Abstract: An augmented reality, virtual reality, or other wearable apparatus comprises an eye tracking device comprising an image sensor, a lens, and one or more processors. In some embodiments, the lens comprises a marker, and the one or more processors are configured to receive an image from the image sensor, wherein the image shows the marker, determine a distance from the image sensor to the marker based on the image, and change a calibration parameter of an eye tracking algorithm based on the distance. In some embodiments, the one or more processors are configured to receive image data from the image sensor, wherein the image data corresponds to an image as observed through the lens, determine a level or pattern of pincushion distortion in the image based on the image data, and change a calibration parameter of an eye tracking algorithm based on the level or the pattern of pincushion distortion.

Abstract: A hand-held electrically powered cut-off tool (100, 200, 800, 1000, 1900) comprising a first part (110) and a second part (120) arranged vibrationally isolated from each other, the first part (110) comprising an arm (116) arranged to support a cutting disc (130) and an electric motor (140) arranged to drive the cutting disc, the second part (120) comprising front (190) and rear (195) handles for operating the cut-off tool, and a battery compartment (150) for holding an electrical storage device (220, 1800) such as a battery arranged to power the electric motor (140), wherein one or more damping members (170, 1910) are arranged in-between the first part (110) and the second part (120), where at least one damping member (170, 1910) is formed in a resilient material associated with a damping coefficient.

Abstract: A handheld cut-off saw (300) for cutting concrete and stone, the handheld cut-off saw comprising a drive arrangement (100, 200, 600, 800) for driving a circular cutting tool (110), the drive arrangement comprising: a belt drive portion (120) comprising a first pulley (121) and a second pulley (122), wherein the first pulley is arranged to be powered by a power source (130) and to drive the second pulley via a belt (123), wherein the second pulley (122) has a larger pitch diameter than the first pulley (121); and a gear transmission portion (140) comprising a first gearwheel (141) and a second gearwheel (142), wherein the first gearwheel (141) is co-axially connected to the second pulley (122) and radially connected to the second gearwheel (142), and wherein the second gearwheel (142) is arranged to be co-axially connected to the circular cutting tool (110).

Abstract: The present disclosure relates to a hand-held power tool (1) comprising a rotatable work tool (2) with a center (16) and a circumference (17) and having a direction of rotation (19). The power tool (1) further comprises a blade guard arrangement (8) that is arranged to shield a variable part of the rotatable work tool (2) and comprises a blade guard (12) and a swiveling cover part (11, 11?, 11?) attached to the blade guard (12). In a first position, the swiveling cover part (11, 11?, 11?) is positioned such that a first arc (A) of a circle is covered, following the blade guard (12), and running an angular distance along the circumference (17) after the blade guard (12), in the direction of rotation (19). The cover part (11) is moveable between the first position and a second position where a cutting operation of the rotatable work tool (2) along the first arc (A) of a circle is allowed. The cover part (11, 11?, 11?) is biased towards the first position.

Abstract: The present disclosure relates to a hand-held power tool (1) comprising a rotatable work tool (2) with a center (16) and a circumference (17) and having a direction of rotation (19). The power tool (1) further comprises a blade guard arrangement (8) that is arranged to shield a variable part of the rotatable work tool (2) and comprises a blade guard (12) and a swiveling cover part (11, 11?, 11?) attached to the blade guard (12). In a first position, the swiveling cover part (11, 11?, 11?) is positioned such that a first arc (A) of a circle is covered, following the blade guard (12), and running an angular distance along the circumference (17) after the blade guard (12), in the direction of rotation (19). The cover part (11) is moveable between the first position and a second position where a cutting operation of the rotatable work tool (2) along the first arc (A) of a circle is allowed. The cover part (11, 11?, 11?) is biased towards the first position.

Abstract: A cover (30) for concealing one or more components (20) of a power tool (10) presented herein. The cover (30) can include a through recess (52) between an inner surface (702) and an outer surface (708). The through-recess (52) being arranged for receiving a threaded member (80) protruding from the tool (10) and extending between an inner opening (704) at the inner surface (702) and an outer opening (706) at the outer surface (708). A threaded nut (60) for engaging the threaded member (80) for tightening the cover (30) to the tool (10) can be included. Additionally, the threaded nut (60) can be attached to the cover (30). The nut (60) can include a radially protruding portion (70) with a larger radius than the inner opening (704) and outer opening (706). The cover (30) can have opposing first and second shoulder portions (712, 714) surrounding the inner opening (704) and outer opening (706).

Abstract: A cover (30) for concealing one or more components (20) of a power tool (10) presented herein. The cover (30) can include a through recess (52) between an inner surface (702) and an outer surface (708). The through-recess (52) being arranged for receiving a threaded member (80) protruding from the tool (10) and extending between an inner opening (704) at the inner surface (702) and an outer opening (706) at the outer surface (708). A threaded nut (60) for engaging the threaded member (80) for tightening the cover (30) to the tool (10) can be included. Additionally, the threaded nut (60) can be attached to the cover (30). The nut (60) can include a radially protruding portion (70) with a larger radius than the inner opening (704) and outer opening (706). The cover (30) can have opposing first and second shoulder portions (712, 714) surrounding the inner opening (704) and outer opening (706).

