Patents by Inventor Takeda Kazutoshi

Takeda Kazutoshi 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).

  • Contactless power supply system
    Patent number: 7009860
    Abstract: A contactless power supply system that limits current to inductive wires, even when circuit load varies. The inductive wires are connected in series to a capacitor and a variable inductor to yield a capacitive impedance at a predetermined frequency f (e.g., 10 KHz). In doing so, a finite current at the predetermined frequency f can be asserted to the inductive wires even when circuit load is reduced to 0. Consequently the current fluctuation in the inductive wires is suppressed and the contactless power supply system becomes more manageable.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: March 7, 2006
    Assignee: Daifuku Co., Ltd.
    Inventor: Takeda Kazutoshi
  • Contactless power supply system
    Publication number: 20050135129
    Abstract: A contactless power supply system that limits current to inductive wires, even when circuit load varies. The inductive wires are connected in series to a capacitor and a variable inductor to yield a capacitive impedance at a predetermined frequency f (e.g., 10 KHz). In doing so, a finite current at the predetermined frequency f can be asserted to the inductive wires even when circuit load is reduced to 0. Consequently the current fluctuation in the inductive wires is suppressed and the contactless power supply system becomes more manageable.
    Type: Application
    Filed: December 3, 2004
    Publication date: June 23, 2005
    Inventor: Takeda Kazutoshi