A method is provided for operating a hand-guided processing device that has a rotating and/or circulating cutting tool, an electric motor drive system wherein the electric motor drive system is configured for generating a torque for driving the cutting tool, and a user-operable control element. The method automatically monitors whether a blocking criterion is fulfilled, wherein the blocking criterion is characteristic of a blocking of the cutting tool, and if the blocking criterion is fulfilled and the control element operated, automatically lowers the torque generated by the electric motor drive system, and temporally thereafter, automatically increases the torque generated by the electric motor drive system.

A hand-guided treatment device has a motor housing, a retaining body arranged in a side region of the motor housing for holding a guide element protruding from the motor housing for a treatment tool which rotates or circulates around the guide element, and an electric drive motor arranged in the motor housing for driving the treatment tool. The drive motor includes a drive shaft with a tool drive region passing through the retaining body, and a rotor held rotationally fixedly on the drive shaft. A lubricant pump drive is coupled to a lubricant pump drive region of the drive shaft for driving a lubricant pump arranged in the motor housing for supplying lubricant to the treatment tool. The lubricant pump drive region and the tool drive region of the drive shaft are arranged on opposite sides of the rotor.

A short bar sprocket and pump assembly as well as short bar sprocket and pump and chainsaw motor assemblies are provided. A short bar assembly having a cooling assembly attached thereto is provided. A chainsaw chain drive assembly having a cooling assembly for the chain drive is provided.

A short bar sprocket and pump assembly as well as short bar sprocket and pump and chainsaw motor assemblies are provided. A short bar assembly having a cooling assembly attached thereto is provided. A chainsaw chain drive assembly having a cooling assembly for the chain drive is provided.

A hand-portable garden, forestry and/or construction processing device has a cutting tool, an electric drive motor, a motor operating element, and a control device. The cutting tool is designed for cutting through work. The drive motor is designed for driving the cutting tool. The motor operating element is user-adjustable over an adjustment range from a minimum setting to a maximum setting. The control device is designed for controlling a target speed of the drive motor in accordance with a setting of the motor operating element in at least one first operating mode and one second operating mode. In the first operating mode, the target speed increases over at least one segment from a minimum of 0.5 times the adjustment range as the setting increases, wherein the increase changes over the segment by a maximum of 60%. In the second operating mode, the target speed is a minimum of 0.9 times a maximum target speed of the second operating mode as the setting increases from a maximum of 50% of the adjustment range.

A hand-portable garden, forestry and/or construction processing device has a cutting tool, an electric drive motor, a motor operating element, and a control device. The cutting tool is designed for cutting through work. The drive motor is designed for driving the cutting tool. The motor operating element is user-adjustable over an adjustment range from a minimum setting to a maximum setting. The control device is designed for controlling a target speed of the drive motor in accordance with a setting of the motor operating element in at least one first operating mode and one second operating mode. In the first operating mode, the target speed increases over at least one segment from a minimum of 0.5 times the adjustment range as the setting increases, wherein the increase changes over the segment by a maximum of 60%. In the second operating mode, the target speed is a minimum of 0.9 times a maximum target speed of the second operating mode as the setting increases from a maximum of 50% of the adjustment range.

The disclosure provides a container, a cover and a chainsaw. The container includes a box body, a cover, a suction device, a first tube and a second tube. The box body is provided with a liquid storage cavity provided with a liquid filling opening and a liquid suction opening. The cover is detachably mounted on the liquid filling opening and is provided with a one-way ventilation structure. The suction device is arranged outside the box body. One end of the first tube is connected with the liquid suction opening, and the other end is connected with a liquid suction port of the suction device. One end of the second tube is connected with a liquid drainage port of the suction device, and the other end extends to a part to be lubricated or cooled of the cutting tool.

Disclosed is a chain saw and a power tool, including a working part, a body, a brushless motor, a power supply device, a drive circuit, a controller, and a motion detection device. The motion detection device is coupled to the body or the working part for detecting a motion of the body or the working part in at least one direction. The controller is configured to control the drive circuit to make the brushless motor enter a braking mode when the amount of the motion of the body or the working part in at least one direction exceeds a predetermined threshold.

A concrete cutting machine includes a motor, a pivot arm, and a concrete cutting chain assembly. The motor has an output drive, and the pivot arm has an input coupled to the output drive for receiving power from the motor. The arm is configured to pivot relative to the motor, and the pivot arm has a pivot arm output. The concrete cutting chain assembly is supported on the pivot arm and has a power input coupled to the pivot arm output. The chain assembly is configured to be pivotable relative to the pivot arm.

A concrete cutting machine includes a motor, a pivot arm, and a concrete cutting chain assembly. The motor has an output drive, and the pivot arm has an input coupled to the output drive for receiving power from the motor. The arm is configured to pivot relative to the motor, and the pivot arm has a pivot arm output. The concrete cutting chain assembly is supported on the pivot arm and has a power input coupled to the pivot arm output. The chain assembly is configured to be pivotable relative to the pivot arm.