Patents by Inventor Youichi Akutsu

Youichi Akutsu 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 detecting a change in the property of a rubber member
    Patent number: 5999004
    Abstract: The electrical impedance of a dumbbell-shaped rubber sheet (1) is measured, and the deterioration of the dumbbell-shaped rubber sheet (1) is detected from the result of the measurement. The present invention relates to a method of detecting a change in the property of a rubber member or a rubber member of a rubber bearing, such as a change in the shape or dimensions thereof, a change in the state of the stress and strain thereof, deterioration thereof, and the like.
    Type: Grant
    Filed: August 8, 1996
    Date of Patent: December 7, 1999
    Assignee: Japan Atomic Energy Research Insittute
    Inventors: Yoshinao Okawa, Youichi Akutsu, Ikuo Shimoda, Masayoshi Ikenaga