Patents by Inventor Manaba Takamoto

Manaba Takamoto 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).

  • Commutation type DC breaker
    Patent number: 8270128
    Abstract: A commutation type DC breaker comprising a main switch inserted in series into a main circuit for connecting a DC source and a load, a commutation capacitor, a reactor, and a commutation switch for supplying charges stored in the commutation capacitor to the main switch in an opposite direction to a main circuit current, producing a current zero point, thereby breaking the main switch, characterized in that the commutation capacitor, the reactor, and the commutation switch which are composed a commutation circuit and a control circuit for controlling the turning on or off of the main switch and the commutation switch are loaded on a frame with the main switch loaded.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: September 18, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Noriaki Munakata, Masato Suzuki, Yoshihiko Matsuda, Naoki Kawamura, Manaba Takamoto