Patents by Inventor Hirotaka Kumakura

Hirotaka Kumakura 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).

  • Engine-operated generator system
    Patent number: 5237260
    Abstract: An engine-operated generator system utilizes the switching elements of an inverter transformation circuit to accomplish starting. The starter circuit includes a battery, one electrode of which is connected to one terminal of a smoothing capacitor connected between the DC terminals of the inverter transformation circuit in such a manner that the electrode and the terminal are of the same polarity. The other electrode is connected to one of the output terminals of an AC generator system through a switch which is closed to start the engine, and which is connected to a reactor forming an LC circuit. In starting the engine, the rectifier circuit is driven in an inverter transformation mode, one of the switching elements in the inverter transformation circuit which is connected between the reactor and the one terminal of the smoothing capacitor being driven in a chopper mode. The inverter transformation circuit is formed by bridge-connecting switching elements each having a flywheel diode.
    Type: Grant
    Filed: November 13, 1991
    Date of Patent: August 17, 1993
    Assignees: Shinko Electric Co., Ltd., Nissan Motor Co., Ltd.
    Inventors: Yuzo Takakado, Hirohiko Murata, Takumi Yoshida, Hirotaka Kumakura