: A method of improving the high-speed uniformity of tire performance that reduces low and/or high harmonics. The method includes determining a force variation that is created by rotation of a first tire, having a first tread design, at high speed. A second order harmonic of the force variation is analyzed. A second tire design is generated that circumferentially shifts one or more ribs of the first tread design to minimize the second order harmonic alone or in combination with other order harmonics.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: May 6, 2014
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Tao Song, Karl E. Sundkvist
  • Tire tread
    Patent number: D366858
    Type: Grant
    Filed: January 31, 1994
    Date of Patent: February 6, 1996
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: John S. Attinello, Maurice Graas, Karl E. Sundkvist
  • Tire tread
    Patent number: D373338
    Type: Grant
    Filed: September 28, 1995
    Date of Patent: September 3, 1996
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: John S. Attinello, Maurice Graas, Karl E. Sundkvist
  • Tire tread
    Patent number: D373556
    Type: Grant
    Filed: September 28, 1995
    Date of Patent: September 10, 1996
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: John S. Attinello, Maurice Graas, Karl E. Sundkvist