Abstract: A handle for a drill- and/or chisel hammer has a mount which can be fixed to the hammer. A radial grip is fixed to said mount, the grip axis of said radial grip crossing a tool axis which is defined by the position of a tool received by the hammer. A tangential grip is also fixed to the mount. Said tangential grip has a first grip section whose grip axis is tangential to the tool axis and a second grip section whose grip axis is tangential to the tool axis and essentially perpendicular to the grip axis of the first grip section.

Abstract: The invention relates to a guiding cart for a manually guided tool, for example an abrasive cut-off machine, which comprises a movable frame on which a first and a second locating recess for inserting the abrasive cut-off machine are provided. A locking device is assigned to the first recess by means of which forces can be applied to the abrasive cut-off machine in the direction of the first locating recess and the second locating recess. In this way the abrasive cut-off machine can be reliably and rapidly fixed to the guiding cart after it has been inserted into the locating recesses. The insertion of the abrasive cut-off machine is facilitated by inclined inserting elements situated in the locating recesses.

Abstract: A device for controlling the speed of an internal combustion engine in a working tool including a device for recognizing a special operating state of the working tool. By way of example, a special operating state can be taken to mean the start-up of the internal combustion engine or a danger that can occur when the user lets go of said working tool or the tool tips over. An adjustment device adjusts the engine speed of the internal combustion engine to a safety speed that is below the operating speed of the internal combustion engine when the special operating state is recognized.

Abstract: A working device, especially a ramming device for compacting soil, comprises a housing which belongs to an upper mass, and has a working mass which can be linearly driven back and forth with regard to the upper mass. The working mass is linearly guided via a guide cylinder which is fastened to the housing with elastic mobility. The transfer of bounce impacts acting upon the working mass to the upper mass can be effectively reduced by the elastic mobility of the guide cylinder with regard to the housing.

Abstract: A vibrating plate consists of an upper mass with a drive unit and a lower mass with a ground contact plate and a vibration exciter. The upper mass and lower mass are coupled with each other at several points with spring-and-damper units. According to the invention, the spring properties and/or damping properties of the particular spring-and-damper unit in at least one of these points can be modified via a steering device which makes it possible to steer the vibrating plate.

Abstract: A vibration plate has a sole element that can be fastened durably and without difficulty by straightforward techniques. This is achieved in that, rather than being fastened on the ground-contact plate or the oscillation generator of the bottom mass, the sole element is fastened on the top mass with the drive motor.

Abstract: The invention relates to a safety device for the manually operated soil compaction roller, comprising an operating lever and an adjusting element coupled to an actuator in order to drive said roller. In case of danger, a safety-control element travels in between the adjusting element and the operating lever and separates the positive coupling, whereupon the adjusting element swings into a neutral position and shuts down the machine. When the operating lever swings forwards, a command corresponding to a forward movement is transmitted to the drive mechanism of said roller via a second positive coupling.

Abstract: A working device, especially a ramming device for compacting soil, or a hammer, has a crank mechanism for producing a controlled vibration. The crank mechanism is coupled with a set of springs. According to the invention, the crank disk belonging to the crank mechanism is provided with a counter-mass whose center of gravity is shifted around an angle not equal to 180° from the center of gravity of a crank pin on the crank disk, in relation to the axis of rotation of the crank disk. This prevents vibrations which would be unpleasant for the person operating the device from occurring.

Abstract: A working tool, in particular a soil rammer or hammer, has two masses that may be linearly moved back and forth with respect to one another, namely, a top mass which has a driving motor and a ramming or striking working mass which can be moved by the motor relative to the top mass by means of a crank drive and a set of springs. In order to reduce as much as possible the displacement of the top mass, an additional counterweight can be moved by the motor over at least a large part of the path of displacement of the working mass in the opposite direction thereto. The displacement of the end of the set of springs linked to the crank drive and the displacement of the counterweight are preferably offset relative to one another, with respect to the crank angle, by 180° minus a phase shift derived from the construction parameters of the set of springs.

