Abstract: A chain saw includes a guide bar (1) for a saw chain, a housing (3), a sprocket wheel cover (4), and at least one stud (5) fixed on the housing (3) for threadably fastening the sprocket wheel cover (4) and the guide bar (1). The free thread end (7) of the stud (5) has a maximum usable screw-in depth (tmax) for a nut (6) to be screwed thereon. A stop (9) for the sprocket wheel cover (4) having a stop surface (10) as well as a support surface (11) for contact engaging the stop surface (10) are provided. In the mounted state of the guide bar (1), a distance (a) remains between the stop surface (10) and the support surface (11). The support surface (11) contact engages the stop surface (10) of the stop (9) when the guide bar (1) is removed and the nut (6) is tightened and the nut (6) is screwed onto the studs (5) with a stop screw-in depth. The stop (9) is configured in such a manner that the maximum usable screw-in depth (tmax) is greater than the stop screw-in depth.

Abstract: A handheld work apparatus includes a drive motor (28) to drive a tool and at least one handle (3) as well as at least one anti-vibration element (9) that includes a coil spring (10). The coil spring (10) is operatively connected to the handle (3) at one end and with the drive motor (28) at the other end. The anti-vibration element has a tear-off guard (29) which extends through the anti-vibration element (9). A centering element (21) is arranged on the tear-off guard (29) to avoid, in a simple manner, that the tear-off guard moves radially outwards.

Abstract: A work apparatus has at least one handle (12) and a drive motor (3). The handle (12) is connected to said drive motor (3) via at least one anti-vibration element (16, 17, 18, 19, 20). The anti-vibration element (18, 19) is held on a first housing part and coacts with a second housing part. To achieve good damping, the anti-vibration element (19) includes a damping section (25) having an annularly-shaped wall (35) which expands in the direction of the second housing part.

Abstract: A motor chain saw has a housing, a motor arranged in the housing, a drive pinion driven by the motor, and a guide bar connected to the housing. A saw chain is driven in circulation about the guide bar by the drive pinion. A lateral panel is arranged between the housing and an attachment section of the guide bar. The guide bar and the lateral panel each have a distance relative to the drive pinion upstream and downstream of the drive pinion when viewed in a circulating direction of the saw chain. The lateral panel has a first guide that guides the saw chain at a level of rivets of the saw chain, wherein the first guide extends approximately parallel to the plane of the guide bar.

Abstract: A manually guided implement, such as a power saw, a cut-off machine, or the like, having a drive motor for driving a tool of the implement. The drive motor has a drive shaft that is rotatably driven about an axis of rotation. The implement has a handle on which is disposed at least one control handle for the drive motor. Formed between the handle and the drive motor is a vibration space that is spanned by at least one anti-vibration element, at least one of which includes a coil spring, the longitudinal axis of which is disposed approximately perpendicular to a longitudinal plane of the implement. The vibration space is spanned by at least one connecting element, the longitudinal axis of which is inclined relative to a transverse plane of the implement that is disposed perpendicular to the longitudinal plane.

Abstract: A manually guided implement having a housing that accommodates an internal combustion engine for driving a tool. At least an upper handle extends in a longitudinal direction of the implement on an upper side thereof. A first antivibration element connects the handle to the housing, wherein a longitudinal central axis of the antivibration element is inclined relative to a longitudinal central plane of the implement.

Abstract: A sprocket cover arrangement for a hand-held chain saw has a housing and a sprocket cover that has an opening and is connected to the housing. At least one stud bolt having a first end secured to the housing and having a second end that is a free threaded end is provided. The free threaded end projects through the opening of the sprocket cover to an exterior side of the sprocket cover when the sprocket cover is positioned in an operating position on the housing. A nut is screwed onto the free threaded end of the at least one stud bolt on the exterior side of the sprocket cover so as to secure the sprocket cover on the housing. The nut is secured captively, rotatably and with play in the opening of the sprocket cover.

Abstract: A tubular handle for a manually guided implement, especially a power chain saw or the like, is provided. The handle has an essentially circular cross-section and at least one mounting portion for fixing the handle to the implement. In the area of the mounting portion, the circular cross-section is flattened to form an at least approximately planar abutment portion, beyond which a circular cross-sectional portion is retained. The abutment portion is provided for fixing the tubular handle to the implement.

Abstract: A portable handheld work apparatus includes: a vibration suppressor for suppressing translatory vibrations occurring during operation of the work apparatus. A drive motor drives the vibration suppressor which defines a rotational axis. The vibration suppressor includes a suppression mass mounted at a radius from the rotational axis for generating an imbalance and, as a consequence of the imbalance, the suppression mass generates an rpm-dependent translatory vibration. A spring applies a resilient biasing force to the suppression mass in opposition to an rpm-dependent centrifugal force applied to the suppression mass during the rotation. The suppression mass is mounted so as to be radially movable along a path under the action of these forces. The suppression mass defines first and second equilibrium positions along the path at first and second radii from the rotational axis corresponding to first and second rpms of the vibration suppressor.

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. When the coil spring is under load, the turns of the transition section come at least in part into contact engagement with a helically-shaped slot in the guide so that the spring stiffness of the antivibration unit increases.

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 operated implement such as a chain saw, a parting-off grinder or similar device has an internal combustion engine to drive a tool and a handle arrangement to operate the implement. The handle arrangement is connected to the internal combustion engine via a vibration damping system, the vibration damping system comprising at least one anti-vibration element. In order to achieve good vibration damping and sufficient operational rigidity in all operating ranges, in at least one direction of vibration in a predetermined frequency range the anti-vibration element has a first characteristic curve in a first state and a second characteristic curve in a second state and the anti-vibration element can be switched between the first state and the second state.

Abstract: A portable handheld work apparatus includes a drive motor (1) and a vibration suppressor (2) which is rotatably driven by the drive motor (1). The vibration suppressor (2) compensates or absorbs translatory vibrations. The vibration suppressor includes suppression masses (4, 5, 6) for generating a targeted imbalance. The suppression masses (4, 5, 6) are arranged at a radius to the rotational axis (3) of the vibration suppressor (2). At least one suppression mass (5, 6) is mounted so as to be changeable in its position in dependence upon rpm.

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 manually guided implement having a housing that accommodates an internal combustion engine for driving a tool. At least an upper handle extends in a longitudinal direction of the implement on an upper side thereof. A first antivibration element connects the handle to the housing, wherein a longitudinal central axis of the antivibration element is inclined relative to a longitudinal central plane of the implement.

Abstract: The present invention provides a method and an apparatus for detecting at least one repeater between a base station and a mobile unit. The method includes determining a first estimate of a distance traveled by a signal on a wireless communication link between the base station and the mobile unit, determining a second estimate of the distance traveled by the signal on the wireless communication link between the base station and the mobile unit, and comparing the first and second estimates. The method also includes determining whether the signal was processed by the at least one repeater based upon comparing the first and second estimates.

Abstract: A tubular handle for a manually guided implement, especially a power chain saw or the like, is provided. The handle has an essentially circular cross-section and at least one mounting portion for fixing the handle to the implement. In the area of the mounting portion, the circular cross-section is flattened to form an at least approximately planar abutment portion, beyond which a circular cross-sectional portion is retained. The abutment portion is provided for fixing the tubular handle to the implement.

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 operated implement such as a chain saw, a parting-off grinder or similar device has an internal combustion engine to drive a tool and a handle arrangement to operate the implementl. The handle arrangement is connected to the internal combustion engine via a vibration damping system, the vibration damping system comprising at least one anti-vibration element.

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.