An outdoor tool includes a powerhead, a tool unit powered by the powerhead, and a shaft assembly extending between the powerhead and the tool unit. The tool unit includes a transmission housing, a support plate, a guide bar adjustably supported by the support plate, a drive gear, and a chain circumscribing a portion of the drive gear and a portion of the guide bar, the drive gear operatively coupled to the powerhead. The tool unit further includes a tension adjustment mechanism for adjusting a position of the guide bar relative to the drive gear to increase and decrease a tension in the chain. The tension adjustment mechanism includes an adjustment screw, a threaded adjustment bolt, at least one adjustment gear, and a member coupled to the adjustment bolt and the guide bar. Rotation of the adjustment screw causes translation of the guide bar relative to the drive gear.

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 chainsaw includes a chainsaw body, a guide bar and a saw chain. The chainsaw body includes an oil tank, an oil pump to supply oil stored in the oil tank to a sliding portion between the guide bar and the saw chain, a first extension chamber arranged above the oil tank and a second extension chamber arranged above the first extension chamber. The oil tank communicates with the first extension chamber via a first flow path, the first extension chamber communicates with the second extension chamber via a second flow path and a vent hole communicating with the outer space is formed in the second extension chamber.

A chainsaw includes a chainsaw body, a guide bar and a saw chain. The chainsaw body includes an oil tank, an oil pump to supply oil stored in the oil tank to a sliding portion between the guide bar and the saw chain, a first extension chamber arranged above the oil tank and a second extension chamber arranged above the first extension chamber. The oil tank communicates with the first extension chamber via a first flow path, the first extension chamber communicates with the second extension chamber via a second flow path and a vent hole communicating with the outer space is formed in the second extension chamber.

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 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.

The present invention relates to an oil pump for use in and attached to a device (e.g., chain saw) having an oil-supplied portion requiring an oil supply. An oil pump supplies lubricating oil to a guide groove of a guide bar in such a manner that a plunger having a gear portion meshing with a drive worm provided on a chain saw reciprocally moves in a pump body while rotating. Two guide pins for positioning an oil pump when attaching the oil pump to a chain saw body are provided on an attachment surface of the pump body to the chain saw body. The two guide pins are spaced apart in an axial direction of the plunger, each disposed on a centerline of a transverse cross section of the plunger.

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 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).