Provided is a two-piston hydraulic striking device that has stable operativity. This two-piston hydraulic striking device includes two striking mechanisms for striking one transfer member. Each striking mechanism has a pressure receiving area ratio between the front and rear of a piston thereof set in such a way that the two striking mechanisms have the same cycle time.

A work tool includes a motor, a driving mechanism, a housing, a handle, a detecting mechanism and an elastic support part. The detecting mechanism is configured to detect information corresponding to an operating state of the work tool. The elastic support part supports the detecting mechanism so as to be movable relative to the housing in at least two of a front-rear direction, an up-down direction and a left-right direction. The elastic support part includes at least one elastic member disposed between the detecting mechanism and the housing. The elastic support part has respectively different spring constants in the at least two directions.

A power tool communication system including an external device including a first controller configured to transmit, via wireless communication to a power tool, configuration data including a work light duration parameter value and a work light brightness parameter value. The power tool includes a housing, a brushless direct current (DC) motor, a trigger, a work light, a wireless communication circuit configured to wirelessly communicate with the external device to receive the configuration data, and a second controller configured to control a work light duration of the work light based on the work light duration parameter value, and control a work light brightness of the work light based on the work light brightness parameter value.

The present disclosure generally relates to quick change attachments for a pneumatic percussive tool. The attachments convert a pneumatic percussive tool, such as an air impact tool with proximal attachment means, which has a “pushing” force, into a pneumatic percussive tool having a “pulling” force. Once attached to the pneumatic percussive tool, the attachments also provide a quick change feature for allowing “pulling” tools to be simply and easily removed and replaced.

A hand-held driver device, comprising a solid impact body, configured to provide a user a surface for driving fasteners, an adjustable strap attached to a top surface of the solid impact body for retaining the solid impact body on the user's hand, a pair of inextensible rings attached to the adjustable strap, the pair of inextensible rings laterally opposed to each other and configured to provide a secure attachment point between the adjustable strap and the solid impact body, an adjustment device attached to the adjustable strap for modifying the length of the adjustable strap, an insulating surface integral to the top surface of the solid impact body, which is configured to conform to the shape of the user's hand and provide impact protection to the user's hand during use of the hand-held driver device, and a sacrificial bottom surface integral to the solid impact body, which is configured to make contact with the fasteners.

In a hand-held power tool including a gear for driving an output shaft, which is situated in an assigned gear housing, and including a mode-setting unit for setting the operating mode for an impact drilling mode, a drilling mode, or a screwing mode, the mode-setting unit including a rotatable actuating element and a rotatable setting element coupled to the rotatable actuating element. The setting element is coupled, at least in one operating mode, to a transmission element which is mounted on the gear housing and is axially displaceable on the gear housing in a screwing position assigned to the screwing mode and is axially fixed on the gear housing in impact drilling and drilling positions assigned to the impact drilling and drilling modes. The actuating element and the setting element are formed as one piece from plastic.

A power tool communication system including an external device including a first controller configured to transmit, via wireless communication to a power tool, configuration data including a work light duration parameter value and a work light brightness parameter value. The power tool includes a housing, a brushless direct current (DC) motor, a trigger, a work light, a wireless communication circuit configured to wirelessly communicate with the external device to receive the configuration data, and a second controller configured to control a work light duration of the work light based on the work light duration parameter value, and control a work light brightness of the work light based on the work light brightness parameter value.

In a hand-held power tool with a drive unit comprising at least one drive motor and a transmission coupled to the drive motor for driving a working tool, wherein the transmission can be shifted between at least two different gear ratios, a communication interface is provided for communication with a guide unit operable by a user and designed to receive gearshift instructions from the guide unit for shifting the transmission between the two different gear ratios according to the specific use.

In one example, a system includes a hammer extender having a head formed from an upper layer, a lower layer and a side layer. The hammer extender includes an elongated body portion having a solid core elongated portion and a hollow core elongated portion. One end of the solid core elongated portion is connected to the head, and the other end is connected to the hollow core elongated portion. The hollow core elongated portion can receive and guide a nail during impact. The system may include a hammer having a hammer handle with a hollow interior to store the hammer extender.

A force-limiting and damping device has a body, a tapping element, a shock-absorbing element, and a limiting module. The body has a connecting segment and a holding segment. The tapping element is connected to the body to move relative to the connecting segment and has a mounting segment, a tapping segment, and a fixing segment. The mounting segment is movably connected to the connecting segment. The tapping segment is disposed on an end of the mounting segment below the connecting segment. The fixing segment is connected to the mounting segment and abuts the connecting segment. The shock-absorbing element is mounted on the mounting segment and abuts the connecting segment and the tapping segment. The limiting module is mounted between the body and the tapping element and has a force-limiting element mounted between the mounting segment and the connecting segment to provide a force-limiting reminder effect and a damping effect.