Abstract: The invention describes a blower (1) comprising: a volute (10) for conveying air, a first tube (15) connected to the conveying volute (10), a second tube (50) adapted for being at least partially inserted in the first tube (15) and for sliding inside it along a sliding direction (A), and a fixing system of the second tube (50) to the first tube (15) in at least two positions, one of which is extracted and one is retracted.

Abstract: A method is described for estimating, by measurements taken by an inductive sensor, the time for which an endothermic motor of a tool has operated at predetermined rotating speeds, and an apparatus implementing the method also described. The method in particular includes cyclically measuring, at a pre-set sampling period, an overall time interval by starting at the beginning of the measuring of the overall time interval when a first variation peak of the electromagnetic field is sensed and terminating the measuring of the overall time interval when a last variation peak of the electromagnetic field is sensed. The first and the last peaks are the start and tail ends of a sequence of peaks having a predetermined number of successive peaks, the number of peaks being positive, whole, at least equal to six and a least common multiple of two and three.

Abstract: A kit is described for the conversion of a blower into an atomizer. The kit includes: a tank (45) adapted to contain a liquid, a tubular body adapted to be fixed to the blower and provided with an inlet mouth and an outlet mouth, a diffuser device associated with the tubular body and provided with a liquid dispensing nozzle, a pressurization conduit which places in fluid communication an internal volume of the tubular body placed between the inlet mouth and the liquid dispensing nozzle with a top portion of the tank, and a dispensing conduit which places in fluid connection the dispensing nozzle of the diffuser device with a lower portion of the tank.

Abstract: A two-stroke internal combustion engine includes:—a base;—a head, fixed to the base, and having a cylindrical cavity;—a piston slidable in the cylindrical cavity, to define a combustion chamber and a pumping chamber, and movable in the cylindrical cavity between a bottom and a top dead center;—a transfer duct having an inlet mouth in fluid communication with the pumping chamber, and an outlet mouth in fluid communication with the combustion chamber;—an exhaust duct having an inlet mouth in fluid communication with the combustion chamber,—a crank shaft partially housed in the pumping chamber;—a connecting rod connecting the piston to the crank shaft;—a movable partition housed inside the pumping chamber operatively connected to the crank shaft to occlude the transfer duct inlet mouth and to put in fluid communication the transfer duct inlet mouth with the pumping chamber.

Abstract: Described herein is a work tool (100) comprising: a motor (125) provided with a drive shaft (130), a casing (195) containing the motor (125) and provided with at least one inlet opening (235) and with at least one outlet opening (240), an implement (135) positioned outside the casing (195) and kinematically connected with the drive shaft (130), and a fan (245) kinematically connected to the drive shaft (130) and able to generate a flow of air from the inlet opening (235) towards the outlet opening (240) of the casing (195) passing in heat exchange relationship with the motor (125), wherein said fan (245) is contained inside the casing (195) in a space located between the motor (125) and the implement (135).

Abstract: A work equipment (10) is described comprising a pole (20) for supporting a work apparatus (W), wherein the work apparatus (W) comprises: a. a work tool (55), b. a motor (45) adapted to activate the work tool (55), c. a casing (60) rigidly fixed to one end of the pole (20), and adapted to contain the motor (45), characterized in that the work equipment (10) comprises a damper element (85) interposed between the casing (60) and the pole (20).

Abstract: A work equipment (10) is described, comprising: —a pole (20); —a work apparatus (W) fixed to a first end of the pole (20), comprising a work tool (30), —a support body (45), fixed to a second end of the pole (20), for housing a power supply battery (P) operatively connected to the work apparatus (W), said power supply battery (P) being removably associated with the support body (45), characterized in that a damper element (95) is positioned between the support body (45) and the power supply battery (P).

