Chain bar apparatus and methods are disclosed that may be formed from plastic, metal or other materials. Laser cutting of a chain bar core can provide improved structural characteristics, for example when adhesive is used to assemble the chain bar. Flow diversion elements can be used to optimize flow throughout the chain bar.

A handheld work apparatus has a motor unit, a tool unit and an outrigger having a carrier part. The outrigger connects the motor unit to the tool unit. The carrier part has a base plate having an inner side and an outer side. A drive shaft and a driven shaft are arranged transversely to the base plate. The carrier part has a first stiffening structure, which rises from the inner side of the base plate toward a space diagonal. On the outer side of the base plate, a second stiffening structure rises toward the same space diagonal, wherein the first stiffening structure and the second stiffening structure conjointly form a spatially diagonally running stiffening element.

A cutting chain 200 for a chainsaw 100 may include a plurality of drive links 210, and a plurality of cutter links 240. Each of the drive links 210 includes a top portion and a bottom portion that interfaces with a guide bar 120 of the chainsaw 100. The cutter links 240 are operably coupled to respective ones of the drive links 210 at the top portion thereof. At least one of the cutter links 240 includes a base portion 280 and a cutting portion 270 extending away from the base portion 280. The cutting portion 270 includes a side plate 300 and a top plate 310, the top plate 310 including a top face 316 and a bottom face 314. The side plate 300 includes an outer face and an inside face 304. Multiple coating materials are provided on respective different surfaces of the drive links 210 or cutter links 240 such that different coating materials are applied based on a wear context of the respective different surfaces.

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 first and second side plates (200 and 210), a sprocket wheel (220), first and second shims (240 and 242), and first and second sealing members (244 and 245). The first and second side plates (200 and 210) each face other and extend away from a housing (110) to a nose. The sprocket wheel (220) is provided at the nose between the first and second side plates (200 and 210). The first and second shims (240 and 242) are disposed between the first and second side plates (200 and 210), respectively, and corresponding ones of first and second sides of the sprocket wheel (220). The first sealing member (244) is disposed between the first shim (240) and the first side of the sprocket wheel (220). The second sealing member (245) is disposed between the second shim (242) and the second side of the sprocket wheel (220).

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 5 which a chain (210) is rotatable. The guide bar (120) includes first and second side plates (400, 410), a core (420) and a tension indicator (240). The first and second side plates (400, 410) each face other and extend away from a housing (110) to a nose. The core (420) is disposed between the first side plate (400) and the second side plate (410). The tension indicator (240) is provided at the core (420) and is visible at at least one of the first side plate 10 (400) or the second side plate (410). The tension indicator (240) is configured to indicate a chain tension based on a position of the guide bar (120).

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 first and second side plates (200, 210) and a laminate core (260). The guide bar (120) is configured to deliver water through at least a portion of the guide bar (120). The first and second side plates (200, 210) each face other and extend away from a housing (110) to a nose. The laminate core (260) is disposed between the first side plate (200) and the second side plate (210). The laminate core (260) includes channels (270) for delivery of the water to nozzles (300, 310, 320) formed along a periphery of the guide bar (120). A glue layer (280) is provided to affix the laminate core (260) to the first side plate (200) and second side plate (210), respectively. The glue layer (280) forms the nozzles (300, 310, 320) in combination with the laminate core (260).

A guide bar of a chain saw according to the present invention includes: an elongated plate-shaped guide bar body that supports a saw chain on its peripheral edge portion; a plurality of elongated holes formed through the guide bar body and positioned at both sides of a region that has a predetermined width and includes a central axis line CL extending in a longitudinal direction of the guide bar body, such that the region is positioned between the elongated holes, which are elongated in the longitudinal direction; and a plurality of attachment members, each of which is pre-formed in such a shape as to seal up a corresponding one of the elongated holes and attached to the corresponding elongated hole.

A method of modifying a cutter link (240) of cutting chain (200) for a chainsaw (100) may include forming the cutter link (240) to include a base portion (280) and a cutting portion (270) extending away from the base portion (280). The cutting portion (270) may include a side plate (300/500) and a top plate (310/510). The top plate (310/510) may include a top plate leading edge (312/412/512) and a bottom face (314/414/514). The side plate (300/500) may include a side plate leading edge (302/402/502) and an inside face (304/404/504). The method may further include removing at least a portion of material forming the bottom face (314/414/514). The portion of material forming the bottom face (314/414/514) that is removed decreases as distance from the top plate leading edge (312/412/512) increases.

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).

A guide bar for a saw chain has oppositely arranged outer side faces facing away from each other. A guide groove is formed on a peripheral edge of the guide bar and receives and guides the saw chain. The guide bar has a longitudinal center axis and extends lengthwise in a length direction along the longitudinal center axis. A rearward clamping end is provided for securing the guide bar. A leading deflecting section deflects the saw chain and the deflecting section is arranged opposite the rearward clamping end in the length direction. A cutout is formed between the rearward clamping end and the leading deflecting section. A weight-reducing insert is inserted into the cutout and is provided with external elevations that are projecting past a plane of the sides faces of the guide bar.