Abstract: A soil compacting device has an upper body and a lower body which is coupled to the upper body by a spring device and which has a soil contact element. Furthermore, a drive generates is provided for generating an operating motion of the soil contact element, and an energy store is provided for storing electrical energy. A cooling air flow, which is guided through a cooling air flow guide along the energy store, can be created by an air conveying device.

Abstract: A working device for ground compaction comprises an upper mass, a guide device coupled to the upper mass and intended to guide the working device, a lower mass which can move relative to the upper mass, which is movably coupled to the upper mass via a spring device, and which has a ground contact plate, and a vibration-generating device for producing a relative movement between the upper mass and the lower mass. Furthermore, a drive for driving the vibrating-generating device is provided, wherein the drive comprises an electric motor. The electric motor is supplied with electrical energy via an electrical energy store arranged on the guide device.

Abstract: A tamping device for soil compaction having an upper mass with a drive and a lower mass that can be moved relative to the upper mass with a soil contacting element. In order to cause a working movement of the soil contacting element, a vibration generating device is provided. In addition to the vibration generating device, a manipulating device, for example in the form of a damping body, is provided in an operatively connected manner between the upper mass and the lower mass. The damping properties of the damping body can be modifiable.

Abstract: A percussion mechanism that has a motor, a drive piston which can be moved to and fro in a guide cylinder by the motor, and a percussion piston. A coupling device is active between the drive piston and the percussion piston, via which coupling device the movement of the drive piston is transmitted to the percussion piston. The motor can be configured as a reluctance motor or as a synchronous motor. The motor can be actuable in such a way that different rotational speeds of the rotor can be generated within a percussion cycle and/or from percussion cycle to percussion cycle.

Abstract: A wire-binding device for binding together at least two objects comprises a handle part via which the wire-binding device can be held by an operator. Pushing forward the handle part causes a V-shaped wire clip to be guided along the inside of two closing jaws of a mouth until the wire clip encloses the two objects which are to be connected. Additionally provided on the mouth is positioned having two mutually opposite guide faces of which the spacing from one another is less than the spacing of the closing jaws from one another.

Abstract: The invention relates to a percussion tool having an internal combustion engine and a hammer mechanism that can be driven by the internal combustion engine by means of a transmission. A part of the engine housing, the transmission housing, or the impact hammer mechanism housing is enclosed by a cover. The cover is spaced at a distance from the remainder of the machine, so that a gap is present between the cover and the remainder of the machine. Cooling air can flow into the gap at the lower face of the cover and flow back out via a flue and an opening. The components beneath the cover are thereby effectively cooled, even without an additional cooling air blower.

Abstract: A percussion tool has a cooling air channel for guiding a cooling air flow from a cooling air fan to an outside wall of a cylinder of an internal combustion engine. The cooling air channel is tapered to the extent that partial cooling air flows guided between the respective cooling fins are branched off the main cooling air flow. In such a way, the flow rate of the cooling air flow in the cooling air channel remains substantially constant, resulting in optimized engine cooling. The cooling air channel may be divided into two cooling air channels downstream of the cylinder. One of the cooling air channels guides cooling air to an exhaust gas system of the internal combustion engine, while the other cooling air channel guides cooling air to an outside wall of the guide housing of a hammer mechanism.

Abstract: A drive system has an engine, a tank container for storing an expendable operating medium for the engine, a filling-level monitoring apparatus for monitoring the filling level in the tank container and/or in a feed line from the tank container to the engine, and an interruption apparatus for interrupting the engine in the case of an imminent lack of operating medium. If the filling level drops below a predefined filling-level height, this is detected by the filling-level monitoring apparatus and reported to the interruption apparatus which thereupon interrupts the drive system. Drive systems which are designed in this way are suitable for use in equipment, for example, in civil engineering, where emptying of the fuel tank frequently occurs as a result of the extreme building-site operation.

