Abstract: A power tool apparatus includes a housing, a control board, a working part, a motor and a fan. The housing has a battery pack cavity. The battery pack cavity is configured to install a battery pack. The control board is disposed within the housing. The working part is disposed on the housing. The motor is disposed within the housing. The motor drives the working part to operate. The air duct is disposed within the housing. The air duct is configured for heat dissipation of the power tool apparatus. The fan is fixedly connected to an output shaft of the motor. The fan is configured to drive air to flow along the air duct when rotating. The housing has at least two air inlets and at least one first air outlet. The air duct is disposed between the air inlets and the first air outlet.

Abstract: An electric height adjustment device includes a supporting base, a cutting frame, a driving assembly and a measuring structure. The supporting base is provided with an accommodating cavity. The cutting frame is arranged in the accommodating cavity, performs a reciprocating linear motion in a direction perpendicular to a working plane, and is used to carry a cutting prime mover. The driving assembly includes an electric driving unit fixed on the supporting base and a transmission structure connected with the cutting frame. The transmission structure converts a rotation motion of the electric driving unit into a linear motion of the cutting frame. A height of the cutting prime mover from a ground can be adjusted through the driving assembly. The measuring structure includes at least two first sensors for sensing a hollow area and a shielding area, and signals collected by the at least two first sensors have a phase difference.

Abstract: A forestry management device is provided including processing circuitry configured to receive an indication of a selected tree, receive selected tree location data associated with the selected tree, receive operator location data associated with an operator, and cause information associated with the selected tree to be displayed on a wearable computing device.

Abstract: Some example embodiments may provide a capability for intelligent control or management of a number of assets in connection with yard maintenance with the assistance or inclusion of a management unit having distributed properties. Thus, for example, sensor equipment and task performance equipment operation may be coordinated between local management and remote management entities for efficient monitoring and maintaining of lawn wellness.

Abstract: 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.

Abstract: A lift detection arrangement in a robotic lawnmower for detecting a lift of a body of the robotic lawnmower relative to a chassis of the robotic lawnmower. The lift detection arrangement includes a collision absorber; and a sensor arrangement including a spring, a movable part, a metal plate and a sensor. The collision absorber is screwed to two plastic parts and arranged to allow a displacement of the body relative to the chassis in a collision plane during a collision between an obstacle and the robotic lawnmower, but not in a vertical direction. The moveable part is arranged to provide a displacement of the body relative to the chassis in a lift direction during a lift of the body. The sensor is configured to sense the distance to the metal plate that is fixed to the moveable part and to trigger a cut off of power to a cutting blade of the robotic lawnmower if the distance becomes greater than a predetermined distance.

Abstract: A chest buckle for a harness for carrying a handheld motor-driven work tool, the chest buckle including first and second parts, wherein the first and second part, each includes at least two mechanisms attaching straps of the harness thereto. The first part includes a recess defining a cavity arranged to accommodate the second part therein. The second part includes a resilient locking member arranged to protrude through a hole in the first part when the second part is accommodated in the cavity to lock the first and second parts together.

Abstract: A forestry management device is provided including processing circuitry configured to receive an indication of a selected tree, receive selected tree location data associated with the selected tree, receive operator location data associated with an operator, and cause information associated with the selected tree to be displayed on a wearable computing device.

Abstract: A forestry management device is provided including processing circuitry configured to receive an indication of a selected tree, receive selected tree location data associated with the selected tree, receive operator location data associated with an operator, and cause information associated with the selected tree to be displayed on a wearable computing device.

Abstract: A drive system includes a first transmission, a second transmission and at least one flexible driving member. The first transmission is operably coupled to a first set of wheels to provide drive power to the first set of wheels responsive to engagement of the first transmission. The second transmission is operably coupled to a second set of wheels to provide drive power to the second set of wheels responsive to engagement of the second transmission. The at least one flexible driving member is operably coupled to a remote actuator and a drive shaft of the walk-behind outdoor power equipment device. The at least one flexible member selectively engages one of the first transmission or the second transmission to switch a walk-behind outdoor power equipment device between all wheel drive operation and another drive mode via the remote actuator.