Abstract: The present invention relates to a portable power tool (1) arranged for driving a rotatable cutting tool (2). The power tool (1) comprises a motor (5) and a transmission part (4) that is arranged to transfer power from the motor (5) to a tool holder (10), and comprises a first arm part (11; 11?) and a second arm part (12; 12?). The first arm part (11; 11?) comprises a first belt pulley (13) and the second arm part comprises a second belt pulley (14), the arm parts (11, 12; 11?, 12?) being slidably connected to each other. The belt pulleys (13, 14) are spaced apart by a certain distance (d-i, d2). The transmission part (4) further comprises a tensioning device (20) with a rod (21), a pre-tensioned resilient device (22), a linkage arrangement (25) and a rotatable part (26).

Abstract: The present invention relates to a portable power tool (1) arranged for driving a rotatable cutting tool (2). The power tool (1) comprises a motor (5) and a transmission part (4) that is arranged to transfer power from the motor (5) to a tool holder (10), and comprises a first arm part (11; 11?) and a second arm part (12; 12?). The first arm part (11; 11?) comprises a first belt pulley (13) and the second arm part comprises a second belt pulley (14), the arm parts (11, 12; 11?, 12?) being slidably connected to each other. The belt pulleys (13, 14) are spaced apart by a certain distance (d-i, d2). The transmission part (4) further comprises a tensioning device (20) with a rod (21), a pre-tensioned resilient device (22), a linkage arrangement (25) and a rotatable part (26).

Abstract: This invention relates to a flexible intake system for a crankcase scavenged two-stroke internal combustion engine (10) having an additional air supply to its transfer ducts. The intake system comprises a flexible intake duct (22) connecting a fuel supply unit (21) e.g. a carburetor with an engine cylinder (11) and at least one flexible air duct (40) connecting a valve housing (42) for additional air with the engine cylinder. The end portion of the flexible intake duct (22) and at least one air duct (40) is secured to the cylinder by means of a baffle (23) made of a stiffer material than the ducts (22, 40) themselves.

Abstract: This invention relates to a flexible intake system for a crankcase scavenged two-stroke internal combustion engine (10) having an additional air supply to its transfer ducts. The intake system comprises a flexible intake duct (22) connecting a fuel supply unit (21) e.g. a carburettor with an engine cylinder (11) and at least one flexible air duct (40) connecting a valve housing (42) for additional air with the engine cylinder. The end portion of the flexible intake duct (22) and at least one air duct (40) is secured to the cylinder by means of a baffle (23) made of a stiffer material than the ducts (22, 40) themselves.

Abstract: A portable, hand-held, combustion engine powered working machine comprises a tool unit (1) including a rotatable working tool (3), and a machine unit (2) including an internal combustion engine (11), an assembly (16) for supplying air and fuel to the engine, and an air cleaning system, which comprises a filter assembly (10) including at least two filters (84, 85), referred to as pre-filter (84) and main filter (85), for cleaning the air that shall be supplied to the engine.

Abstract: A portable working machine comprising a tool unit (1) with a disc guard and a circular tool (3), and a machine unit (2) with a filter system (10), an internal combustion engine (11) with an engine cylinder (13) with bore (12) having a centre line (30), a crankshaft (14) and a crankcase (15), a fuel tank (17), a muffler (18) with an entrance port (46) provided in the rear side of the muffler and facing an exhaust port (47) of the cylinder, handles (19, 20) controls (21, 22) and supports (23, 24) on the underside of the machine unit for allowing upright positioning of the machine on a flat ground.

Abstract: A portable, hand-held, combustion engine powered working machine comprises a tool unit (1) including a rotatable working tool (3), and a machine unit (2) including an internal combustion engine (11), an assembly (16) for supplying air and fuel to the engine, and an air cleaning system, which comprises a filter assembly (10) including at least two filters (84, 85), referred to as pre-filter (84) and main filter (85), for cleaning the air that shall be supplied to the engine.

Abstract: A portable working machine comprising a tool unit (1) with a disc guard and a circular, disc-shaped tool (3), which can be rotated about an axis of rotation (4), which is horizontal in the normal upraised position of the machine, and a machine unit (2), which includes at least a filter system (10), which is at least partly accommodated in a top part of the machine unit, an internal combustion engine (11) with an engine cylinder (13) with bore (12) having a centre line (30), a crankshaft (14) and a crankcase (15), as assembly (16) comprising members for supplying air and fuel to the engine, a fuel tank (17), a muffler (18) with an entrance port (46) provided in the rear side (42) of the muffler and facing an exhaust port (47) of the cylinder (13), i.e.