Patents Assigned to Hitachi Koki Co., Tld
  • Electric Power Tool
    Publication number: 20110180286
    Abstract: An electric power tool (1) includes a brushless direct-current motor (3) and a drive circuit that supplies drive power to the motor, the power tool rotates or drives a tool, whereby the drive circuit includes plural switching elements (21), and is arranged on a board (9) provided in a grip portion of a housing or below the grip portion; and an electric fan (22) is provided in the vicinity of the switching element for cooling the switching element.
    Type: Application
    Filed: May 20, 2009
    Publication date: July 28, 2011
    Applicant: Hitachi Koki Co., Tld
    Inventors: Katsuhiro Oomori, Junichi Toukairin, Hiroki Uchida