Abstract: A carrier assembly for a harness for carrying a handheld motor-driven work tool, the carrier assembly including a back plate having connections for shoulder straps, a hip belt, and a manner for attaching the work tool. The back plate is arranged to be connected to the hip belt by a pivotal connection joint to allow rotation about an axis substantially perpendicular to a plane defined by the back plate.

Abstract: Some example embodiments may provide a capability for intelligent control or management of a number of assets in connection with yard maintenance with the assistance or inclusion of a management unit having distributed properties. Thus, for example, sensor equipment and task performance equipment operation may be coordinated between local management and remote management entities for efficient monitoring and maintaining of lawn wellness.

Abstract: A carrier assembly for a harness for carrying a backpack accessory, the carrier assembly including a back plate including connections for shoulder straps and an interface plate adapted to be attached to the backpack accessory. The back plate includes a coupling interface on a rear face arranged to be removably connected to a corresponding coupling interface on a front face of the interface plate.

Abstract: A carrier assembly for a harness for carrying a motor-driven power tool, the carrier assembly including a back plate and an interface plate including connections for shoulder straps. The back plate includes a coupling interface on a front face arranged to be removably connected to a corresponding coupling interface on a rear face of the interface plate. The coupling interface of the back plate is adapted to be connected to and disconnected from the coupling interface of the interface plate in an at least partially translational or linear movement which is substantially parallel to the back plate.

Abstract: Some example embodiments may provide a capability for intelligent control or management of a number of assets in connection with yard maintenance with the assistance or inclusion of a management unit having distributed properties. Thus, for example, sensor equipment and task performance equipment operation may be coordinated between local management and remote management entities for efficient monitoring and maintaining of lawn wellness.

Abstract: A lawn care device may include a cutting deck housing at least one blade, a rotatable shaft, and a blade coupler operably coupled to the rotatable shaft. The blade coupler may define a blade channel configured to at least partially enclose four sides of a blade inserted therein. The blade coupler may include a support base and a sleeve that is movable relative to the support base based on a compression state of a biasing element. The blade may be insertable into the blade channel by orienting the blade to apply a force to sidewalls of the sleeve to shift the biasing element to a compressed state and rotating the blade proximate to the support base to enable the biasing element to shift to an extended state in which sidewalls of the sleeve define sidewalls of the blade channel.

Abstract: A lift detection arrangement in a robotic lawnmower for detecting a lift of a body of the robotic lawnmower relative to a chassis of the robotic lawnmower. The lift detection arrangement includes a collision absorber; and a sensor arrangement including a spring, a movable part, a metal plate and a sensor. The collision absorber is screwed to two plastic parts and arranged to allow a displacement of the body relative to the chassis in a collision plane during a collision between an obstacle and the robotic lawnmower, but not in a vertical direction. The moveable part is arranged to provide a displacement of the body relative to the chassis in a lift direction during a lift of the body. The sensor is configured to sense the distance to the metal plate that is fixed to the moveable part and to trigger a cut off of power to a cutting blade of the robotic lawnmower if the distance becomes greater than a predetermined distance.

Abstract: A chest buckle for a harness for carrying a handheld motor-driven work tool, the chest buckle including first and second parts, wherein the first and second part, each includes at least two mechanisms attaching straps of the harness thereto. The first part includes a recess defining a cavity arranged to accommodate the second part therein. The second part includes a resilient locking member arranged to protrude through a hole in the first part when the second part is accommodated in the cavity to lock the first and second parts together.

Abstract: A carrier assembly for a harness for carrying a handheld motor-driven work tool, the carrier assembly including a back plate having connections for shoulder straps, a hip belt, and a manner for attaching the work tool. The back plate is arranged to be connected to the hip belt by a pivotal connection joint to allow rotation about an axis substantially perpendicular to a plane defined by the back plate.

Abstract: 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.