Patents by Inventor Yukihiro Shima

Yukihiro Shima 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).

  • Battery charger determining charging conditions depending upon whether a cooling device is provided
    Patent number: 6204639
    Abstract: To provide inexpensive and economic battery chargers with excellent productivity, a control circuit board for the battery charger is produced so as to be usable in common for both the battery chargers with a cooling device and the battery chargers without a cooling device. In the control circuit board, a cooling device detection circuit is provided for detecting whether or not the cooling device is provided. An average charge current to be applied to a battery pack to be charged is controlled depending on whether or not the cooling device is provided. The average charge current is further controlled depending on the type of the battery pack, i.e., whether it is of a small rated capacity or of a large rated capacity, and on a rate of change in battery temperature at the time of start of charging.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: March 20, 2001
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Nobuhiro Takano, Yoshio Iimura, Yukihiro Shima, Kenrou Ishimaru