Abstract: Method for driving an electromagnetic actuator in a diaphragm carburettor for control of air/fuel ratio foresees at least the following steps: associating an electromagnetic actuator in a diaphragm carburettor for control of air/fuel ratio with the current generation device in an internal combustion engine; driving the aforementioned electromagnetic actuator with pulses suitable for generating the force necessary to actuate the actuator; generating said drive pulses of the actuator in the moments when the current pulses of the aforementioned current generator are such that the maximum current is available during the cycle of the motor.

Abstract: A suction device for cleaning jobs comprising a bladed impeller (1) actuated by a motor and suitable for being housed inside a carcass provided with an inlet opening for an airflow and an outlet opening, where said impeller (1) comprises a first series of blades (2) and a second series of blades (3), which rotate firmly fixed together, coaxial to each other and distributed in a staggered manner, suitable for respectively generating an axial flow and a radial flow, said second series of blades (3) being arranged downstream of the first series of blades (2), with respect to the inlet opening, so that the air sucked in is transmitted from the first series of blades (2) to the second series of blades (3) before it reaches the outlet opening.

Abstract: A diaphragm carburettor comprises a diaphragm dosager (2) provided with a diaphragm (3) that separates a first chamber at constant pressure (4) from a second fuel dosaging chamber (5) intercepted by a valve controlled by the diaphragm, said valve being operatively connected with said diaphragm (3), the aforementioned carburettor also foreseeing an electromagnetic actuator (1) associated with said diaphragm (3) to control the opening and closing of said valve, where said actuator (1) also comprises at least one mobile coil (6) directly fixed to the diaphragm, and a fixed magnetic field generator (7) suitable for guiding said coil (6).

Abstract: An engagement system for removably connecting gardening tools and similar type devices to a power unit comprising a drive motor, the system comprising a base element suitable for being fixed to a crankcase housing the drive motor, a fastening element of a tool that can be actuated by a shaft of the drive motor, suitable for coupling with the base element, a button mounted on the base element and suitable for cooperating with a corresponding opening formed on the fastening element to removably lock the elements in an engagement position, the base element being equipped with at least one electrical safety switch actuated elastically by a rod between a first position in which the electrical safety switch is closed and prevents the operation of the drive motor, and a second position in which the electrical safety switch is open and allows the operation of the drive motor, the second position only being obtainable when the fastening element is engaged with the base element.

Abstract: A portable motorized device (1) for gardening tools having a crankcase (2), a motor (3) housed in the crankcase (2), a drive shaft (4) associated with the motor (4) and suitable for actuating a tool, control device (7) of the motor (3), where said crankcase (2) comprises two hollow substantially symmetrical portions (2a, 2b) divided vertically along a plane parallel to the rotation axis of the drive shaft (4), a grip (5; 55) with which control device (7) of the motor are associated.

Abstract: A diaphragm carburetor (1) for internal combustion engines includes a carburetor body (2,2?) provided with a feed duct (3) of an air/fuel mixture to the engine, the duct (3) being intercepted by at least one butterfly valve (20); a pumping device including a diaphragm pump (6) communicating on one side with the engine and on the other side with a fuel tank, the diaphragm pump (6) being driven by the pulses corning from the engine; a metering device including a diaphragm meter (7) adapted to keep a first chamber (13) and a second chamber (12) separate, with the meter (7) interposed, the first chamber (13) being at environmental pressure, and the second chamber (12) communicating both with the diaphragm pump (6), on the side which communicates with the tank, through a line intercepted by a valve controlled by the meter (7) itself, and with the feed duct (3) of the mixture, where the pumping device and the metering device are integrally made on a single block (5) fixed directly on one side of the carburetor b

Abstract: An internal combustion engine having a crankcase, a cylinder connected to the crankcase, a compressed air assisted fuel injection system connected between the crankcase and the cylinder, and a reciprocating piston head located in the cylinder. The improvement comprises a fuel delivery system having two carburetor sections with two interconnected rotatable shafts.

Abstract: An internal combustion engine having a combustion chamber and a fuel delivery system for delivering fuel into the combustion chamber. The fuel delivery system includes a fuel entry proximate the combustion chamber, a combustion compression wave reflection conduit connected to the combustion chamber proximate the fuel entry, and a movable member located proximate the reflection conduit for at least partially opening and closing a path through the reflection conduit.

