Hitachi Koki Co., Ltd.

Yoshiaki Adachi

Yuichiro Sasaki

Kenichi Takaada

Hideki Kurosawa

Masato Sakai

Hideki Watanabe

Yasuo Eto

In an electric power tool having a clutch ring for adjusting a fastening torque, an outer member which are lower in hardness than a base member of the clutch ring has a plurality of projections discontinuously arranged on the outer peripheral face of the base member

Electric power tool

Portable electric saw

In a battery-driven tool, comprising a motor equipped with a fan and air windows arranged on the casing where the motor is positioned and for sending cooling air generated by rotation of the fan to outside, the object of the present invention is to send hydrogen gas generated by overdischarge to outside so that hydrogen gas is not accumulated in the battery chamber, and to exclude undesirable effect on the designing of the battery-driven tool. To attain the object, the motor chamber to accommodate the motor equipped with the fan is communicated with the battery chamber where the battery is accommodated.

Battery-driven tool having gas discharging function

Portable electric screw driver

Growing community of inventors

Hitachinaka, Japan

Yoshiaki Adachi