Patents by Inventor Masao Hatta

Masao Hatta 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 UPGRADING SEISMIC PERFORMANCE OF EXISTING SPILLWAY PIERS ON DAMS AND COUPLED EARTHQUAKE-RESISTANT STRUCTURE
    Publication number: 20120227193
    Abstract: A method of improving earthquake resistance of existing spillway piers provided in a dam. The method includes a following step. End portions of a main beam and top portions of existing spillway piers are connected to each other with a high damping device having a history damping property with high primary rigidity. The high damping device has a yield displacement amount in seismic velocity smaller than a tolerance of a displacement amount of the existing spillway piers. The high damping device has a yield load value in seismic velocity greater than a maximum seismic force generated therein in a bridge-axis direction due to a large-scale earthquake.
    Type: Application
    Filed: November 12, 2010
    Publication date: September 13, 2012
    Applicant: CHUBU ELECTRIC POWER CO., INC.
    Inventors: Hideya Suzuki, Tsukasa Yamawaki, Ikutaro Kumazaki, Masao Hatta