Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electric Works, Ltd.

Panasonic Electric Works Power Tools Co., Ltd.

Masamichi Nakamura

Masaki Ikeda

Motoharu Muto

Hidekazu Yuasa

Fumiaki Sekino

Hiroshi Matsumoto

Yoshikazu Okada

Masami Nakane

The electric tool is powered by a secondary battery as a power source, and includes: an output section configured to be transmitted thereto a rotation of a motor directly or through a decelerator; a voltage measurement section that measures a battery voltage; a storage means that stores, as a reference voltage, a voltage value of the battery voltage measured preliminarily when a motor-lock is occurring; and a control means that controls a driving of the motor. The control means is configured to decide that the motor is being locked and then stop or decelerate the motor upon detecting that the battery voltage measured through the voltage measurement section is maintained lower than or equal to the reference voltage stored in the storage means for a predetermined period of time during the driving of the motor.

Rechargeable electric tool and method for manufacturing rechargeable electric tool

An electric power tool includes a body part for outputting a rotational force at one end thereof, a grip part provided to extend from the body part in an intersecting relationship with the body part, and a suspension link provided at the other end of the body part for hanging the body part. The suspension link is configured to ensure that, if the body part is suspended from the suspension link using the suspension link as a pivot point, the electric power tool is kept by a weight balance in a horizontal posture in which the extension direction of the grip part is substantially orthogonal to the vertical direction or an inclined horizontal posture in which the joint portion of the body part and the grip part is positioned at the upper side.

Electric power tool with a holding device

A power tool includes a grip portion having a vertically extending axis; a main body provided at a top end of the grip portion and having an axis intersecting the vertical axis; a motor; an output portion projecting from the grip portion and rotatingly driven by the motor; a trigger provided for movement along a trigger moving zone; a stopper portion accommodated in the grip portion for protrusion and retraction into and from the trigger moving zone, the stopper portion adapted to selectively make contact with the trigger to thereby limit the maximum pulling amount of the trigger; and a stopper operating portion for operating the stopper portion. The stopper portion is protruded into or retracted from the trigger moving zone by slidingly actuating the stopper operating portion in a crosswise direction perpendicularly intersecting the axis of the main body as viewed from the top.

Power tool

Growing community of inventors

Shiga, Japan

Masamichi Nakamura