Abstract: A tracked vehicle, in particular a construction machine, more particularly a road construction machine, with at least one drive motor and a travel pump of a travel drive hydraulic circuit, which is driven by the drive motor, for generating a drive pressure; at least one track unit, said track unit comprising a drive wheel driven via the travel drive hydraulic circuit, at least one guide wheel, a track endlessly running around the drive wheel and the guide wheel, as well as a track tensioning apparatus for tensioning the track, and the track tensioning apparatus comprising an adjusting device with a track tensioning hydraulic cylinder with which the distance between two wheels of the track unit, in particular the drive wheel and the guide wheel, is adjustable for tensioning the track, the track tensioning hydraulic cylinder being connected via a hydraulic tensioning line to a hydraulic pretensioning source via which it can be loaded with an initial pretensioning pressure.

Abstract: A spraying device for introducing a fluid into the working chamber of a construction machine for processing the ground or road surfaces, comprises two fluid delivery apparatuses, a line system and a control unit. The present invention further relates to a construction machine, especially a recycler, a stabilizer or a cold milling machine, comprising such a spraying device and a method for operating such a spraying device.

Abstract: A tracked vehicle, in particular a construction machine, more particularly a road construction machine, with at least one drive motor and a travel pump of a travel drive hydraulic circuit, which is driven by the drive motor, for generating a drive pressure; at least one track unit, said track unit comprising a drive wheel driven via the travel drive hydraulic circuit, at least one guide wheel, a track endlessly running around the drive wheel and the guide wheel, as well as a track tensioning apparatus for tensioning the track, and the track tensioning apparatus comprising an adjusting device with a track tensioning hydraulic cylinder with which the distance between two wheels of the track unit, in particular the drive wheel and the guide wheel, is adjustable for tensioning the track, the track tensioning hydraulic cylinder being connected via a hydraulic tensioning line to a hydraulic pretensioning source via which it can be loaded with an initial pretensioning pressure.

Abstract: A spraying device for introducing a fluid into the working chamber of a construction machine for processing the ground or road surfaces, comprises two fluid delivery apparatuses, a line system and a control unit. The present invention further relates to a construction machine, especially a recycler, a stabilizer or a cold milling machine, comprising such a spraying device and a method for operating such a spraying device.

Abstract: The present invention relates to a rotor hood for a milling apparatus, with a front hood part, a rear hood part and two side hood parts, the front and the rear hood part enclosing together with the two side hood parts a working space that is open at the bottom, further comprising a stripping device which is mounted on the rotor hood and which forms the rear lower edge of the rotor hood in the working direction. The present invention further relates to a construction machine with a milling apparatus and such a rotor hood and a method for operating a milling apparatus with a rotor hood.

Abstract: The present invention relates to a rotor hood for a milling apparatus, with a front hood part, a rear hood part and two side hood parts, the front and the rear hood part enclosing together with the two side hood parts a working space that is open at the bottom, further comprising a stripping device which is mounted on the rotor hood and which forms the rear lower edge of the rotor hood in the working direction. The present invention further relates to a construction machine with a milling apparatus and such a rotor hood and a method for operating a milling apparatus with a rotor hood.

Abstract: A spraying device for introducing a fluid into the working chamber of a construction machine for processing the ground or road surfaces, comprises two fluid delivery apparatuses, a line system and a control unit. The present invention further relates to a construction machine, especially a recycler, a stabilizer or a cold milling machine, comprising such a spraying device and a method for operating such a spraying device.

Abstract: A controllable and quenchable rectifier circuit for high d.c. current values, which is fed from an alternating or three-phase current main and includes a plurality of controllable rectifier elements each having associated therewith quenching devices to reduce feedback to the main. A plurality of like controllable and quenchable partial rectifier circuits are provided which are connected in parallel on the a.c. or input side in a rigid and low impedance manner and which are each connected on the d.c. or output side via impedances to two bus bars which feed a load. The current conducting controllable and quenchable rectifier elements of the rectifier circuits are quenched in a stepped sequence.