Abstract: A method of controlling fuel injection flow in a cylinder of an internal combustion engine. A piston head of the engine is provided with a combined flow redirector and holding bowl recess extending into a top side of the piston head. A fuel injection port is provided in the cylinder in a bottom portion of a combustion chamber of the cylinder located above the top side of the piston head when the piston is at a bottom dead center position. Fuel is injected from the injection port into the recess. The step of injecting comprises injecting the fuel at a first velocity when the engine is operating at a first speed, and injecting the fuel at a second faster velocity when the engine is operating at a second faster speed.

Abstract: An internal combustion engine having a compressed air assisted fuel injection system connected between a source of compressed air and a cylinder of the engine. The compressed air assisted fuel injection system has an accumulator conduit with an injection port into the cylinder. The accumulator conduit has a length and shape to form a tuned reflection pipe to reflect a compression wave, which enters the injection port from opening of the injection port after combustion in the cylinder, and to deliver the reflected compression wave to the injection port at a predetermined period to assist in delivering fuel out of the injection port and into the cylinder.

Abstract: An internal combustion engine having a combustion chamber and a fuel delivery system for delivering fuel into the combustion chamber. The fuel delivery system includes a fuel entry proximate the combustion chamber and a combustion compression wave reflection conduit connected to the combustion chamber proximate the fuel entry. The reflection conduit comprises a variable effective reflection length.

Abstract: A two-stroke internal combustion engine having a compressed air assisted fuel injection system. The injection system has an accumulator that uses scavenged air from the crankcase as the compressed air source. The injection system has a valve connected to an exit from the accumulator. The valve is connected to a diaphragm with two diaphragm pressure chambers on opposite sides of the diaphragm. Both diaphragm pressure chambers are connected to pressure in the crankcase; one of the diaphragm pressure chambers by a flow restrictor.

Abstract: An internal combustion engine having a compressed air assisted fuel injection system. The injection system has a compressed air accumulator with a first aperture into the cylinder of the engine and a second aperture into the crankcase of the engine. The two apertures are located at opposite ends of the accumulator and the accumulator has a tube shape. The accumulator blows off pressure every time one of the ports into the cylinder is closed. The tube shape of the accumulator forms a tuned reflection pipe for a compression wave from the cylinder to generate a reflected compression wave for assisting in delivering fuel and air into the cylinder. The two apertures are adapted to be opened and closed by the piston head of the engine.

Abstract: A two-stroke internal combustion engine having a compressed air assisted fuel injection system. The injection system has an accumulator that uses scavenged air from the crankcase as the compressed air source. The injection system has a valve connected to an exit from the accumulator. The valve is connected to a diaphragm with two diaphragm pressure chambers on opposite sides of the diaphragm. Both diaphragm pressure chambers are connected to pressure in the crankcase; one of the diaphragm pressure chambers by a flow restrictor.

Abstract: Disclosed is a tunable damping system for use in reducing vibrations associated with metal cutting and tooling. The tunable damping system may be located in a boring bar, an end mill, a modular tool section or the spindle/tool holder of the metal cutting machine. The tunable damping system incorporates a damper mass, elastomeric supports, and a means to lock the mass so as to determine tuning parameters. A tuner assembly consists of sensors and a microprocessor capable of recognizing the most dynamically flexible mode of vibration. The tuner assembly is also capable, through signal processing and microprocessor controlled algorithms, to direct the operator in implementing the proper tuning adjustments of the tunable damping system.

Abstract: A light weight aerodynamically efficient cycling trailer having a single wheel is provided for towing behind a bicycle or motor cycle. The disclosed cycling trailer includes a body enclosure, an overlying lid, a light weight frame, the first end of the frame bending upwardly along the forward surface of the body enclosure to engage with a removable goose-neck tongue, the goose-neck tongue extending upwards along and attaching to the forward surface of the body enclosure, the forward end of the goose-neck tongue extending over the rear wheel of the bicycle and being coupled to a latching universal joint which couples the cycling trailer to the bicycle. The latching universal joint facilitates the easy connecting and disconnecting of the cycling trailer to a bicycle without the need of additional attachments. The cycling trailer is also provided with a removable child carrier, a hanging bar and a cargo shelf.

Abstract: Disclosed is a tunable damping system for use in reducing vibrations associated with metal cutting and tooling. The tunable damping system may be located in a boring bar, an end mill, a modular tool section or the spindle/tool holder of the metal cutting machine. The tunable damping system incorporates a damper mass, elastomeric supports, and a means to lock the mass so as to determine tuning parameters. A tuner assembly consists of sensors and a microprocessor capable of recognizing the most dynamically flexible mode of vibration. The tuner assembly is also capable, through signal processing and microprocessor controlled algorithms, to direct the operator in implementing the proper tuning adjustments of the tunable damping system.