Abstract: The present invention is related to a retarding device for a hand held cutting machine having a housing (1) and a drive engine, which drives a transmission including a number of transmission members (3?, 2) and driving a rotational or semi rotational cutting tool. The retarding device includes brake means (12, 17) arranged to be in close relation with the transmission and for actuating a retarding force on a transmission member (2), the brake means being arranged to automatically put a retarding force on said transmission member when the speed of rotation or the torque of rotation of said transmission member falls below a predetermined value.

Abstract: A device for a motor driven tool such as a pole hedge trimmer, a pole saw or the like. The tool includes a drive unit that via a shaft tube is connected to a cutting unit. The cutting unit is turnably secured at the shaft tube by the device which is a turnable connection, wherein the cutting unit is movable between a range of at least two working positions and a transport position. The cutting unit is provided with one or several movable cutting elements and the tool is provided with locking structure for locking the movement of the cutting elements when the cutting unit is in the transport position.

Abstract: A motor driven tool such as a pole hedge trimmer, a pole saw or the like includes a drive unit (11) that via a shaft tube (12) enclosing a drive shaft and being provided with a handle (16), is connected to a cutting unit (13) which is turnably secured to the shaft tube. The turnable connection is under the influence of a locking mechanism (L) which from the normal working position of the operator can be released by means of a control means (M) arranged at a distance from the locking mechanism (L) and close to the handle (16).

Abstract: The present invention is related to a retarding device for a hand held cutting machine having a housing (1) and a drive engine, which drives a transmission including a number of transmission members (3?, 2) and driving a rotational or semi rotational cutting tool. The retarding device includes brake means (12, 17) arranged to be in close relation with the transmission and for actuating a retarding force on a transmission member (2), the brake means being arranged to automatically put a retarding force on said transmission member when the speed of rotation or the torque of rotation of said transmission member falls below a predetermined value.

Abstract: The present invention relates to a carburetor of an internal combustion engine having a manually activated start position. The carburetor includes at least a choke valve and a throttle valve both located in the carburetor's main air passage which are able to move between an open and a closed position, each valve having at least one respective lever that cooperates during the manual activation to give at least one start position of the choke and throttle valves. The carburetor further usually includes at least one thermally responsive member arranged to affect the start position. Further a handle is arranged to provide a two stage draw—lift motion to attain the start position.

Abstract: A crankcase scavenged two-stroke internal combustion engine (1) in which a piston ported air passage is arranged between an air inlet (2) and the upper part of a number of transfer ducts (3, 3?). The air inlet is equipped with a restriction valve (4), controlled by at least one engine parameter, for instance the carburetor throttle control. The air inlet extends via at least one connecting duct (6, 6?) to at least one connecting port (7, 7?) in the engine's cylinder wall (12). The connecting port (7, 7?) is arranged so that when the piston is in a top dead center configuration, it is connected with flow paths (9, 9?) embodied in the piston (13).

Abstract: A motor driven tool such as a pole hedge trimmer, a pole saw or the like includes a drive unit (11) that via a shaft tube (12) enclosing a drive shaft and being provided with a handle (16), is connected to a cutting unit (13) which is turnably secured to the shaft tube. The turnable connection is under the influence of a locking mechanism (L) which from the normal working position of the operator can be released by means of a control means (M) arranged at a distance from the locking mechanism (L) and close to the handle (16).

Abstract: The present invention relates to a carburetor of an internal combustion engine having a manually activated start position. The carburetor comprises at least a choke valve and a throttle valve both located in the carburetor's main air passage which are able to move between an open and a closed position, each valve having at least one respective lever that cooperates during the manual activation to give at least one start position of the choke and throttle valves. The carburetor further usually comprises at least one thermally responsive member arranged to affect the start position. Further a handle is arranged to provide a two stage draw—lift motion to attain the start position.

Abstract: This invention relates to a device for a pole saw for pruning trees or bushes. The pole saw comprises an elongated stiff tube extending from a drive unit to a remote chain saw head (12) and incorporates a drive shaft (14) connected to an input shaft (15) of a gear (16) arranged in the chain saw head (12). The gear is provided with an output shaft (18) on which a sprocket wheel (20) for driving a saw chain is arranged. A mass body vibration damper (23) is arranged between the gear (16) and the sprocket wheel (20).

