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 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 power tool has an internal combustion engine with a carburetor with choke element pivotably arranged therein. A starter device with an actuating element has an operating position, off position, and at least one start position. A coupling element connects the actuating element with a choke actuating lever. The actuating element, upon adjustment from operating position into the at least one start position, moves the choke element into its start position. The connection between actuating element and choke actuating lever has a relative movement device which, in one position of the choke element, enables movement of actuating element relative to choke actuating lever. A holding device with guide contour is secured on the carburetor housing. In a start position of the choke element, the guide contour prevents movement of the actuating element relative to choke actuating lever from its start position into the operating position.

Provided is a chainsaw in which increasing the rotation angle of a brake handle during assembly of component parts around the brake handle facilitates assembling. A chainsaw has a brake mechanism for braking a saw chain via the operation of a brake handle, wherein the housing body side of the chainsaw is provided with: the brake handle, which actuates brakes; a brake link mechanism for actuating the brakes via operation of the brake handle; and a brake spring. A brake link cover for covering the brake mechanism is mounted using screw bosses. A rotation angle limiting member for limiting the rotation range of the brake handle is provided on the brake link cover side. Detaching the brake link cover increases the rotation range of the brake handle.

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 power tool includes a switch moveable between a first position enabling activation of a motor and a second position disabling the motor. The power tool includes a trigger movably coupled to a housing of the power tool between an OFF position and an ON position. The switch moves from the second position to the first position in response to the trigger moving from the OFF position to the ON position. The power tool includes a trigger lock-off pivotably coupled to the housing between a lock position and an unlock position. The trigger lock-off is engageable with the trigger to inhibit movement of the trigger from the OFF position to the ON position when the trigger lock-off is in the lock position. The trigger lock-off allows movement of the trigger from the OFF position to the ON position when the trigger lock-off is in the unlock position.

A handheld, portable work apparatus includes a housing defining an interior space, a drive motor arranged in the housing for driving a tool, a brake device assigned to the tool, a hand guard, and a switching unit which is arranged in the interior space of the housing for detecting the position of the brake device. The hand guard is arranged outside the housing and has an actuation contour for actuating the switching unit. The housing has an elastic element. The hand guard, the elastic element and the switching unit are arranged relative to one another such that the switching unit can be actuated by the elastic element being pushed in via the actuation contour of the hand guard.

Improved chain saws, components for chain saws, methods of making chain saws and components, and methods of using chain saws and components are disclosed. In some embodiments, a chain saw comprises a saw bar and a plurality of links, wherein a first link has a hook that engages a recess of a second link, thereby coupling the first link and the second link and allowing them to articulate without decoupling. The saw bar may have a rail, and the links may have grooves such that the links straddle and ride over the rail. The rail may have a projection and the grooves of the links may have notches accommodating the projection such that the projection prevents dislocation of the links. The links may have conical or pyramidal cutting teeth. The chain may be bidirectional. Robotic and automated operation of saws and other instruments are also disclosed.

A chainsaw including a guide bar; a chain disposed around the guide bar and movable relative to the guide bar; a motor operably coupled to the chain to drive the chain about the guide bar; a handle; a speed controller in communication with the motor to affect a motor speed; and a momentary switch, wherein the momentary switch restricts actuation of the speed controller when the momentary switch is in a resting state, wherein the momentary switch allows actuation of the speed controller when the momentary switch is in an activated state, wherein the momentary switch comprises a base rotatably coupled to the handle and an articulated arm rotatably coupled to the base, and wherein the momentary switch is biased to the resting state.

Systems and methods for a chainsaw safety device are described. In some embodiments, a method comprises activating a chainsaw, receiving a first acceleration value associated with acceleration of the chainsaw, comparing the first acceleration value to a predetermined acceleration threshold, and deactivating the chainsaw based on the comparison.