Abstract: A method for producing a rack for a steering gear may involve providing a toothed segment and a shaft segment aligned on a longitudinal axis and connecting the segments by axial joining faces by friction welding at a welding joint. For friction welding, the joining faces may be brought into frictional contact by an initial friction force, the segments may be rotated relative to one another, the joining faces may be mutually compressed by way of a contact pressure force until a predefined joining path has been reached by way of a welding force 10 to 20 times the initial friction force, thermal input friction may be performed by an input force 5 to 12 times the initial friction force, and the segments may be moved toward one another in an axial direction by the predefined joining path. The segments may be held in position without friction.

Abstract: A method for producing a rack for a steering gear may involve providing a toothed segment and a shaft segment aligned on a longitudinal axis and connecting the segments by axial joining faces by friction welding at a welding joint. For friction welding, the joining faces may be brought into frictional contact by an initial friction force, the segments may be rotated relative to one another, the joining faces may be mutually compressed by way of a contact pressure force until a predefined joining path has been reached by way of a welding force 10 to 20 times the initial friction force, thermal input friction may be performed by an input force 5 to 12 times the initial friction force, and the segments may be moved toward one another in an axial direction by the predefined joining path. The segments may be held in position without friction.

Abstract: A soil compacting device has an upper mass, a lower mass coupled to the upper mass so as to be capable of movement and having a soil contact plate, and a holding device for holding the soil compacting device, the holding device being situated so as to be capable of movement relative to the upper mass. In addition, a vibration decoupling device is provided that is situated between the upper mass and the holding device. The vibration decoupling device has a guide device for guiding the movement of the holding device relative to the upper mass. The guide device is fashioned such that the holding device is capable of displacement in parallel relative to the upper mass. The vibration decoupling device also has in addition a spring device.

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: 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 soil compacting device has an upper mass, a lower mass coupled to the upper mass so as to be capable of movement and having a soil contact plate, and a holding device for holding the soil compacting device, the holding device being situated so as to be capable of movement relative to the upper mass. In addition, a vibration decoupling device is provided that is situated between the upper mass and the holding device. The vibration decoupling device has a guide device for guiding the movement of the holding device relative to the upper mass. The guide device is fashioned such that the holding device is capable of displacement in parallel relative to the upper mass. The vibration decoupling device also has in addition a spring device.

Abstract: The invention relates to an impact device, having an internal combustion engine and an impact mechanism driven by the internal combustion engine. An engine lubricating device supplies lubricant to the internal combustion engine. An impact mechanism lubricating device lubricates the impact mechanism accordingly. For this purpose, the engine lubricating device and the impact mechanism device partially comprise the same components.

Abstract: A piece of equipment which has a ground contact device for working on a ground region located below the ground contact device in the working position of the piece of equipment, a driving device which can be operated by an electric motor in order to produce a working movement of the ground contact device, an electrical energy accumulator, enclosed by a housing, for supplying the electric motor with electrical energy, and a covering device for covering the housing and thus the energy accumulator, which covering device is arranged above the energy accumulator in the working position. The piece of equipment may for example be a tamper, a vibration plate, a roller, or a breaker.

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: 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: An implement comprises an internal combustion engine having a throttle valve. At least one handle, the inside of which is provided with a gas lever likewise in a pivotal manner, is attached to a housing surrounding the internal combustion engine. The minimum distance between the gas lever and the handle is defined by a stop. When the operator lifts the implement by the handle, the position of the gas lever also changes. Even when the gas lever is fully depressed, only a part-load position is achieved at the throttle valve. In this way, effective rotational speed limitation is achieved.

Abstract: An implement comprises an internal combustion engine having a throttle valve. At least one handle, the inside of which is provided with a gas lever likewise in a pivotal manner, is attached to a housing surrounding the internal combustion engine. The minimum distance between the gas lever and the handle is defined by a stop. When the operator lifts the implement by the handle, the position of the gas lever also changes. Even when the gas lever is fully depressed, only a part-load position is achieved at the throttle valve. In this way, effective rotational speed limitation is achieved.

Abstract: The invention relates to a hammer and/or hammer drill acting as a breaker, having a drive, a hammer mechanism driven by the drive, and a crank device disposed in the force flow path between the drive and the hammer mechanism and coupled to an element of the hammer mechanism for transforming a rotary motion of the drive into an oscillating translation motion of the element of the hammer mechanism. A collecting device for collecting lubricant is provided above the hammer mechanism relative to a vertical operating position. The collecting device may be a collecting tank open at the top and defined by a partition of the housing and a separating floor. A connecting rod of the crank device may extend through a cutout in the separating floor. Lubricant collects above the separating floor can be delivered again and again into the interior of the housing by a delivery element.

Abstract: An implement having a drive, a drive element that may be driven by the drive and that is disposed in an axially moveable manner and is coupled to the drive element, and an overrunning clutch disposed in the drive or in a torque flux between the drive and the drive piston. If the drive has a movement that is slower than that of the drive element, the overrunning clutch is in an idle state, in which the clutch interrupts the torque flux between the drive and the drive element, thus decoupling the movement of the drive element from the drive torque of the drive. In this manner, the drive element may move more rapidly, for example during the return movement thereof, than would correspond to the movement forced by the drive.

Abstract: The invention relates to an impact device, having an internal combustion engine and an impact mechanism driven by the internal combustion engine. An engine lubricating device supplies lubricant to the internal combustion engine. An impact mechanism lubricating device lubricates the impact mechanism accordingly. For this purpose, the engine lubricating device and the impact mechanism device partially comprise the same components.

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 device for generating an air stream in a duplicating machine, in particular in a printing machine, has at least one fan unit, which includes at least one ionic fan. Methods for guiding and depositing flat products, in particular print carriers, in duplicating machines are also provided. Further, a method for the zonal powdering of print carriers in duplicating machines is provided. A delivery configuration, in particular for printing machines, is also provided.

Abstract: A storage device for data transmission lines, which serve for data transmission between a moving object and a base station, has a spool unit (2) on which a data transmission line (1) is wound in the form of a package of several layers (21) of windings. The windings in each layer are introduced at a maximum tensile stress or force, which is dependent on the modulus of elasticity of thedata transmission line (1). In this way, a creep or flow of the material of data transmission line (1), which is due to the pressure that is produced on the individual layers (21), is reduced or avoided, and a stable ordering of the windings is assured over a long period of time. The pressure of a winding on the layer (21) lying thereunder is less than 0.6 N/mm2, at least in the lower region of the windings. The maximum tensile stress is calculated from the diameters of data transmission line (1) and spool unit (2), the modulus of elasticity of data transmission line (1) and the total number N of layers (21) of the package.