Patents by Inventor Kikuo Tsuruga

Kikuo Tsuruga 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).

  • Electric energy storage device with cell energy control, and method of controlling cell energy
    Patent number: 6538414
    Abstract: An energy adjusting device is provided which transfers energy charged in an arbitrary cell to the input/output terminals of a unit energy storage device. The energy adjusting device includes a transformer having a plurality of primary coils and a secondary coil mutually coupled magnetically but electrically insulated, switching circuits which open and close the circuits of the primary coils of the transformer connected to the arbitrary cell, a circuit connecting the secondary coil of the transformer via a rectifying circuit to the input/output terminals of the unit energy storage device, and a control circuit which, by operating the switching circuits, adjusts the amount of energy stored in the cells to a specific ratio with respect to the amount of energy stored by the unit energy storage device.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: March 25, 2003
    Assignee: Tokin Corporation
    Inventors: Kikuo Tsuruga, Akio Hasebe, Kazuya Mori, Sumiko Seki, Takahiko Ito