Abstract: An impacting device is capable of being used in an impact hammer and/or a drill for releasing by impact tools blocked in rocks. An impact impetus supplied by an impact piston is modified via an impact-deflecting device having a sliding lever and a deflecting lever, such that the impact is carried out in a releasing impact direction opposite the normal impact direction and is transmitted to a tool by a slide and a locking lever. The tool is released after a few strokes produced by the impact piston. The impact device is suitable for both unilateral air springs and double air springs.

Abstract: The inventive percussion and/or drill hammer (10) consists essentially of a hammer housing (12) which surrounds a rotor for a percussive tool (11), including the drive mechanism and the holding element, and an outer shell (14) which encompasses the hammer housing (12) at a distance. Said outer shell (14) is connected elastically to the hammer housing (12) at selected coupling points and is connected to a first handle (16) at the end facing away from percussive tool (11) in the direction of impact of said percussive tool (11). The outer shell (14) extends as far as or at least almost as far as the percussive tool (11) where it is provided or can be provided with a second handle (17), said percussive tool projecting out of the hammer housing (12).

Abstract: A soil compacting machine has a receiver unit that can receive control signals from a transmitter unit to a receiver unit. The transmitter unit can be operated by a user and is separate from the machine. The control signals are then processed into commands and sent to a control mechanism of the machine. Signals originating from the transmitter unit and reflected by the machine are received as safety signals by a receiver connected to the transmitter unit and are tested in relation to at least one distance-dependent parameter. If the parameter which is tested shows that a predetermined safety distance between the machine and the receiver is not respected, the transmission of the control signals or the operation of the machine is interrupted.

Abstract: A device for generating directed vibrations has two centrifugal weights which are independently driven at the same speed of rotation but in opposite directions. The centrifugal weights are supported on a largely stiff carrier secured by a holder to a bracket. The holder allows the carrier to move relative to the bracket. When the centrifugal weights start moving, they become synchronized within a short period of time and generate vibrations which can be used in the desired manner via the bracket.

Abstract: The invention relates to a pneumatic impact mechanism for a paving breaker and/or hammer drill which is characterized by a drive piston (1) having air equalization slits (5) and an extremely reduced wall thickness of the guide sleeve (1a) thereof This leads to a distinct reduction of the vibrations during the no-load operation of the impact mechanism, whereby advantageous characteristics of the impact mechanism with regard to wear behavior and compactness can be retained.

Abstract: A cable drum has a rotating winder fitted in a mounting and a frequency converter fitted on the winder. At least one socket outlet of the winder is electrically coupled to the frequency converter and is supplied with an electrical spatial frequency. The integration of the cable drum and frequency converter makes it easier to transport the equipment by reducing weight and the number of pieces.

Abstract: A connecting device enabling spring-suspended connection of a shaft or a guiding bar (3) to a hand-operated vibrating plate which has two pairs arranged at a fixed distance from each other in the direction of a vertical pivotal axis (8), each pair has a first connecting element in the form of a rubber buffer (5) and a second connecting element in the form of a ring (4a) surrounding the rubber buffer (5) substantially free of play and sliding coaxially in relation to the pivotal axis (8). One connecting element (5) of each pair (4a, 5) is fastened to the upper section (1a) and the other connecting element (4a) is fastened to the shaft of guiding bar (3).

Abstract: A soil compacting device has a damping system which couples an upper mass and a lower mass together with a spring system in a vibration system. The damping properties of the damping system can be modified while the device is in operation. Therefore, when the soil compacting device passes over soils having different properties, it can constantly be adjusted in an optimal manner to the ground underneath it by acting on the vibration properties of the overall vibration system.

Abstract: A device for removing dirt adhering to the tire (2) of a roller used for compacting soil and for spraying the tire (2) with water. The scraping unit (5, 6) and a nozzle system (10, 11, 12) are joined into one modular component and the scraper (6) forms a cavity (10) that is sealed off from a scraper support (5). A water supply pipe (11) leads into the cavity (10) from which nozzles (12) branch off through the wall of the scraper support (5).

Abstract: A device for receiving formwork elements used to manufacture concrete elements has a bearing static structure and a flat formwork joined therewith which can be driven to vibrate by an exciting device in order to compact the still-plastic concrete. The sound-insulating joining devices are inserted between the formwork shell and the static structure. The exciting device bypasses the joining device and acts directly or indirectly on the formwork shell.