Abstract: A braking device is provided for braking or immobilising a shaft in a work tool, particularly a saw chain, hedge shears or the like. The braking device has a brake band that at surrounds at least part of an area of the shaft, in which the brake band forms an effective plane, and two brake band holders with which the brake band may be placed under tension and released, in which at least one brake band holder is constructed movably, and in which a movable brake band holder is arranged with little space requirement in the braking device. At least one brake band holder is mounted outside the effective plane of the brake band so that it is rotatable about the axis of rotation or about an approximately parallel axis or shaft and/or so that it is able to be moved in a linear direction on a plane that is approximately orthogonal with the shaft.

Abstract: In order to provide a carburettor unit for an internal combustion engine, which can be used in particular for motor-driven small apparatus, including a throttle unit contained in a housing which has a throttle valve which executes a rotary movement for controlling the power of the internal combustion engine, wherein the rotary movement can be initiated by means of a control cable via a throttle valve shaft and wherein the control cable includes a control cable casing and a pull cord according to the design of a Bowden cable, which has a simple receptacle of a control cable and requires a small space for connection to the carburettor unit, it is proposed that to initiate the rotary movement in the throttle valve shaft there is provided a lever element which is disposed on the throttle valve shaft and which can be actuated by means of the pull cord and wherein a retaining device is further provided for receiving the control cable casing, which is also arranged on the throttle valve shaft.

Abstract: In order to provide a two-stroke motor, in particular for a portable, hand-guided working device with a combustion space formed in a cylinder and a piston guided in the cylinder so that it performs a lifting movement, at least one transfer port is provided which is formed at least from a combustion-space-side opening section, a rising section and a crankcase-space-side inlet section. The opening section is connected to the inlet section by the rising section arranged approximately parallel to the piston barrel. The motor has a small flow resistance because of its geometric design, despite maintaining small opening windows into the combustion space, and allows simple casting production. The transfer port forms in the inlet section a whole port which passes in a single-flow manner into the rising section and is divided by a division at least into a first partial port and a second partial port at least in the upper region of the rising section adjoining the opening section.

Abstract: In order to make available an exhaust gas system for a combustion engine with an external housing, which contains at least one rear shell and one front shell, and with a catalyst chamber, in which at least one catalyst element is arranged, and with an exhaust gas duct, from which exhaust gas is conveyed from the catalyst chamber, said exhaust gas system including few components and being able to be produced cost-effectively and wherein harmful thermal stresses in the components of the exhaust gas system are largely avoided, the catalyst chamber also forms the exhaust gas duct. The catalyst chamber has at least two chamber halves, and the exhaust gas duct is provided materially uniform and in one piece in at least one chamber half.

Abstract: A chainsaw includes an internal combustion engine with a fuel-air mixture inlet and a carburettor with a fuel-air mixture outlet disposed in the direction of flow of a fuel-air mixture in front of the fuel-air mixture inlet. A fuel-air mixture channel is provided between the fuel-air mixture outlet and the fuel-air mixture inlet. A lubricant guide is provided along components to be lubricated, such that the lubricant circuit is connected particularly effectively to the fuel supply of the internal combustion engine. A removal device for fuel with a recess which receives fuel and supplies the lubricant guide is provided between the fuel-air mixture outlet and the fuel-air mixture inlet.

Abstract: In order to provide a suction device for a cyclone filter of a hand-guided work apparatus, in particular a chain saw, an angle grinder or the like, including a blower which is located in a housing and a starting unit with a cable drum which is rotatably mounted about an axis, wherein ambient air sucked in with dirt particles is divided by the cyclone filter into a first air stream which is largely freed from dirt particles and into a second air stream loaded with dirt particles. The housing has an inlet and an outlet for the second air stream, which has a simple configuration and a good suction performance for air laden with dirt particles. The blower is mounted rotatably about an axis which is arranged coaxially to the cable drum axis and the housing is designed with a channel which is connected to the inlet and opens in the region of the cable drum axis, whereby the second air stream is effectively guided from the cyclone filter through the channel into the outlet.

Abstract: The present invention relates to an exhaust device for internal-combustion-engine-driven small appliances. The exhaust device includes a housing which has at least one exhaust inlet opening and at least one exhaust outlet opening, and a flame resonator for suppressing flames emerging from the exhaust device. The flame resonator is arranged inside the housing and is configured as a channel-like resonator cavity into which the exhaust gas flows at least partly, whereby flames emerging from the housing can be avoided in the exhaust gas.

Abstract: The invention relates to a work implement including a drive which can be started by a cable pull starter, wherein the cable pull starter has a starter handle which is located in a holder in a rest position and which can be removed from the holder by a user for starting the drive. The work implement also includes a starting brake for a tool which prevents tool movements hazardous to the user directly after starting the drive, wherein a tripping mechanism disposed on the holder is provided for the starting brake, which by removing the starter handle from the holder automatically tightens the starting brake.

Abstract: In order to improve a pull-rope type starting device (100) for an one internal combustion engine, having at least one rope drum (4) which is rotatably held in a housing (1), wherein said starting device, for generating the drive torque for the motor shaft by means of a starter handle, is rotatable by way of a starter rope or pull-rope, and by way of an elastic coupling element (6) connected to a ratchet-type engaging element, by means of which the drive torque can be transmitted to the motor shaft, such that the elastic coupling element (6) or a part thereof can simply, effectively and reliably be prevented from entering a design-related gap between the rope drum (4) and the engaging element (5), it is proposed that a bushing or sleeve (8) be provided in this gap.

