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 handheld lawn maintenance tool having a power head to which an adapter is attachable to allow both battery-powered and gasoline-powered working attachments to be attached thereto. The power head includes a power source, integrated first and second handles, a power generator, and a first attachment mechanism to which the adapter and/or working attachments are attachable.

An outdoor tool includes a powerhead unit and an attachment unit. The powerhead unit includes a motor, a housing assembly housing the motor and including a handle portion, and a first shaft segment supported within the housing assembly and extending along a shaft axis to a first connecting portion. The powerhead unit also includes a first driveshaft segment coupled to the motor and extending within the first shaft segment, a switch supported within the handle portion and operable to activate the motor, and a trigger assembly. The trigger assembly includes a trigger configured to selectively actuate the switch, a first lock-off member, and a second lock-off member. The attachment unit is selectively couplable to and powered by the powerhead unit.

The attachment unit includes an operational unit configured to be driven by the motor, a second shaft segment, and a second connecting portion.

A power tool includes an elongated shaft forming a handle constructed of a non-conductive material and a tool head located at one end of the handle. The tool head includes a working element and a driven shaft configured to drive the working element. A powerhead located at an opposite end of the handle and includes an input shaft. A driveshaft extends between the tool head and the powerhead. The driveshaft is rotatably coupled to the input shaft and the driven shaft to transfer torque from the powerhead to the working element of the tool head. At least a portion of the driveshaft extending between the powerhead and the working element is constructed of a non-conductive material to inhibit transmission of electricity from the working element to the powerhead.

A pole chain saw includes a connecting rod and a front end assembly disposed at the front end of the connecting rod. The front end assembly includes an electric motor; an output device including a guide plate and a chain wound around the guide plate, where the electric motor drives the chain to rotate; a transmission assembly connecting the electric motor to the output device; and a gearbox supporting and accommodating the transmission assembly, where at least part of the gearbox is made of metal. The chain saw can effectively enhance the heat dissipation effect of the gearbox and increase the service life of a transmission mechanism.

A method assists during execution of a sequence of cuttings in a tree, wherein, during a cutting sequence, a first cut in the tree is followed by a second cut in the tree At least a part of an ideal course of the second cut depends on at least a part of a course of the first cut. The method includes the steps of: identifying at least the part of the course of the first cut in the tree; precalculating at least the part of the ideal course of the second cut in the tree based on the identified part of the course of the first cut; and outputting cutting information for executing the second cut based on the precalculated part of the ideal course of the second cut.

A method obtains information for adjusting an adjustable component of a combustion engine drive system of a gardening and/or forestry apparatus. The method includes the steps of: providing a characteristic parameter using a mobile provision device, wherein the characteristic parameter describes a characteristic of an environment of the gardening and/or forestry apparatus; and obtaining the information for adjusting the adjustable component as a function of the provided characteristic parameter.

A power tool has a sprocket wheel cover mounted on a housing and a guide bar secured between housing and sprocket wheel cover and having a guide groove for a saw chain. The guide bar has a guide slot extending in a longitudinal direction of the guide bar and guiding the guide bar on a guide element for longitudinal movement relative to the housing. The guide bar has a first exterior side extending in a first plane and facing the housing and a second exterior side extending in a second plane and facing the sprocket wheel cover. The guide bar has an oil supply opening extending from the second exterior side into the guide groove and connected by an oil supply channel with an oil supply device. The oil supply channel has a channel section separate from the guide bar and extending from the first to the second plane.

The disclosure provides a multi-purpose portable gardening tool with multiple heads and combinations, belonging to the technical field of electric gardening tools. It solves the technical problems that the existing gardening tools have single function and are inconvenient to carry. The multi-purpose portable gardening tool with multiple heads and combinations includes a main machine, a function head, an extension tube, an extension intermediate head and a function intermediate head; the function head or the extension intermediate head is in spigot joint with a head end of the main machine, a head end of the extension intermediate head is connected to the extension tube having the function intermediate head at a head end thereof, and the function head is in spigot joint with a head end of the function intermediate head. The gardening tool in the disclosure at least includes three function heads, and may further extend more functions and methods of application by combining the function heads to the main machine and combining the main machine to the extension intermediate head, the function intermediate head and the extension tube, so that the gardening tool has more abundant functions to carry out multi-job operations only by one set of equipment, thereby improving convenience of use.

A positioning system for attachment to a vehicle for operation of a power tool by a ground-based operator sitting in the vehicle provides a telescoping mast attached to the vehicle, a pivot bracket connecting an upper arm to the upper portion of the telescoping mast, mounting means for mounting the power tool on the upper arm; and power means for operating the power tool from the operator's position in the vehicle.