Abstract: A two-stroke internal combustion engine includes:—a base;—a head, fixed to the base, and having a cylindrical cavity;—a piston slidable in the cylindrical cavity, to define a combustion chamber and a pumping chamber, and movable in the cylindrical cavity between a bottom and a top dead center;—a transfer duct having an inlet mouth in fluid communication with the pumping chamber, and an outlet mouth in fluid communication with the combustion chamber;—an exhaust duct having an inlet mouth in fluid communication with the combustion chamber,—a crank shaft partially housed in the pumping chamber;—a connecting rod connecting the piston to the crank shaft;—a movable partition housed inside the pumping chamber operatively connected to the crank shaft to occlude the transfer duct inlet mouth and to put in fluid communication the transfer duct inlet mouth with the pumping chamber.

Abstract: Described herein is a work tool (100) comprising: a motor (125) provided with a drive shaft (130), a casing (195) containing the motor (125) and provided with at least one inlet opening (235) and with at least one outlet opening (240), an implement (135) positioned outside the casing (195) and kinematically connected with the drive shaft (130), and a fan (245) kinematically connected to the drive shaft (130) and able to generate a flow of air from the inlet opening (235) towards the outlet opening (240) of the casing (195) passing in heat exchange relationship with the motor (125), wherein said fan (245) is contained inside the casing (195) in a space located between the motor (125) and the implement (135).

Abstract: A power group includes: an engine, and a shoulder support for the engine. The shoulder support includes: a support frame adapted for supporting the engine, the support frame having an L-shape and a vertical first portion and an horizontal second portion cantilevered associated with the first portion and to which the engine is connected at the top of the horizontal second portion to be supported thereon; a wearable framework connected to the support frame, and a damper element interposed between the support frame and at least one element of which the wearable framework is made up. A first element, of which the wearable framework is made up, includes a lumbar support and the damper element includes a first damper interposed between the lumbar support and the support frame.

Abstract: The invention describes a blower (1) comprising: a volute (10) for conveying air, a first tube (15) connected to the conveying volute (10), a second tube (50) adapted for being at least partially inserted in the first tube (15) and for sliding inside it along a sliding direction (A), and a fixing system of the second tube (50) to the first tube (15) in at least two positions, one of which is extracted and one is retracted.

Abstract: A two-stroke internal combustion engine includes: a piston-cylinder group defining a combustion and a pumping chamber, the piston mobile in the cylinder between a bottom dead center where the combustion chamber's volume is maximum and the pumping chamber's volume is minimum, and a top dead center, where the combustion chamber's volume is minimum and the pumping chamber's volume is maximum. The engine also includes an intake conduit communicating with the pumping chamber, an exhaust conduit communicating with the combustion chamber, at least a pair of transfer conduits allowing communication between the pumping and combustion chambers, and at least two primary channels in the piston, individually provided with an inlet facing onto the exhaust conduit and an outlet facing on a respective transfer conduit at least when the piston is at the top dead center. A lateral surface of the piston includes a lowering where the primary channels inlets are located.

Abstract: A cutting tool includes: a loop-wound chain wound about at least a drive crown activated in rotation by a motor, a lubricating circuit of the chain provided with a tank of lubricating fluid, a pump drawn by the motor and having an aspirating conduit of the fluid provided with an aspirating mouth located internally of the tank, and a delivery conduit provided with an outlet mouth located in proximity of the chain, a sensor able to detect the lubricating fluid in the lubricating circuit.

Abstract: Herein described is a two-stroke internal combustion engine (100), comprising: a cylinder (135) having a pre-set central axis (B); a piston (145) slidably coupled to the cylinder (135) and suitable to divide the interior volume thereof into two distinct chambers, including a combustion chamber (150) and a pumping chamber (155); an intake duct (160) communicating with the pumping chamber (155); an exhaust duct (170) communicating with the combustion chamber (150); and at least one scavenging duct (180) suitable to place the pumping chamber (155) in communication with the combustion chamber (150); wherein said scavenging duct (180) comprises a terminal portion (190) leading to the combustion chamber (150) which extends with configuration diverging from an inlet section (200) up to an outlet section (205) obtained on a lateral surface of the cylinder (135).

