Abstract: An antivibration device is mounted between a motor unit (1) having an internal combustion engine (2) and a vibration-insulated unit (3) of a portable handheld work apparatus (4) such as a motor-driven chain saw, cutoff machine, suction/blower apparatus or the like. The antivibration device (5) includes a vibration damper (6) made of foamed elastic material (7).

Abstract: A mold for a plastic grip of a portable tool has two halves with depressions forming the negative. The base body has a top grip extending, when mounted, across the topside of the housing perpendicularly to a longitudinal axis of the tool and a lateral grip connected to the top grip extending therefrom, when mounted, laterally downwardly. The top grip has a first end and the lateral grip has a second end for connecting to the housing. Top and lateral grips have identical elliptical cross-sections rotated to one another in the circumferential direction of the grip by an angle of rotation. Cross-sections have a first diameter larger than a second diameter. Mold depressions have recesses for molding elongate, raised portions in the longitudinal direction. Recesses are adjacent circumferentially and extend spirally. Separation surfaces of mold halves are positioned in a longitudinal center plane of a recess adjacent the first diameter.

Abstract: An antivibration element (1) is especially for a portable handheld work apparatus such as a motor-driven chain saw or a brushcutter. The antivibration element includes a coil spring (2) and at least one guide. An end section (7, 8) of the coil spring (2) is fixed to the guide. In order to provide a progressive characteristic line of the coil spring (2) in a simple way, the coil spring (2) has a transition section (11, 12), which borders at the end section (7, 8) and is guided with play on the guide.

Abstract: The invention relates to a carburetor arrangement for an internal combustion engine (1) which drives a work apparatus. The engine (1) has an intake channel (3) leading through a carburetor (2). The intake channel (3) includes an intake opening (4) on the side of the carburetor (2) facing away from the engine (1). A baffle wall (5) is provided and covers the intake opening (4) at least partially. The baffle wall (5) is mounted transversely to the longitudinal axis (6) of the intake channel (3) at a spacing to the intake opening (4). The baffle wall (5) and the intake opening (4) define a baffle enclosure (7) disposed therebetween. At least a first component part (8) of the baffle wall (5) is inclined with respect to the longitudinal axis (6) of the intake channel (3) in such a manner that fuel droplets (9), which exit from the intake channel (3) and which impinge on the first component part (8) of the baffle wall (5), form a fuel film (10).

Abstract: A manually guided implement having an internal combustion engine and a carburetor for supplying the engine with a fuel/air mixture is provided. A combustion air stream is drawn in through the carburetor by the engine. A warming medium heated up by the engine can be passed along the outer surfaces of the carburetor separate from the combustion air stream.

Abstract: A manually guided, motor-driven implement is provided that has a housing for a motor, especially an internal combustion engine, that drives a working tool of the implement. In order for a power chain saw to mount a handle on the housing of the motor in a vibration dampening manner such that due to the mounting a structurally prescribed dampening frequency range is effected, one or more hydraulic mounts are disposed between the handle and the motor of the power chain saw.

Abstract: An internal combustion engine for a manually guided implement is provided and has a cylinder, a reciprocating piston that is longitudinally displaceable in the cylinder, a rotatable crankshaft and a connecting rod for connecting the piston and the crankshaft. By means of a clutch, a tool that is to be driven can be connected to the internal combustion engine. To improve engine operation and at the same time keep a low overall weight, a rotary oscillation eliminator is provided on the engine side of the clutch and in the direction of flow of power from the internal combustion engine to the tool.

Abstract: The invention relates to a carburetor arrangement for an internal combustion engine (1) which drives a work apparatus. The engine (1) has an intake channel (3) leading through a carburetor (2). The intake channel (3) includes an intake opening (4) on the side of the carburetor (2) facing away from the engine (1). A baffle wall (5) is provided and covers the intake opening (4) at least partially. The baffle wall (5) is mounted transversely to the longitudinal axis (6) of the intake channel (3) at a spacing to the intake opening (4). The baffle wall (5) and the intake opening (4) define a baffle enclosure (7) disposed therebetween. At least a first component part (8) of the baffle wall (5) is inclined with respect to the longitudinal axis (6) of the intake channel (3) in such a manner that fuel droplets (9), which exit from the intake channel (3) and which impinge on the first component part (8) of the baffle wall (5), form a fuel film (10).

Abstract: An antivibration device is mounted between a motor unit (1) having an internal combustion engine (2) and a vibration-insulated unit (3) of a portable handheld work apparatus (4) such as a motor-driven chain saw, cutoff machine, suction/blower apparatus or the like. The antivibration device (5) includes a vibration damper (6) made of foamed elastic material (7).

Abstract: The invention relates to a carburetor arrangement for an internal combustion engine (1) which drives a work apparatus. The engine (1) had an intake channel (3) leading through a carburetor (2). The intake channel (3) includes an intake opening (4) on the side of the carburetor (2) facing away from the engine (1). A baffle wall (5) is provided and covers the intake opening (4) at least partially. The baffle wall (5) is mounted transversely to the longitudinal axis (6) of the intake channel (3) at a spacing to the intake opening (4). The baffle wall (5) and the intake opening (4) define a baffle enclosure (7) disposed therebetween. At least a first component part (8) of the baffle wall (5) is inclined with respect to the longitudinal axis (6) of the intake channel (3) in such a manner that fuel droplets (9), which exit from the intake channel (3) and which impinge on the first component part (8) of the baffle wall (5), form a fuel film (10).

Abstract: The invention relates to a portable handheld work apparatus including a chain saw, a vacuum/blower apparatus or the like. The work apparatus has a handle (2) for carrying and guiding the work apparatus (1). Thumb supports (4, 5) are provided on both sides with respect to the longitudinal axis (3) of the handle (2).

