Abstract: The present disclosure relates to a starter pulley arrangement for an internal combustion engine. The arrangement comprises a cord drum (1) configured to house a starting rope wound thereon, a driver (3) configured to interact with a flywheel (5) or other part connected to an engine crankshaft, and a torsion spring (7) connecting the cord drum (1) to the driver (3), such that the cord drum can resiliently urge the engine crankshaft via the driver. The torsion spring (7) is tensioned in a resting position where the driver does not influence the crankshaft. This provides an improved resistance against wear on the parts of the starter pulley arrangement.

Abstract: A blower may include a housing having a handle, an electric motor powered by a battery pack, and a fan assembly operably coupled to the electric motor to force air through a blower tube responsive to operation of the electric motor. The blower tube defines a blower tube axis. The fan assembly creates a low pressure area in a intake chamber that provides the air to the fan assembly. The air enters the intake chamber via at least one radial entrance and an axial entrance disposed in the housing. The axial entrance is configured to receive cooling air that has passed through the battery pack.

Abstract: The present invention relates to a laying machine for laying at least one flexible casing or tube, cable or wire including: a blade arrangement for making a trench in the ground, a consolidation and laying means being arranged behind the blade arrangement, for clearing and safe-guarding the trench from collapsing while laying at least one flexible casing or tube, cable or wire into the trench. A blade assembly comprising compartments for cooling fluid and air.

Abstract: A sealing member (2), for waterproof sealing of a volume, comprises a hollow, generally cylindrical body and a sealing area (5a, 5b) at the respective axial ends thereof. At least one sealing area (5a) comprises a first radially extending portion (6) and a second portion (7) extending in a reverse direction partly overlapping the first portion. The second portion (7) has a free end and is arranged for pressing towards the first portion (6), thereby forming a seal with the first portion (6). A sealing system comprises a sealing member (2) as above, a sealing seat (9) for abutment against the sealing member (2), and a counterpart surface (11), for pressing the sealing member (2) against the sealing seat (9). The sealing seat (9) comprises an inclined surface (10). A work tool (1) comprising the above-mentioned sealing system has at least one sealing area (5a) of the sealing member (2) pressed between a housing (4) and a chassis (3) of the work tool (1).

Abstract: The present invention relates to a floor surfacing machine (1) comprising a frame (2) that is carried by a first wheel (3) and a second wheel (4). The floor surfacing machine (1) further comprises a first motor (6), a handle arrangement (7), at least one planetary head (15) that is rotatably mounted to the frame (2) and at least one satellite surfacing head (19, 20, 21) that is rotatably mounted to the planetary head (15), where the first motor (6) is arranged to propel the planetary head (15). The floor surfacing machine (1) comprises a first control unit (10), and a remote control panel (11) which in turn comprises a second control unit (12) that is arranged to communicate with the first control unit (10). The floor surfacing machine (1) also comprises a second motor (22) that is arranged to propel the satellite surfacing heads (19, 20, 21) such that the planetary head (15) and the satellite surfacing heads (19, 20, 21) are independently operable.

Abstract: A hose device may include a flexible hose device body having a first end configured to be attached to a cyclone and a second end with a free opening. The hose device may also include a plurality of weights affixed between the first end and the second end. When subjected to suction forces from a vacuum of the cyclone, the second end may be sucked upwards such that the plurality of weights hingedly swing toward the first end and the hose device body is in a retracted configuration. When released from the suction forces of the cyclone, the plurality of weights hingedly swing away from the first end and the hose device body extends downwards into an extended configuration by the gravity forces acting upon the weights, in the absence of the suction forces, to expand a size of the free opening.

Abstract: A two-stroke engine piston (1) is disclosed comprising a piston top (3), a mantle surface (5), a stratified scavenging channel (7) in the mantle surface (5), and a weight reduction space (9) arranged between the piston top (3) and the stratified scavenging channel (7). The weight reduction space (9) has a largest first axial extent (a1) at the mantle surface (5) and a second axial extent (a2) radially inside the mantle surface (5), and wherein the second axial extent (a2) is greater than the largest first axial extent (a1). The present disclosure further relates to an engine (30), a hand-held tool (40), and a method of manufacturing an engine piston (1).

Abstract: A concrete cutting machine includes a motor, a pivot arm, and a concrete cutting chain assembly. The motor has an output drive, and the pivot arm has an input coupled to the output drive for receiving power from the motor. The arm is configured to pivot relative to the motor, and the pivot arm has a pivot arm output. The concrete cutting chain assembly is supported on the pivot arm and has a power input coupled to the pivot arm output. The chain assembly is configured to be pivotable relative to the pivot arm.

Abstract: A cutting blade for a clearing saw includes a plurality of teeth, with at least some of the teeth having a leading edge, a trailing edge, and a point in between the leading and trailing edges. The trailing edge can be hardened to a depth in the range 0.02-1.5 mm, and the leading edge may be left unhardened to provide a cutting blade with increased durability and efficiency, that can still be filed manually to remain sharp.

Abstract: A robotic work tool system, comprising a charging station and a robotic work tool, said robotic work tool comprising two charging connectors arranged on an upper side of the robotic work tool and said charging station comprising two charging connectors and a supporting structure arranged to carry said charging connectors and to extend over and above said robotic work tool as the robotic work tool enters the charging station for establishing electrical contact between the charging connectors of the robotic work tool and the charging connectors of the charging station from above, wherein said supporting structure is arranged to allow the robotic work tool exit the charging station by driving through the charging station without reversing.

Abstract: The present disclosure relates to a grinding head (1) for a floor grinding machine for grinding floor surfaces of stone or stone-like material. Such a grinding head (1) comprises a lower casing member (3), comprising a lower support (31) and an upwardly extending edge portion (32), and an upper casing number (2), comprising an upper cover (21) and a downwardly extending edge portion (22), wherein the upper casing member (2) is joinable to the lower casing member (3) by causing axially distal portions of the edge portions to bear on each other.

Abstract: A robotic vehicle may include one or more functional components configured to execute lawn care function, a sensor network comprising one or more sensors configured to detect conditions proximate to the robotic vehicle, a positioning module configured to determine robotic vehicle position while the robotic vehicle traverses a parcel, and a boundary management module configured to enable the robotic vehicle to be operated within a bounded area. The bounded area may include a variable boundary, and the boundary management module may be configured to receive instructions from an operator to adjust the variable boundary.

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.