Abstract: A tamper as a soil-compacting device having a combustion engine, a soil contact element, and a motion conversion device for converting a rotary movement of the combustion engine into an oscillating linear movement of the soil contact element. Furthermore, a clutch device for connecting and interrupting the force flow between the combustion engine and the motion conversion device is provided. In addition to the combustion engine, an electric motor with a rotor and a stator is provided, wherein the operator can switch between the combustion engine and the electric motor. The rotor can be arranged directly on a clutch bell of the clutch device.

Abstract: An oscillation exciter, in particular for a vibration plate, has a rotating unbalanced mass (3) for producing a non-directional oscillation which is transmitted to a ground contact element (1). In order to transmit the oscillation to the ground contact plate (1), a transmission device (7, 8) is provided, which connects the unbalanced shaft (3) to the ground contact element (1) and by means of which the non-directional oscillation of the unbalanced shaft (3) can be converted to a directional oscillation for the ground contact plate (1). The transmission device (7, 8) is designed such that, with respect to an oscillation plane, it has different and variable stiffnesses in different directions within the oscillation plane.

Abstract: A drilling and/or percussive hammer comprises a handle and a hammer housing, which can move relative to the handle and inside of which, among other things, a pneumatic spring percussive mechanism is housed. The pneumatic spring of the pneumatic spring percussive mechanism can be ventilated via a no-load operation duct that is opened and closed by a valve. The valve can be opened and closed according to a pressing force acting upon the handle. A delay device controls the valve during closing so that the valve reaches the position corresponding to the detected pressing force only with a time delay. This causes a smooth transition from the no-load operation to the percussive operation.

Abstract: At the end of a guide handle of a vibration plate service as soil-compactor an actuating element is mounted which can be moved in relation to the guide handle. Each position of the actuating element is detected by a sensor device which transmits a corresponding signal to a hydraulic steering unit. In this way, the phase angles of unbalance masses can be modified which in turn influences the direction of travel of the vibration plate.

Abstract: A soil compaction device has a vibrated contact element that makes contact with the soil during a contact phase and that is exposed to a contact force exerted by the soil and travels over a contact distance. A dynamic stiffness of the soil is formed from the gradient of the contact force and from the contact distance. Furthermore, a contact surface parameter to take account of the actual contact surface of the contact element with the soil is determined. The dynamic deformation modulus is then the product of the contact surface parameter and the dynamic stiffness. The method allows the determination of the dynamic deformation modulus, and hence of the soil stiffness, during the compaction operation.

Abstract: A vibrating plate serving as a tamping device comprises an upper mass equipped with a drive and comprises at least two lower masses, which are coupled to the upper mass while being able to oscillate relative to the upper mass. Each of the lower masses comprises a soil contacting plate and at least one oscillator assigned to this soil contacting plate. The oscillators can be controlled differently so that, in addition to an advancing and compacting action, a turning moment can be executed about a vertical axis (Z).

Abstract: Disclosed is a drilling and/or striking hammer that includes a lubricating device having a lubricant reservoir and a volume of lubricant contained therein. The lubricating device conveys lubricant to at least one a transmission system within the hammer's housing, a percussion system, and/or a tool holder at a variable dosing or flow rate. The dosing or flow rate varies as a function of tool stress which can include use intensity and/or temperature. A flexible tube extends between the reservoir and the lubricated component(s). At lease part of the flexible tube vibrates with the lubricated components during use and modifies a viscosity of the lubricant therein, based on tool use intensity. A pressure generating device can pressurize the lubricant, helping convey the lubricant to a targeted area for lubricating movable parts.

Abstract: A vibrating plate system comprises at least two vibrating plates are mechanically coupled to one another via a coupling device and a controlling transmitter for outputting control data to the vibrating plates. Each of the vibrating plates comprises a receiving device for receiving the control data, a drive mechanism for propelling the vibration plate forwardly and rearwardly, and a position determining device for determining the position of the relevant vibrating plate within the group. A rule memory is also provided in which control rules are stored. One control rule defines a correlation between a control measure for controlling the traveling mechanism according to the position of the vibrating plate and an item of control information given by the control data. In each vibrating plate, a single control device selects a suitable control rule according to the position of the vibrating plate and to the control measure.