Patents by Inventor Hisashi Osumi

Hisashi Osumi 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 for analyzing nonlinear restoring force characteristic with hysteresis of machine structure system
    Patent number: 6574570
    Abstract: The invention discloses a method for analyzing nonlinear restoring force characteristic with hysteresis of a machine structure system, capable of easily and high-accurately performing analysis of nonlinear vibration characteristic of the machine structure system having a displacement strain characteristic dependent on a past history. When analysis is performed for the nonlinear restoring force characteristic of the machine structure system, having force-displacement hysteresis, approximate mode analysis is carried out by representing the nonlinear restoring force characteristic having the history by an equivalent linear characteristic.
    Type: Grant
    Filed: August 29, 2001
    Date of Patent: June 3, 2003
    Assignee: Chuo University
    Inventors: Hisayoshi Sato, Hisashi Osumi, Naruhiro Irino