Hitachi Koki Co., Ltd.

Shigeru Takahashi

Tomomasa Nishikawa

Nobuhiro Takano

Kazuhiko Funabashi

Takeshi Taniguchi

Masanori Watanabe

Katsuhiro Oomori

Hiroyuki Hanawa

Takao Aradachi

Mizuho Nakamura

Takafumi Itoh

Hitoshi Tsuzuki

Naoki Tadokoro

Hironori Mashiko

Takuma Saito

Kenichi Yamada

Yutaka Ito

Jyunichi Suzuki

In order to provide the electrical apparatus capable of improving the handleability, the electrical apparatus of the present invention includes the fan main body portion converting electrical power into wind to output the converted wind from a front face side to an outside of the fan main body portion, the pair of side frames supporting the fan main body portion, the pair of bottom frames extending from lower ends of the side frames to a rear side, the connecting frame connecting the pair of bottom frames, and the battery retaining portion having a rechargeable battery for supplying electrical power to the fan main body portion detachably attached thereto, where the battery retaining portion is provided in the connecting frame and disposed with a space from an air inlet port at a rear face of the tan main body portion.

Electrical apparatus

An impact tool () includes a motor (); a hammer () having a rotational axis extending in a first direction, the hammer () being rotatable in a rotational direction including a forward direction and a reverse direction opposite to the forward direction by the motor () and being movable in the first direction and a second direction opposite to the first direction; an anvil () disposed at the first direction side of the hammer () and strikable by the hammer () in the forward direction, the hammer () that has been struck the anvil () being moved in the second direction to come free from the anvil (); and a fixing member (A,A) that selectively allows the hammer () to move in the second direction or prevents the hammer () from moving in the second direction.

Impact tool

A charging system has a battery pack and a charging device. The battery pack has a battery cell and a plurality of identifiers that identify a configuration of the battery cell. The charging device has a charging unit, a signal transmission unit, a reading unit, and a control unit. The charging unit charges the battery pack. The signal transmission unit transmits a first signal and a second signal to the battery pack separately to read the plurality of identifiers when the battery pack is attached to the charging unit. The reading unit reads the plurality of identifiers according to the first and second signals to determine the configuration of the battery cell. The control unit controls the charging unit according to the configuration of the battery cell.

Charging system for charging battery pack

A power toolincludes a cylindrical-shaped yoke, magnetsprovided in the interior of the yoke, an armaturedisposed rotatably in the interior of the yoke, a cooling fanrotatably secured to the armature, a fan guidedisposed on the periphery of the cooling fan, and a cylindrical-shaped housingfor storing the yoketherein. The fan guideis contacted with the axial-direction one end face of the yoke, and the fan guideis engaged with the yokein the rotation direction thereof.

Power tool with yoke rotation prevention means

Battery pack

Growing community of inventors

Hitachinaka, Japan

Shigeru Takahashi