Patents by Inventor Toru Ishitsuka

Toru Ishitsuka 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).

  • Method of modifying uniformity of a tire
    Patent number: 6347547
    Abstract: In order to reduce the second harmonic of tangential force variation (TFV) of tire constituting one of factors of vibration in high speed running of a vehicle, a tire is rotated at a vibration generating speed and phase and amplitude of the second harmonic of TFV are measured and mass members M are provided or eliminated at two locations opposed to each other in the diameter direction on a circumference of the tire such that the measured second harmonic of TFV is canceled by the second harmonic of TFV caused by providing or eliminating the masses.
    Type: Grant
    Filed: April 28, 1999
    Date of Patent: February 19, 2002
    Assignee: Toyo Tire & Rubber Co., Ltd.
    Inventors: Kinya Moriguchi, Toru Ishitsuka