A powered device includes a powerhead unit and an attachment unit selectively attachable to and powered by the powerhead unit. The powerhead unit includes a motor, a first shaft segment having a first driveshaft segment coupled to the motor, and a first connecting portion attached to the first shaft segment. The attachment unit includes an operational unit configured to be driven by the motor, a second shaft segment having a second driveshaft segment coupled to the operational unit, and a second connecting portion attached to the second shaft segment for coupling to the first connecting portion. One of the first connecting portion and the second connecting portion defines an axial opening having a keyway and includes a button having a hook portion. The other of the first connecting portion and the second connecting portion defines a slot and includes a key.

A tree and shrub cutting and trimming device having multiple robotic arms FIG. 2B and M for gross and fine movements, a wheeled movable base FIG. 3 and an electric cutting or trimming tool. This device allows the operator to be on the ground level, a substantial distance from the cutting surface and will not be holding the cutting or trimming device FIG. 6. This device drastically reduces insurance costs and labor cost, thus a less expensive much safer device to perform these tasks is provided in this field of endeavor.

A tree and shrub cutting and trimming device having multiple robotic arms FIG. 2B and M for gross and fine movements, a wheeled movable base FIG. 3 and an electric cutting or trimming tool. This device allows the operator to be on the ground level, a substantial distance from the cutting surface and will not be holding the cutting or trimming device FIG. 6. This device drastically reduces insurance costs and labor cost, thus a less expensive much safer device to perform these tasks is provided in this field of endeavor.

An electric working machine in one aspect of the present disclosure includes two or more circuits and a control circuit. The control circuit executes two or more diagnoses one by one in order. The diagnoses at least include a first diagnosis and a second diagnosis. The first diagnosis diagnoses a first circuit. The second diagnosis diagnoses a second circuit. The control circuit executes the first diagnosis or the second diagnosis at a first diagnosis timing. The control circuit executes the first diagnosis or the second diagnosis at a second diagnosis timing. The second diagnosis timing follows the first diagnosis timing.

An electric working machine in one aspect of the present disclosure includes two or more circuits and a control circuit. The control circuit executes two or more diagnoses one by one in order. The diagnoses at least include a first diagnosis and a second diagnosis. The first diagnosis diagnoses a first circuit. The second diagnosis diagnoses a second circuit. The control circuit executes the first diagnosis or the second diagnosis at a first diagnosis timing. The control circuit executes the first diagnosis or the second diagnosis at a second diagnosis timing. The second diagnosis timing follows the first diagnosis timing.

Disclosed herein is a power tool that includes a direct current power source, motor, and motor controller. In some embodiments, the power source comprises a battery pack configured to supply current at a nominal voltage in excess of 100 VDC. Embodiments of the tool are configured to operate at a high power at least comparable to tools operating at lower voltages, and to produce noise levels in operation that are less than 65 decibels.

Disclosed herein is a power tool that includes a direct current power source, motor, and motor controller. In some embodiments, the power source comprises a battery pack configured to supply current at a nominal voltage in excess of 100 VDC. Embodiments of the tool are configured to operate at a high power at least comparable to tools operating at lower voltages, and to produce noise levels in operation that are less than 65 decibels.

A control assembly for selectively controlling actuation of an electric motor arranged to power a hand-held power tool based on combined performance of two dissimilar operator actions and a hand-held power tool including such a control assembly. A switch member may be closed responsive to an enabling action including a first of the two dissimilar operator actions. A throttle control member becomes operable responsive to actuation of the throttle control member past a first movement threshold, i.e. a second dissimilar operator action, while the switch member is in the actuated state. The throttle control member remains repeatedly operable above a second movement threshold, even if the switch member is opened. Actuation of the throttle control member to below the second movement threshold will render the throttle control member non-operable until renewed combined performance of the first and second dissimilar operator actions.

A control assembly for selectively controlling actuation of an electric motor arranged to power a hand-held power tool based on combined performance of two dissimilar operator actions and a hand-held power tool including such a control assembly. A switch member may be closed responsive to an enabling action including a first of the two dissimilar operator actions. A throttle control member becomes operable responsive to actuation of the throttle control member past a first movement threshold, i.e. a second dissimilar operator action, while the switch member is in the actuated state. The throttle control member remains repeatedly operable above a second movement threshold, even if the switch member is opened. Actuation of the throttle control member to below the second movement threshold will render the throttle control member non-operable until renewed combined performance of the first and second dissimilar operator actions.

A hedge trimmer includes a blade assembly having a first blade and a second blade, a housing, a prime mover, and a transmission device. The first blade includes a first body portion and a plurality of first tooth portions, and the second blade includes a second body portion and a plurality of second tooth portions. The first blade includes a first connection assembly including a first driving portion and a first connecting portion, and the second blade includes a second connection assembly including a second driving portion and a second connecting portion. The first connecting portion and the first body portion form a detachable connection, the second connecting portion and the second body portion form a detachable connection, and the first connecting portion is at least partially located outside the housing.