Abstract: A portable water tank assembly for a dust emitting construction machine, such as a machine for cutting concrete, stone, ceramic materials and the like may include a water container (1) and an electric pump (2) powered by a battery for pumping water from the container (1) through an outlet to the construction machine. To provide a portable water tank assembly which provides a long service life without changing battery, is easy to handle and carry and that is robust and reliable, the pump is a low pressure pump (2), of 0.1-1.5 bar, preferably of 0.3-1.2 bar, that is preferably submersible and placed inside the water container. The assembly has at least 5 liter capacity.

Abstract: The present invention relates to liquid dispensing system for a rotatable work tool (2), comprising a control valve (13), an inlet and outlet liquid guiding device (11, 15). The control valve (13) comprises a housing (18) with a rotatable drum part (19) arranged to rotate. The housing (18) comprises inlet and outlet tubes (21, 22) arranged to be connected to the liquid guiding devices (11, 15). The tubes (21, 11) have corresponding inlet and outlet openings (23) facing the drum part (19). The drum part (19) comprises a first seal (25) and a third seal (27), the seals (25, 27) running around the drum part (19). The third seal (27) has an extension (34) running partially along the first seal (25), such that a first and second volume (28, 29) are formed. Each opening (23, 24) is connected to one of the volumes, or both. At least one volume (29) enables fluid connection between the openings (23, 24) that is variable by means of the third seal (27) moving over one or more of the openings (23).

Abstract: A portable, hand-held, combustion engine powered working machine, e.g. a power cutter, chain saw or trimmer, comprising: a tool unit including a working tool; a machine unit (104) including an internal combustion engine (204) with a crankshaft (304); an assembly for supplying cleaned air and fuel to the engine, having an upstream air inlet; a fan housing (404) located in an outer end of said tool unit and having an air inlet for ambient air; a fan wheel (302) arranged in the fan housing (404); the fan wheel (302) driven by the crankshaft (304) to supply cooling air, sucked in through the air inlet to cool the engine (204); a combustion air duct (406) having a combustion air intake opening (408) located radially outside of the fan wheel (302) leads the combustion air to the assembly for supplying cleaned air and fuel to the engine via a possible air filter (402).

Abstract: The present invention relates to liquid dispensing system for a rotatable work tool (2), comprising a control valve (13), an inlet and outlet liquid guiding device (11, 15). The control valve (13) comprises a housing (18) with a rotatable drum part (19) arranged to rotate. The housing (18) comprises inlet and outlet tubes (21, 22) arranged to be connected to the liquid guiding devices (11, 15). The tubes (21, 11) have corresponding inlet and outlet openings (23) facing the drum part (19). The drum part (19) comprises a first seal (25) and a third seal (27), the seals (25, 27) running around the drum part (19). The third seal (27) has an extension (34) running partially along the first seal (25), such that a first and second volume (28, 29) are formed. Each opening (23, 24) is connected to one of the volumes, or both. At least one volume (29) enables fluid connection between the openings (23, 24) that is variable by means of the third seal (27) moving over one or more of the openings (23).

Abstract: A portable water tank assembly for a dust emitting construction machine, such as a machine for cutting concrete, stone, ceramic materials and the like, said assembly comprising a water container and an electric pump powered by a battery for pumping water from the container through an outlet to the construction machine. To provide a portable water tank assembly which provides a long service life without changing battery, is easy to handle and carry and that is robust and reliable, the pump is a low pressure pump, of 0,1-1,5 bar, preferably of 0,3-1,2 bar, that is preferably submersible and placed inside the water container; and said assembly has at least 5 liter capacity. Preferably the hood member has a first compartment for a battery for delivering power to the pump and a battery located in the compartment, and it may have a second compartment for a battery charger and a third compartment for a spare battery.

Abstract: A portable water tank assembly for a dust emitting construction machine, such as a machine for cutting concrete, stone, ceramic materials and the like, said assembly comprising a water container (1) and an electric pump (2) powered by a battery for pumping water from the container (1) through an outlet to the construction machine. To provide a portable water tank assembly which provides a long service life without changing battery, is easy to handle and carry and that is robust and reliable, the pump is a low pressure pump (2), of 0.1-1.5 bar, preferably of 0.3-1.2 bar, that is preferably submersible and placed inside the water container (1); and said assembly has at least 5 liter capacity. Preferably the hood member (3) has a first compartment (5) for a battery for delivering power to the pump (2) and a battery (6) located in the compartment (5), and it may have a second compartment (11) for a battery charger (12) and a third compartment (13) for a spare battery.

Abstract: A power cutter powered by a single cylinder internal combustion engine, the power cutter including: a tool unit having at least one tool, which can be rotated about an axis of rotation; a drive unit including an engine, the engine including an engine cylinder having a cylinder bore centerline, a piston, a crankshaft with a crankshaft axis of rotation and a flywheel, the crankshaft running in a counter clockwise direction as seen towards the flywheel; a cutter arm attached to the drive unit in its inner end and its outer end carrying the tool unit, a centerline of the cutter arm essentially follows a connection line between the axis of rotation of the tool and the axis of rotation of the crankshaft.

Abstract: A power cutter powered by a single cylinder internal combustion engine, the power cutter including: a tool unit having at least one tool, which can be rotated about an axis of rotation; a drive unit including an engine, the engine including an engine cylinder having a cylinder bore centerline, a piston, a crankshaft with a crankshaft axis of rotation and a flywheel, the crankshaft running in a counter clockwise direction as seen towards the flywheel; a cutter arm attached to the drive unit in its inner end and its outer end carrying the tool unit, a centerline of the cutter arm essentially follows a connection line between the axis of rotation of the tool and the axis of rotation of the crankshaft.

Abstract: A portable, hand-held, combustion engine powered working machine, e.g. a power cutter, chain saw or trimmer, comprising: a tool unit including a working tool; a machine unit (104) including an internal combustion engine (204) with a crankshaft (304); an assembly for supplying cleaned air and fuel to the engine, having an upstream air inlet; a fan housing (404) located in an outer end of said tool unit and having an air inlet for ambient air; a fan wheel (302) arranged in the fan housing (404); the fan wheel (302) driven by the crankshaft (304) to supply cooling air, sucked in through the air inlet to cool the engine (204); a combustion air duct (406) having a combustion air intake opening (408) located radially outside of the fan wheel (302) leads the combustion air to the assembly for supplying cleaned air and fuel to the engine via a possible air filter (402).

Abstract: A portable water tank assembly for a dust emitting construction machine, such as a machine for cutting concrete, stone, ceramic materials and the like, said assembly comprising a water container (1) and an electric pump (2) powered by a battery for pumping water from the container (1) through an outlet to the construction machine. To provide a portable water tank assembly which provides a long service life without changing battery, is easy to handle and carry and that is robust and reliable, the pump is a low pressure pump (2), of 0.1-1.5 bar, preferably of 0.3-1.2 bar, that is preferably submersible and placed inside the water container (1); and said assembly has at least 5 liter capacity. Preferably the hood member (3) has a first compartment (5) for a battery for delivering power to the pump (2) and a battery (6) located in the compartment (5), and it may have a second compartment (11) for a battery charger (12) and a third compartment (13) for a spare battery.