Abstract: A construction machine, in particular road milling machine, recycler or stabilizer, with a machine frame (4) that is carried by a chassis (2) with a working drum (6) and a drive train (8) comprising at the least a drive engine (10), a traction mechanism (12) for the mechanical drive of the working drum (6) with a drive element, an output element and a traction element (30), a device (14) for switching the torque between the drive engine (10) and working drum (6), and device (16) for driving at least one hydraulic pump; it is provided that elements of the drive train (8) are divided into at least two groups, the first group (3) shows at least the drive engine (10), the second group (5) shows at least the drive element (11) of the traction mechanism, and where the first and the second groups (3, 5) are connected to one another via an articulated coupling device (20).

Abstract: A method is provided for measuring the milling depth of a road milling machine, the machine being operative to mill a ground surface with a milling roller lowered to a milling depth to create a milling track, the machine including at least one side plate located to at least one side of the milling roller to engage an untreated ground surface, and the machine including a stripping plate operative to be lowered onto the milling track generated by the milling roller. The method includes measuring the milling depth of the milling track, the measuring including detecting a measurement value of a ground engaging sensor engaging the milling track.

Abstract: In a self-propelling road milling machine (1), particularly a (recycler or) cold-milling machine, comprising a machine frame (4) carried by a track assemblies (2,3) via lifting columns (12,13), a milling roll (6) supported on the machine frame (4) for treatment of a ground or traffic surface (8), height-adjustable side plates (10) for edge protection, arranged to rest on the ground or traffic surface (8) to be treated, a height-adjustable stripping means (14) arranged in the moving direction behind the milling roll (6) and adapted to be lowered, during operation, into the milling track (17) generated by the milling roll (6), and a control means (23) for controlling the milling depth of the milling roller (6), it is provided that at least one measuring means (16) is operative to detect the lifting, caused by the current milling depth, of a first sensor means resting on the ground or traffic surface (8), and/or the lowering of the stripping means (14) or a second sensor means onto the surface of the milling tra

Abstract: A construction machine for the treatment of ground surfaces includes a machine frame, a drive motor, a work drum supported from the machine frame and including exchangeable tools fastened to the work drum, a belt drive and an auxiliary drive. The belt drive includes a motor-side pulley connected to the drive motor, a drum-side pulley connected to the work drum, and at least one drive belt connecting the motor-side pulley to the drum-side pulley. The auxiliary drive may be permanently coupled to the belt drive, or the auxiliary drive may include an adjustment mechanism for moving the auxiliary drive between a coupled and an uncoupled position.

Abstract: A method and apparatus for measuring the amount of fuel aboard a spacecraft under weightless conditions utilize at least one orifice, at least one flow latch valve for the selection of an orifice to be used, and at least one control valve for releasing a stream of a pressurizing gas from at least one high-pressure tank in order to restore pressure in a fuel tank following a pressure reduction due to withdrawal of fuel. The amount of fuel remaining in the fuel tank is determined based on the time required to restore fuel tank pressure by a flow of gas from the high pressure tank to the fuel tank, via the orifice.

Abstract: A construction machine for the treatment of ground surfaces includes a machine frame, a drive motor, a work drum supported from the machine frame and including exchangeable tools fastened to the work drum, a belt drive and an auxiliary drive. The belt drive includes a motor-side pulley connected to the drive motor, a drum-side pulley connected to the work drum, and at least one drive belt connecting the motor-side pulley to the drum-side pulley. The auxiliary drive may be permanently coupled to the belt drive, or the auxiliary drive may include an adjustment mechanism for moving the auxiliary drive between a coupled and an uncoupled position.

Abstract: A method of operating a road-building machine involves a machine having a chassis with four ground engaging supports and four working cylinders connecting the ground engaging supports to the chassis. A height of the left front and right rear ground engaging supports is adjusted in a first direction. The height of the right front and left rear ground engaging supports is adjusted in a second direction opposite the first direction.

Abstract: In a method for optimizing a cutting process in milling machines which are used to machine road coverings, which comprise a milling device fitted with milling tools which is sprayed with liquid in order to cool the milling tools, in addition to a drive motor, the following steps are provided: detection of the at least one parameter which is representative of the instantaneous power output of the milling device and controlling the amount of cooling liquid supplied according to the at least one parameter which is representative of the instantaneous power output of the milling device.

Abstract: The invention relates to a self-propelled civil engineering machine, in particular a road-milling machine, a road recycler, or a road stabilizer, having a frame carried by a set of running gear, a working unit for performing work required for the civil engineering operation, and in particular a working drum, and a drive unit carried by the frame of the machine, to drive the working drum. A power transmitter is used to transmit the driving power from the drive unit to the working unit. The drive unit of the self-propelled civil engineering machine has a first and a second drive engine, the power transmitter being so designed that the driving powers coming from the first and the second drive engines can be transmitted to the working unit together.

Abstract: A construction machine for the treatment of ground surfaces includes a machine frame, a drive motor, a work drum supported from the machine frame and including exchangeable tools fastened to the work drum, a belt drive and an auxiliary drive. The belt drive includes a motor-side pulley connected to the drive motor, a drum-side pulley connected to the work drum, and at least one drive belt connecting the motor-side pulley to the drum-side pulley. The auxiliary drive may be permanently coupled to the belt drive, or the auxiliary drive may include an adjustment mechanism for moving the auxiliary drive between a coupled and an uncoupled position.

