Abstract: A piston compressor for compressing a gas, which optionally can be disconnected from a drive device by a clutch, has an inlet valve, which is arranged between an inlet line for gas to be compressed and a compression chamber of the piston compressor, and an outlet valve, which is arranged between the compression chamber of the piston compressor and an outlet line for compressed gas. The piston compressor includes a closing device which closes the outlet line with respect to the compression chamber.

Abstract: A piston compressor is provided for compressing a gas, which optionally can be disconnected from a drive device by way of a clutch. The piston compressor has an inlet valve, which is arranged between an inlet line for gas to be compressed and a compression chamber of the piston compressor, and an outlet valve, which is arranged between the compression chamber of the piston compressor and an outlet line for compressed gas. The piston compressor has a venting device, by which compressed gas can be led out of the compression chamber.

Abstract: A torsional vibration damper is described for damping torsional vibrations of a shaft, in particular, of the crankshaft of a reciprocating engine, having a housing which is connected to the shaft and has a closed, annular receiving chamber for receiving a flywheel ring and a highly viscous fluid, wherein the flywheel ring is coupled to the housing via spring elements. Here, the characteristic is determined firstly by the shearing forces of the highly viscous fluid, in particular, the silicone oil, in the gap spaces and secondly by the spring characteristic or rigidity of the resilient supporting ring. The flywheel ring is mounted circumferentially on an elastic supporting ring, which is connected to the housing. Alternatively, a torsional vibration damper may have the flywheel ring mounted on the inside on a rotationally elastic axial bearing.

Abstract: A parking brake for a commercial vehicle equipped with an air-operated service brake is configured in such a way that the actuating energy for the brake is reduced in comparison to a configuration with a spring brake cylinder, while the installation space in the wheel area is minimized. Primary functional parts of the parking brake include an inner race and an outer race, which delimit an annular gap. Displaceable tapered-roller bearings are located in the annular gap. To adopt a release position in opposition to the action of a compression spring, the tapered roller bearings are disengaged from the conical surfaces of the inner race and the outer race.

Abstract: A rotary oscillation damper of a motor-driven vehicle, includes a substantially rotationally symmetrical base part and a damping member. The rotary oscillation damper is constructed to form part of a brake, particularly a parking brake, wherein brake shoes or brake pads, which are arranged on the vehicle side in a fixed manner, can be pressed against the base part or parts which are connected thereto such as rings or flanges.

Abstract: A parking brake for a commercial vehicle equipped with an air-operated service brake is configured in such a way that the actuating energy for the brake is reduced in comparison to a configuration with a spring brake cylinder, while the installation space in the wheel area is minimized. Primary functional parts of the parking brake include an inner race and an outer race, which delimit an annular gap. Displaceable tapered-roller bearings are located in the annular gap. To adopt a release position in opposition to the action of a compression spring, the tapered roller bearings are disengaged from the conical surfaces of the inner race and the outer race.

Abstract: A viscous damper having a sheet metal housing and cover for closing the housing is described. A flywheel ring is mounted in a fluid in a floating manner inside the housing, and the viscous damper includes a bearing borehole. An additional centering capability for the viscous damper is provided on the cover and/or on the housing, in the form of centering projections arranged on a common periphery. In this way, the viscous damper can be additionally or independently centered on a larger diameter than that of the bearing borehole. Other centering projections can be arranged on different peripheries.

Abstract: The invention relates to a viscous torsional vibration damper comprising a damping housing (1) that surrounds an annular working chamber (7) and can be connected to a machine part that is to be damped. In order to improve the dissipation of heat from the interior of the damper, a fan plate (15) is mounted on at least one flat face of the damper to conduct heat. A plurality of hollow cylindrical cooling channels (17, 18) projects from the plane of the fan plate, said channels creating intense turbulence in the air that is entrained by the rotation, thus intensifying the transfer of heat.