Abstract: The invention relates to a cutting device arrangement including a generator and a spray device in the region of a cutting tool whereby liquid is sprayed for binding cutting residue blown up during the cutting process. The cutting device also includes a liquid supply device whereby the liquid can be supplied to the spray device. An electric pump is provided as part of the spray device whereby the liquid can be sprayed under pressure, wherein the electric pump is electrically connected to the generator.

Abstract: To improve an intake device (100) for a handheld tool implemented having an air cleaner, particularly for a chainsaw, a cutting-off grinder, or the like, which comprises an internal combustion engine (25) and a drive unit (20) for the attachment, the air cleaner cleaning combustion air, which is charged with dirt particles, for the engine (25), in that a centrifugal separator (30) separates the combustion air into at least one first air flow (31), which is freed from dirt particles as much as possible, and a second air flow (32), which is loaded with dirt particles, in particular to cause higher efficiency of the intake device, it is suggested that a blower (10) be situated on the drive unit (20), which sucks in the second air flow (32), by which cooling of the drive unit (20) is caused.

Abstract: The invention pertains to a handheld implement, in particular a portable chainsaw (100), with a handle housing part (12) that contains at least one carrying handle (10), and with at least one motor housing part (16) that carries a drive unit (14) and is connected to the handle housing part (12) by means of an antivibration system that consists of at least one vibration-reducing element (18). The invention proposes an antivibration system of this type, in which the above-mentioned problems are solved due to the fact that an exchange of the vibration-reducing elements can be eliminated, wherein the antivibration system is still able to fulfill the individual requirements of the operator and the machine. This is achieved due to the fact that the at least one vibration-reducing element (18) is realized such that it can be adjusted with the aid of a tool or without requiring a tool.

Abstract: The invention relates to a hand-operated tool with handle (1) with a handle section (2) on the user side and with a foot section (3) arranged on the bottom side of the handle section (2) and with a detachable one-piece upper handle shell (8) that covers at least substantially the handle section (2) on the user side and the foot section (3) on the bottom or ground side.

Abstract: The invention entails a handle for a pull-rope starter of a drive motor, especially of a chain saw. The invention includes at least one handle section, at least one fastening section for a starter rope, and a damping for smoothing out force peaks produced in the handle during the starting of the drive motor. The damping is arranged in the handle section.

Abstract: In order to improve a pull-rope type starting device (100) for an one internal combustion engine, having at least one rope drum (4) which is rotatably held in a housing (1), wherein said starting device, for generating the drive torque for the motor shaft by means of a starter handle, is rotatable by way of a starter rope or pull-rope, and by way of an elastic coupling element (6) connected to a ratchet-type engaging element, by means of which the drive torque can be transmitted to the motor shaft, such that the elastic coupling element (6) or a part thereof can simply, effectively and reliably be prevented from entering a design-related gap between the rope drum (4) and the engaging element (5), it is proposed that a bushing or sleeve (8) be provided in this gap.

Abstract: The invention described here entails a work device (such as an abrasive cutting-off machine) that can be comfortably guided in a work position and is stable in a turned-off position without components relative to safety being exposed to increased wear. In particular, the work device has a foot unit having at least one rolling means and at least one support. The foot unit makes it possible to guide the abrasive cutting-off machine on the at least one rolling means in the work position and to set it on the support in the turned-off position.

Abstract: In order to make available a clutch drum, which is connected to a toothed wheel, in particular a toothed wheel designed as a chain wheel for a motor saw, wherein a non-detachable connection of the toothed wheel and clutch drum is associated with a positive connection, and wherein the connection of the clutch drum and toothed wheel is a low cost, durable and reliable connection, it is proposed that the clutch drum is provided with a recess, wherein a rigid connection is provided between the toothed wheel and the clutch drum, which is welded from inside the clutch drum.

Abstract: In order to improve a limiter cap (300; 300?) for limiting the adjustability of at least two set screws or valves (200), which are arranged side by side, with each set screw or valve (200) including at least one retaining nose or stop leg (240), extending in the transition area between the screw head (210) and the screw needle or valve needle (220) in a ring shape around the external circumference of the screw needle or valve needle (220), in particular for limiting the adjustment of the fuel flow through a carburetor (400; 400?), in such a way that inadvertently pushing the limiter cap onto the screw needle thus prematurely blocking said screw needle, already at the time when the (basic) carburetor adjustment takes place, is safely prevented, it is proposed that the limiting cap (300; 300?) is attached to each of the set screws (200) in particular in a way so as to be self-attaching, and/or in particular such that the limiter caps (300; 300?) engage each other with locking action, and/or without any further

Abstract: A medium pump for a motor includes a pump case with a pump cylinder and a pump piston positioned displacaebly in the pump cylinder in the direction of a pump axle. The pump piston rotates about the pump axle by running off an oblique control surface and realizes axial pump movements against the pressure of a first spring. A pump lift adjusting device is removably positioned in a guide placed transversely to the pump axle and fixedly connected with the pump case.

Abstract: A starting device is provided for an internal combustion engine, in particular a pull-rope type starting device for a two-stroke or four-stroke motor. The starting device includes a pulley or rope drum which is rotatably held in a housing, and generates the drive torque for a motor shaft by means of a starter handle or pull handle. The starting device is rotatable by way of a load transfer means, in particular by way of a starter rope or pull-rope, and by way of an elastic coupling element, in particular by way of a spiral spring. A ratchet-type engaging element is provided, by means of which the drive torque can be transmitted to the motor shaft, such that not only is overloading of the elastic coupling element prevented in a safe and reliable manner, but also, even if the elastic coupling element should break, the starting still functions, and the internal combustion engine can still be started.