Abstract: A torsional vibration damper has two mutually pivoted masses and a friction device that is active between the masses. This friction device can include a first friction device that is a spring friction device and an auxiliary friction device comprising at least one entraining wedge. The entraining wedge can function as dual wedge having at least two frictional surfaces for contacting at least one of the two mutually pivoted masses. There can also be at least one additional entraining wedge disposed parallel to the at least one entraining wedge inside of a chamber formed between the two mutually pivoted masses. The friction device and the auxiliary friction device frictionally couple the two mutually pivoted masses together.

Abstract: In order to adapt the damping behavior at a wider range in a process for damping torsional vibrations and in a torsional vibration damper, the length of an elastic element can be changed in dependence on a relative angle between two rotational subassemblies, with the degree of change in length being variable in dependence on the relative angle. Furthermore, a thrust piston of a coupling element, which couples the two subassemblies, can be displaced in dependence on the relative angle, relative to a first one of the two subassemblies.

Abstract: In order to adapt the damping behavior at a wider range in a process for damping torsional vibrations and in a torsional vibration damper, the length of an elastic element can be changed in dependence on a relative angle between two rotational subassemblies, with the degree of change in length being variable in dependence on the relative angle. Furthermore, a thrust piston of a coupling element, which couples the two subassemblies, can be displaced in dependence on the relative angle, relative to a first one of the two subassemblies.

Abstract: A torsional vibration damper has two mutually pivoted masses and a friction device that is active between the masses. This friction device can include a first friction device that is a spring friction device and an auxiliary friction device comprising at least one entraining wedge. The entraining wedge can function as a dual wedge having at least two frictional surfaces for contacting at least one of the two mutually pivoted masses. There can also be at least one additional entraining wedge disposed parallel to the at least one entraining wedge inside of a chamber formed between the two mutually pivoted masses. The friction device and the auxiliary friction device frictionally couple the two mutually pivoted masses together.

Abstract: A torsional vibration damper has two mutually pivoted masses and a friction device that is active between the masses. This friction device can include a first friction device that is a spring friction device and an auxiliary friction device comprising at least one entraining wedge. The entraining wedge can function as a dual wedge having at least two frictional surfaces for contacting at least one of the two mutually pivoted masses. There can also be at least one additional entraining wedge disposed parallel to the at least one entraining wedge inside of a chamber formed between the two mutually pivoted masses. The friction device and the auxiliary friction device frictionally couple the two mutually pivoted masses together.

Abstract: In order to adapt the damping behavior at a wider range in a process for damping torsional vibrations and in a torsional vibration damper, the length of an elastic element can be changed in dependence on a relative angle between two rotational subassemblies, with the degree of change in length being variable in dependence on the relative angle. Furthermore, a thrust piston of a coupling element, which couples the two subassemblies, can be displaced in dependence on the relative angle, relative to a first one of the two subassemblies.

Abstract: A disengaging device particularly for a clutch, with an energy storage device supplying energy when the clutch is disengaged, and storing energy in a reversed process, has a device for increasing the energy in the energy storage in dependence upon a force occurring in the disengaging device. The device for increasing energy comprises a hydraulically or pneumatically actuated punch with a variable active surface.

Abstract: A torsional vibration damper with optimized damping characteristic includes a primary body (1), a secondary body (2), and a drag element which comprises at least one friction element with at least one pressure device, at least one catch and at least one elastic element. The elastic element has an elastomeric (5) in a cavity (8).

Abstract: A clutch having narrow housing and including a disengagement unit for a clutch pressure plate with a device for applying an essentially radially directed force onto the pressure plate, and wherein the device is driven in a radial direction.

Abstract: In order to adapt the damping behavior at a wider range in a process for damping torsional vibrations and in a torsional vibration damper, the length of an elastic element can be changed in dependence on a relative angle between two rotational subassemblies with the degree of change in length being variable in dependence on the relative angle. Furthermore, a thrust piston of a coupling element, which couples the two subassemblies, can be displaced in dependence on the relative angle, relative to a first one of the two subassemblies.

Abstract: A torsional vibration damper, in particular for clutches, includes a primary structural unit and a secondary structural unit which are rotatable relative to one another and connected to each other by a spring arrangement (7) including at least one thrust piston (71). At least the secondary structural unit (2) interacts with the thrust piston (71) of the spring arrangement via a contact surface with a radially directed surface component, wherein the contact surface (4) is formed on a separate third structural unit (3) situated between the secondary structural unit (2) and the spring arrangement (7), thereby ensuring a structurally simple heat insulation for a torsional vibration damper.

Abstract: A torsional vibration damper includes two modules which rotate relative to each other and a spring chamber which is sealed by providing the first module with a first guide surface which seals the spring chamber radially to the outside, and is spaced from the second module by a gap, with the first guide surface having an axial surface component facing the spring chamber, and by providing a second guide surface which has an axial surface component which faces the spring chamber and covers the gap on the spring chamber side.

Abstract: A torsional vibration damper includes two structural units rotatable relative to one another and linked to each other by a spring arrangement which includes at least one thrust piston. At certain angles of rotation between both structural units, the flow of force between the thrust piston of the spring arrangement and at least the secondary structural unit is realized via an outer surface area that engages the thrust piston, wherein the outer surface area is formed on a separate third structural unit which is resiliently mounted relative to the secondary structural unit.

Abstract: A clutch with an axially-effective clutch pressure plate can be made particularly narrow if an actuating element for the clutch pressure plate features a device which is essentially radially driven. This design is for the application of an essentially axially driven force on the clutch pressure plate. Likewise, a motor vehicle clutch can be designed to be narrow if the disengagement unit of the motor vehicle clutch features a disk spring which acts on a clutch pressure plate, and a central disengagement element which is connected with the disk spring. In this case, the disk spring features an area bent in the axial direction, on which a plunger engages, capable of being actuated by the central disengagement element.

Abstract: A mechanical torsional vibration damper includes a primary part and a secondary part which are connected to one another by a spring and damping system of tangential compression springs and thrust plungers acting on contact surfaces on the primary part and the secondary part, with an additional damping unit being provided between the primary part and the secondary part.

Abstract: The hydraulic power transformer has a controllable, non-slip jumpering of the hydrodynamic system with insertion of a torsional vibration damper. The torsional vibration damper exhibits a device that varies the damping based on a liquid pressure acting in the vicinity of the device. This device preferably has a piston, which can be moved by the liquid pressure against a surface, and hence generates a damping.