Abstract: This invention relates to a device for a motor driven tool such as a pole hedge trimmer, a pole saw or the like. The tool comprises a drive unit that via a shaft tube is connected to a cutting unit. The cutting unit is turnably secured at the shaft tube and is movable between at least two positions. The cutting unit is provided with one or several movable cutting elements and the tool is provided with first means (33) locking the movement of the cutting elements when the cutting unit is in at least one of said positions.

Abstract: Leaf blower that is carried on the back of the operator comprising at least an engine (14) and a fan. The fan is provided with an air inlet (13) placed on the side of the fan that is facing away from the back of the operator. The air stream is passing the engine (14) on its way to the air inlet (13) so that the engine (14) is cooled.

Abstract: This invention relates to a device for a pole saw for pruning trees or bushes. The pole saw comprises an elongated stiff tube extending from a drive unit to a remote chain saw head (12) and incorporates a drive shaft (14) connected to an input shaft (15) of a gear (16) arranged in the chain saw head (12). The gear is provided with an output shaft (18) on which a sprocket wheel (20) for driving a saw chain is arranged. A mass body vibration damper (23) is arranged between the gear (16) and the sprocket wheel (20).

Abstract: Conventional leaf blowers have a supporting frame to where the different components are attached. In order to reduce the noise from the tool and protect some of the components are they provided with covers. This makes the tool heavy and complicated for the operator to use. The claimed invention is a covering casing (10) that also is the supporting structure for the different components in the tool. The casing reduces the amount of noise spread from the tool and protects the components inside the casing (10).

Abstract: Energy storing starter assembles include a hub, a pulley, and a torsion spring adapted to resiliently link the hub to the pulley. The torsion spring includes a first end portion adapted to be linked to the hub and a second end portion adapted to be linked to the pulley. The torsion spring further includes at least one resilient member with a first section including a first winding and a second section including a second winding.

Abstract: Energy storing starter assembles include a hub, a pulley, and a torsion spring adapted to resiliently link the hub to the pulley. The torsion spring includes a first end portion adapted to be linked to the hub and a second end portion adapted to be linked to the pulley. The torsion spring further includes at least one resilient member with a first section including a first winding and a second section including a second winding.

Abstract: A crankcase scavenged two-stroke internal combustion engine (1) in which a piston ported air passage is arranged between an air inlet (2) and the upper part of a number of transfer ducts (3, 3?). The air inlet is equipped with a restriction valve (4), controlled by at least one engine parameter, for instance the carburetor throttle control. The air inlet extends via at least one connecting duct (6, 6?) to at least one connecting port (7, 7?) in the engine's cylinder wall (12). The connecting port (7, 7?) is arranged so that when the piston is in a top dead center configuration, it is connected with flow paths (9, 9?) embodied in the piston (13).

Abstract: Crankcase scavenged two-stroke internal combustion engine (1), in which a piston ported air passage is arranged between an air inlet (2) and the upper part of a number of transfer ducts (3, 3?). The air inlet is equipped with a restriction valve (4), controlled by at least one engine parameter, for instance the carburettor throttle control. The air inlet extends via at least one connecting duct (6, 6?) to at least one connecting port (7, 7?) in the engine's cylinder wall (12).

Abstract: This invention relates to a motor driven tool such as a pole hedge trimmer, a pole saw or the like comprising a drive unit (11) that via a shaft tube (12) enclosing a drive shaft and being provided with a handle (16), is connected to a cutting unit (13) which is turnably secured to the shaft tube. The turnable connection is under the influence of a locking mechanism (L) which from the normal working position of the operator can be released by means of a control means (M) arranged at a distance from the locking mechanism (L) and close to the handle (16).

Abstract: The invention relates to a device for adjustably limiting the maximum speed of an engine powered hand tool controlled by a power-regulating device (11) located in the handle of the tool. The device makes it possible to optimise the speed of the engine for the job that is to be done. The device consists of a threaded shaft (15) that is moved by rotating a nut (12) and a spring (14). When a higher speed than the selected level is required, is it possible to increase the speed to the maximum speed available by pressing the power-regulating device (11) with a force that exceeds the force from the spring (14).

Abstract: Leaf blower that is carried on the back of the operator comprising at least an engine (14) and a fan. The fan is provided with an air inlet (13) placed on the side of the fan that is facing away from the back of the operator. The air stream is passing the engine (14) on its way to the air inlet (13) so that the engine (14) is cooled.