A power cutting tool includes at least one cutting strand, and at least one guide unit that is configured to guide the cutting strand. The power cutting tool further includes at least one coding unit which has at least one coding element that is configured to encode at least one coupling interface of the guide unit.

A chainsaw includes a housing having a handle housing portion, a motor housing portion, and a drive housing portion. The handle housing portion has a longitudinal axis that defines a first axis of the chainsaw. The chainsaw also includes a motor having an output shaft with a longitudinal axis that defines a second axis of the chainsaw, a driven gear coupled to the output shaft, a sprocket coupled to the driven gear, and a guide bar extending from the drive housing portion and having a longitudinal axis that defines a third axis of the chainsaw. A chain is supported on the guide bar and engaged with the sprocket. The first axis, the second axis, and the third axis are generally coplanar, and the first axis and the second axis define a first included angle between about 75 degrees and about 95 degrees.

A chainsaw includes a housing having a handle housing portion, a motor housing portion, and a drive housing portion. The handle housing portion has a longitudinal axis that defines a first axis of the chainsaw. The chainsaw also includes a motor having an output shaft with a longitudinal axis that defines a second axis of the chainsaw, a driven gear coupled to the output shaft, a sprocket coupled to the driven gear, and a guide bar extending from the drive housing portion and having a longitudinal axis that defines a third axis of the chainsaw. A chain is supported on the guide bar and engaged with the sprocket. The first axis, the second axis, and the third axis are generally coplanar, and the first axis and the second axis define a first included angle between about 75 degrees and about 95 degrees.

The present disclosure relates to a method (100) for production of a chainsaw guide bar (5). The method comprises the steps of providing (120) an elongated core plate (5) extending along a plane, and, in said plane has a length (Lc) in the longitudinal direction (D), and a width (Wc) perpendicular to the longitudinal direction (D), comprising a pair of opposite long side edges (33) and at least one detachable element (31) that extends along at least one of the long side edges of the core plate. Arranging (140) a side plate (23a, 23b) on each side of the core plate (25), thereby forming a sandwiched structure and joining (160) of the plates (23a, 23b, 25) for formation of an elongated guide bar (5), wherein the at least one detachable element (31) remains attached to the core plate (25). The disclosure also relates to a guide bar (5) for a chainsaw (1). The guide bar (5) comprises a laminated structure of at least three layers comprising a first side plate (23a), a second side plate (23b), and a core plate (25) disposed between said first side plate (23a) and said second side plate (23b), wherein the core plate (25) is provided with at least one detachable element (31). The disclosure also relates to an alternative method (200) of production of a chainsaw guide bar (5).

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.

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 tool coupling device for a receptacle of a machine tool separating device formed as a closed system includes at least one cutting strand tensioning unit that has at least one tensioning element. The tool coupling device also includes at least one operating unit that includes at least one operating element. The cutting strand tensioning unit includes at least one gear unit that is configured to move the tensioning element as a result of an actuation of the operating element of the operating unit.

A tool coupling device for a receptacle of a machine tool separating device formed as a closed system includes at least one cutting strand tensioning unit that has at least one tensioning element. The tool coupling device also includes at least one operating unit that includes at least one operating element. The cutting strand tensioning unit includes at least one gear unit that is configured to move the tensioning element as a result of an actuation of the operating element of the operating unit.

Provided is an electric power work device which includes: a body case; a work tool protruding forward from a front side with respect to the body case; a motor; and a battery supplying power to the motor. The motor is accommodated in the body case and the battery is detachably attached to a rear side with respect to the body case. A top handle is extended in a longitudinal direction at an upside with respect to the body case. The top handle includes, on an upper surface of a front part thereof, a thumb rest and a power switch. The power switch is arranged on a side in a lateral direction of the thumb rest.

A chainsaw apparatus has a body having a handle formed thereon or attached thereto, a motor, a saw blade coupled to the body so as to be extendable in transverse relationship to the longitudinal axis of the body, and a chain movably positioned on the saw blade. The motor is drivingly connected to the chain so as to cause the chain to move around the saw blade. The saw blade is adjustably coupled to the body so as to be movable between the position transverse to the longitudinal axis of the body to a position aligned with the longitudinal axis of the body. An angle adjustment mechanism is connected to the saw blade into the body. The angle adjustment mechanism is adapted to fix an angular position of the saw blade relative to the body.