Abstract: A manually guided implement having an internal combustion engine and a carburetor for supplying the engine with a fuel/air mixture is provided. A combustion air stream is drawn in through the carburetor by the engine. A warming medium heated up by the engine can be passed along the outer surfaces of the carburetor separate from the combustion air stream.

Abstract: A vibration damper is disposed between two components (2, 3) of a portable handheld work apparatus (4). The vibration damper is held especially between a housing (6), which holds an internal combustion engine (5), and a handle (7) which is fixed on the housing (6) for guiding the work apparatus (4). The vibration damper includes a coil spring (9) and respective attachment elements (11, 12) at the ends (10, 13) of the coil spring. A coupling member (17) is provided to ensure that the work apparatus can be guided notwithstanding a break of a coil spring. The coupling member (17) projects through the coil spring (9) and bridges the axial distance (16) between the attachment elements (11 and 12). The coupling member (17) is connected to each attachment element (11, 12) so that it cannot separate therefrom.

Abstract: An anti-vibration element is provided for disposition between a motor unit and a handle unit of a manually guided implement. The anti-vibration element includes a sleeve-shaped, elastic main body as a vibration damper, with one end portion of the main body being adapted to be disposed in a receiving recess of the motor unit, and the other end portion being adapted to be disposed in a receiving recess of the handle unit. Respective plugs are disposed in the end portions of the main body for non-detachably holding such end portions in the receiving recesses. A cable that serves as a coupling element for preventing separation of the plugs is provided and spans an axial spacing between the plugs and extends through the main body. Each of the end regions of the cable has a respective fitting, an axially inwardly facing end face of each such fitting positively engaging behind an edge of an adjacent one of the handle unit and the motor unit.

Abstract: The invention relates to a vibration damper between a housing (4), which holds an internal combustion engine, and a handle (3) fixed on the housing (4). The handle (3) is for holding and guiding the motor-driven chain saw (2) during use thereof. The vibration damper (1) is a coil spring (5) which is fixed at a first end (10) thereof with an attachment element (7) to the handle (3) and, at a second end (20), the coil spring is fixed with a further attachment element (30) to the housing. A part turn of the end (10, 20) of the coil spring (5) is held form-tightly to the attachment element (7, 30) in the direction of its longitudinal center axis (25). To provide a torsion-free assembly of the coil spring, it is provided that the coil spring (5) can be assembled from one of its ends (20) between the handle (3) and the housing (4) and be secured at least at one of its ends (20) to the attachment element (30) against a rotational movement in the peripheral direction.

Abstract: An exhaust gas muffler for an internal combustion engine of a portable, hand-guided working tool has a housing having an exhaust gas inlet, and exhaust gas outlet, and an outlet space, wherein the exhaust gas outlet opens into the outlet space. An outlet opening is provided downstream of the outlet space and has wall elements directing the exhaust gas flow in the exit flow direction. A rebound wall is positioned transverse to the exhaust gas outlet and delimits the outlet space while providing a connecting slot into the outlet opening. The connecting slot is spaced at a distance from the outer wall of the housing that extends substantially parallel to the rebound wall. A first ramp is positioned perpendicularly to the connecting slot and slants upwardly from the rebound wall to the outlet opening. A second ramp extends in a direction of longitudinal extension of the connecting slot from an end of the insertion slot opposite the first ramp to the edge of the first ramp opposite the connecting slot.

Abstract: A portable, hand-guided working tool has a drive motor and a motor housing in which the drive motor is housed. The motor housing has a front side and a rear side when viewed in the direction of the longitudinal center axis of the working tool. A tool member is connected to the front side of the motor housing and extends forwardly in the direction of the longitudinal center axis. The tool member is driven by the drive motor. The rear grip is connected by vibration damping elements to the rear side of the motor housing and extends rearwardly in the direction of the longitudinal center axis. An abutment device includes a first abutment member connected to the motor housing and positioned between the rear end and the rear grip and includes a second abutment member connected to the rear grip and cooperating with the first abutment member for limiting a relative movement between the motor housing and the rear grip.

Abstract: When signals are transmitted via an integrated services digital network (NET), the transmission capacity of the individual channels is predetermined. Two independent integrated services digital networks (NET) can be interconnected, for example via a radio link. However the radio link only has a limited number of channels available, and their transmission capacity is not predetermined. Before the signals of the first integrated services digital network (NET1) are converted into radio signals, the signals are routed to an apparatus (EIN) where they are compressed and divided. The apparatus (EIN) comprises a demultiplexer (DMUX) for demultiplexing the signals to the individual bearer and signalling channels, a switching unit (S) for separately routing signals to be compressed, e.g. voice signals, and signals not to be compressed, e.g.

Abstract: The invention relates to a digital method of detecting pulses of short duration and an arrangement for implementing the method. A threshold value is generated by means of a statistical procedure which is common in radar engineering, by means of which short pulses to be detected can be differentiated as opposed to long pulses. The method includes sorting a predeterminable number of temporally consecutive signal samples by amplitude and creating a ranking of the signal samples. An associated amplitude value for a predeterminable rank within the ranking is determined and multiplied by a predeterminable weighting factor (k) so that an amplitude threshold value (SW) is generated. All signal samples whose amplitude is greater than the amplitude threshold value (SW) are then marked with a marking signal.

Abstract: The invention relates to a venting valve for a fuel tank and includes a valve seat and a valve body which lies in sealing contact engagement therewith. The sealing surface of the valve seat faces toward the interior space of the tank in order to ensure an operationally-reliable venting even after long periods of operation without the danger of an outflow of fuel. The opening movement of the valve body is directed toward the interior space of the tank. A fine-porous air filter made of sinter material is mounted forward of the valve seat when viewed in flow direction toward the interior of the tank.