Abstract: Shoulder support for a motor includes: a back-plate which is adapted for being associated with the back of an operator through shoulder straps and includes a shaped body to contact with the back of the operator to which a frame is fixed, the frame being substantially L-shaped and includes a first portion, fixed to the back-plate, and a second portion undercut with respect to the first portion and comprising a through opening with substantially vertical through axis, the motor being connected at the top the of second portion; a connection body adapted for being rigidly connected to the motor; and a resilient support element adapted for connecting the connection body to the frame in a floating manner inside a seat defined by the through opening. The resilient support element includes a plurality of springs, having axes, which lay on a plane adapted for being arranged transversally to a vertical direction.

Abstract: A method for controlling the operation of a spark ignition internal combustion engine is described. The engine includes: a combustion chamber, an intake duct for placing the combustion chamber in communication with the external, a throttle valve arranged inside the intake duct, a carburetor for introducing fuel into the intake duct to form an air/fuel mixture to be intaken into the combustion chamber, and a spark plug arranged inside the combustion chamber to generate a spark for igniting the combustion of the air/fuel mixture. The method includes: monitoring the opening degree of the throttle valve; monitoring the speed of the engine, preventing the spark plug from generating the spark, if the opening degree of the throttle valve drops below a first opening degree threshold value and the speed of the engine is greater than a first engine speed threshold value.

Abstract: A control system for carburation of an internal combustion engine in use conditions comprising following activities: starting the engine with a value of ? equals ?0=?T; constructing a curve ci(?) of the ionization current ? as a function of the angular position a of the crank shaft; selecting, on this curve ci(?), a number of points at intervals ?? of the rotation angle a; calculating value z, equal to integral from 0 to 360° of the curve ci(?), is done by summing products ??×ci for all preselected points; interrupting supply of fuel for some cycles in order to externally modify factor ?0 and take it to value ?1; for value ?1 constructing curve ci(?) and calculating value z1; calculating difference ?z=z1?z0, and if the difference is >?zref in absolute value, intervening on carburation by increasing the quantity of fuel injected in a case of a positive difference (lean mixture) and by reducing the quantity of fuel injected in a case of a negative difference (rich mixture).

Abstract: A power group includes: an engine, and a shoulder support for the engine. The shoulder support includes: a support frame adapted for supporting the engine, the support frame having an L-shape and a vertical first portion and an horizontal second portion cantilevered associated with the first portion and to which the engine is connected at the top of the horizontal second portion to be supported thereon; a wearable framework connected to the support frame, and a damper element interposed between the support frame and at least one element of which the wearable framework is made up. A first element, of which the wearable framework is made up, includes a lumbar support and the damper element includes a first damper interposed between the lumbar support and the support frame.

Abstract: Shoulder support for a motor includes: a back-plate which is adapted for being associated with the back of an operator through shoulder straps and includes a shaped body to contact with the back of the operator to which a frame is fixed, the frame being substantially L-shaped and includes a first portion, fixed to the back-plate, and a second portion undercut with respect to the first portion and comprising a through opening with substantially vertical through axis, the motor being connected at the top the of second portion; a connection body adapted for being rigidly connected to the motor; and a resilient support element adapted for connecting the connection body to the frame in a floating manner inside a seat defined by the through opening. The resilient support element includes a plurality of springs, having axes, which lay on a plane adapted for being arranged transversally to a vertical direction.

Abstract: A two-stroke internal combustion engine includes: a piston-cylinder group defining a combustion and a pumping chamber, the piston mobile in the cylinder between a bottom dead center where the combustion chamber's volume is maximum and the pumping chamber's volume is minimum, and a top dead center, where the combustion chamber's volume is minimum and the pumping chamber's volume is maximum. The engine also includes an intake conduit communicating with the pumping chamber, an exhaust conduit communicating with the combustion chamber, at least a pair of transfer conduits allowing communication between the pumping and combustion chambers, and at least two primary channels in the piston, individually provided with an inlet facing onto the exhaust conduit and an outlet facing on a respective transfer conduit at least when the piston is at the top dead center. A lateral surface of the piston includes a lowering where the primary channels inlets are located.