Patents by Inventor Kazuhiro Funabashi

Kazuhiro Funabashi 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).

  • DC power source unit with battery charging function
    Patent number: 6683439
    Abstract: A DC power source unit supplies a DC voltage to an electrically powered tool through an adapter and also charges a battery pack used as an alternative power source of the tool. With the DC power source unit of the invention, a microcomputer receives a temperature signal indicative of a temperature of the battery pack and determines that the battery pack is fully charged based on the temperature signal. This determination is made regardless of whether the battery pack is being charged or not. As such, the fully charged condition of the battery pack can be accurately detected even if the tool is operated when the battery pack is almost fully charged.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: January 27, 2004
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Nobuhiro Takano, Takeshi Takeda, Eiji Nakayama, Kazuhiro Funabashi