Abstract: In a method for optimizing a cutting process in milling machines which are used to machine road coverings, which comprise a milling device fitted with milling tools which is sprayed with liquid in order to cool the milling tools, in addition to a drive motor, the following steps are provided: detection of the at least one parameter which is representative of the instantaneous power output of the milling device and controlling the amount of cooling liquid supplied according to the at least one parameter which is representative of the instantaneous power output of the milling device.

Abstract: The invention relates to a self-propelled civil engineering machine, in particular a road-milling machine, a road recycler, or a road stabilizer, having a frame carried by a set of running gear, a working unit for performing work required for the civil engineering operation, and in particular a working drum, and a drive unit carried by the frame of the machine, to drive the working drum. A power transmitter is used to transmit the driving power from the drive unit to the working unit. The drive unit of the self-propelled civil engineering machine has a first and a second drive engine, the power transmitter being so designed that the driving powers coming from the first and the second drive engines can be transmitted to the working unit together.

Abstract: A method of operating a road-building machine involves a machine having a chassis with four ground engaging supports and four working cylinders connecting the ground engaging supports to the chassis. A height of the left front and right rear ground engaging supports is adjusted in a first direction. The height of the right front and left rear ground engaging supports is adjusted in a second direction opposite the first direction.

Abstract: A construction machine, in particular road milling machine, recycler or stabilizer, with a machine frame (4) that is carried by a chassis (2) with a working drum (6) and a drive train (8) comprising at the least a drive engine (10), a traction mechanism (12) for the mechanical drive of the working drum (6) with a drive element, an output element and a traction element (30), a device (14) for switching the torque between the drive engine (10) and working drum (6), and device (16) for driving at least one hydraulic pump; it is provided that elements of the drive train (8) are divided into at least two groups, the first group (3) shows at least the drive engine (10), the second group (5) shows at least the drive element (11) of the traction mechanism, and where the first and the second groups (3, 5) are connected to one another via an articulated coupling device (20).

Abstract: A construction machine for the treatment of ground surfaces includes a machine frame, a drive motor, a work drum supported from the machine frame and including exchangeable tools fastened to the work drum, a belt drive and an auxiliary drive. The belt drive includes a motor-side pulley connected to the drive motor, a drum-side pulley connected to the work drum, and at least one drive belt connecting the motor-side pulley to the drum-side pulley. The auxiliary drive may be permanently coupled to the belt drive, or the auxiliary drive may include an adjustment mechanism for moving the auxiliary drive between a coupled and an uncoupled position.

Abstract: A construction machine for the treatment of ground surfaces includes a chassis carrying a machine frame, a driveable work drum supported from the machine frame and including an outer surface and exchangeable tools fastened to the outer surface, a working space defined within the machine adjacent the work drum, and at least one seat for an operating person, the at least one seat being movable into a working position in the work space adjacent the work drum so that the operating person can exchange the tools on the work drum.

Abstract: A construction machine, in particular road milling machine, recycler or stabilizer, with a machine frame (4) that is carried by a chassis (2) with a working drum (6) and a drive train (8) comprising at the least a drive engine (10), a traction mechanism (12) for the mechanical drive of the working drum (6) with a drive element, an output element and a traction element (30), a device (14) for switching the torque between the drive engine (10) and working drum (6), and device (16) for driving at least one hydraulic pump; it is provided that elements of the drive train (8) are divided into at least two groups, the first group (3) shows at least the drive engine (10), the second group (5) shows at least the drive element (11) of the traction mechanism, and where the first and the second groups (3, 5) are connected to one another via an articulated coupling device (20).

Abstract: The invention relates to a road-building machine whose left front wheel (4) or caterpillar, right front wheel (6) or caterpillar, left rear wheel (8) or caterpillar and right rear wheel (10) or caterpillar are connected to the road-building machine chassis by means of an actuating element and are height-adjustable with respect to the road-building machine frame. According to said invention, different actuating elements are rigidly connected to the road-building machine chassis and forcedly coupled to each other in such a way that the left front wheel (4) or caterpillar and the right rear wheel (10) or caterpillar are height-adjustable in the same direction and with respect to the right front wheel (6) or caterpillar and the left rear wheel (8) or caterpillar are adjustable in the opposite directions. The all wheels (4, 6, 8, 10) or caterpillars are equally height-adjustable.

Abstract: A chisel holder system including a base part and a chisel holder. The base part includes a socket wherein the chisel holder with a plug-in insert is introduced. The chisel holder has a bearing surface supported on a supporting surface of the base plate, and the base part has a shoulder connected to the supporting surface. A replacement chamber is formed between the shoulder and a facing end surface of the chisel holder. According to this invention, the supporting surface is placed in the transition region in relation to the shoulder by at least one recess of the shoulder so that the flat-shaped connection between the supporting surface and the shoulder, in the region of the recess, is interrupted in order to optimize the resistance to wear and tear of the base part.

Abstract: A construction machine for the treatment of ground surfaces includes a chassis carrying a machine frame, a driveable work drum supported from the machine frame and including an outer surface and exchangeable tools fastened to the outer surface, a working space defined within the machine adjacent the work drum, and at least one seat for an operating person, the at least one seat being movable into a working position in the work space adjacent the work drum so that the operating person can exchange the tools on the work drum.