A chainsaw (100) includes a power unit and a working assembly powered responsive to operation of the power unit. The working assembly includes a guide bar (120) around which a chain is rotatable. The guide bar (120) includes a first side plate (200) and a second side plate (210) facing each other and extending away from the housing (110) to a nose of the guide bar (120), the first and second side plates (200 and 210) each including an inner sidewall (224 and 222) facing inwardly toward each other. Each of the inner sidewalls (224 and 222) includes a recessed portion (230) at which material of the inner sidewalls (224 and 222) has been removed.

A chain saw disclosed herein may include a motor configured to rotate a saw chain about a guide bar, a control unit configured to control a voltage applied to the motor, a body housing that houses the motor and the control unit, a battery detachably attached to the body housing, and a top handle provided above the body housing. The control unit may be disposed above the battery. In a rear view of the chain saw in a state where the chain saw is placed on a mount surface, the battery and the control unit may not overlap. In a top view of the chain saw in the state where the chain saw is placed on the mount surface, the battery and the control unit may overlap at least partially.

A chain saw disclosed herein may include a motor configured to rotate a saw chain about a guide bar, a control unit configured to control a voltage applied to the motor, a body housing that houses the motor and the control unit, a battery detachably attached to the body housing, and a top handle provided above the body housing. The control unit may be disposed above the battery. In a rear view of the chain saw in a state where the chain saw is placed on a mount surface, the battery and the control unit may not overlap. In a top view of the chain saw in the state where the chain saw is placed on the mount surface, the battery and the control unit may overlap at least partially.

A chainsaw apparatus has a guide bar, a drive sprocket, and endless cutting chain mounted over the guide bar and over the drive sprocket, a first motor drivingly connected to the drive sprocket so as to cause the drive spot sprocket to move the endless chain over the guide bar, the first control device for controlling operation of the first motor and configured to deliver at least one first data representative of an operation of the motor, a storage tank suitable adapted to receive a lubricating fluid therein, a pump cooperative with the storage tank so as to deliver the lubricating fluid toward the guide bar and the endless cutting chain, a second motor drivingly connected to the pump, and a second control device for controlling operation of the second motor on the basis of a lubricating control parameter derived from the first data. The second motor is an electric motor.

A chainsaw apparatus has a guide bar, a drive sprocket, and endless cutting chain mounted over the guide bar and over the drive sprocket, a first motor drivingly connected to the drive sprocket so as to cause the drive spot sprocket to move the endless chain over the guide bar, the first control device for controlling operation of the first motor and configured to deliver at least one first data representative of an operation of the motor, a storage tank suitable adapted to receive a lubricating fluid therein, a pump cooperative with the storage tank so as to deliver the lubricating fluid toward the guide bar and the endless cutting chain, a second motor drivingly connected to the pump, and a second control device for controlling operation of the second motor on the basis of a lubricating control parameter derived from the first data. The second motor is an electric motor.

Disclosed is a new type of dosing device in a tree-processing device and a method for using it. The dosing device comprises a pump (2) to be attached to the processing device and a feed hose (15) connected to the pump (2) for leading the treatment agent fed by the pump (2) to the point of use. In the device is a replaceable treatment-agent cartridge (7) and the treatment-agent cartridge contains treatment agent. The cartridge is attached to the inlet port of the pump (2) by means of an adapter (4).

Disclosed is a new type of dosing device in a tree-processing device and a method for using it. The dosing device comprises a pump (2) to be attached to the processing device and a feed hose (15) connected to the pump (2) for leading the treatment agent fed by the pump (2) to the point of use. In the device is a replaceable treatment-agent cartridge (7) and the treatment-agent cartridge contains treatment agent. The cartridge is attached to the inlet port of the pump (2) by means of an adapter (4).

A guide wheel cooling liquid delivery system of chain saw guide plate is provided. The guide wheel cooling liquid delivery system of chain saw guide plate includes at least a liquid inlet channel provided at the rear part of the chain saw guide plate, the liquid inlet channel is connected to the liquid inlet hole, the front part of the chain saw guide plate is provided with an anti-blocking liquid outlet structure, the anti-blocking liquid outlet structure is close to the middle of the guide wheel installation area, and the liquid inlet channel is connected to the anti-blocking liquid outlet structure through at least a liquid guide channel.

A guide wheel cooling liquid delivery system of chain saw guide plate is provided. The guide wheel cooling liquid delivery system of chain saw guide plate includes at least a liquid inlet channel provided at the rear part of the chain saw guide plate, the liquid inlet channel is connected to the liquid inlet hole, the front part of the chain saw guide plate is provided with an anti-blocking liquid outlet structure, the anti-blocking liquid outlet structure is close to the middle of the guide wheel installation area, and the liquid inlet channel is connected to the anti-blocking liquid outlet structure through at least a liquid guide channel.

A handheld power tool (100) comprising at least one orientation sensor (150) is provided. The handheld power tool (100) is operatively connected to a controller (160; 210) and said controller (160; 210) is configured to receive orientation data from the at least one orientation sensor (150), wherein the orientation data comprises information associated with an orientation of at least a portion of the handheld power tool (100) and to determine operational data based on the orientation data, said operational data representing work performed using the handheld power tool (100). The operational data is determined by determining the orientation of the power tool based on the received orientation data from the at least one orientation sensor (150).