Patents by Inventor Nobihiro Takano

Nobihiro Takano 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).

  • Power tool
    Patent number: 8686675
    Abstract: According to an aspect of the present invention, there is provided a power tool including: a motor; a switching device that switches over, in response to a conduction angle thereof, an AC voltage to be applied to the motor; a rotation speed setting unit that sets a target rotation speed of the motor; a rotation speed detection unit that detects an actual rotation speed of the motor; and a controller that determines the conduction angle by comparing the actual rotation speed with the target rotation speed and that controls the switching device by use of the conduction angle based on a maximum conduction angle, the maximum conduction angle being set in accordance with the target rotation speed.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: April 1, 2014
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Yoshikazu Kawano, Nobihiro Takano, Eiji Nakayama, Kenro Ishimaru, Kazumi Tanaka, Masahiro Isono