Abstract: The invention relates to a friction clutch consisting of primary and secondary disks and a pressure plate. The clutch also includes an actuator with two coaxial rings that can be rotated independent of one another. The rings compress the disks during relative rotation. In order to provide an actuator which operates accurately and with zero loss, an electric motor having at least one drive wheel is provided for the relative rotation of both rings. The drive wheel is drivingly connected to the two rings by a traction means. Two chains of the traction means lead from the drive wheel to the rotatable rings, wherein the ends of the chains are fixed to their corresponding ring, and the two rings have different diameters.

Abstract: The invention relates to a connection between a steering mechanism and a steering column (1) of a motor vehicle steering system. The connection comprises a steering coupling (2) which connects these two components, is attached by one end (3) to the steering mechanism or to the steering column (1) and, at the other end (4), bears a coupling piece (5) in an articulated manner. The latter forms a connecting partner with the other component (1) in each case and has two clamping jaws (6, 7) which, after the coupling piece (5) has been pivoted around the axis of articulation (8), engage around a section (9) of the other component (1).

Abstract: A shaft (1) with a co-rotating element (2) which is secured to it and has a surface located perpendicular to the axis (3) of the shaft, the welding taking place in the fillet formed between the seating surface (4) of the shaft (1) and axially normal surface (6, 8) of the element. To achieve a durable join without adversely affecting true running, a welding bead (20) starts at a starting point (21) on the surface (6; 8) located perpendicular to the axis (3) of the shaft (1), leads to the fillet and then leads back to an end point (21?) on the surface (6; 8) located transversely with respect to the axis of the shaft.

Abstract: A speed-difference-dependent hydraulic clutch comprises a drive housing (11), which rotates in a housing (20), a first shaft (21) which can be connected in a rotationally fixed manner to the drive housing, a second shaft (22) which is connected in a rotationally fixed manner to the drive housing, and furthermore a hydrostatic displacement machine (1), a friction clutch (12) for connecting the first shaft (21) to the drive housing (11), and a piston (10) for acting on the friction clutch (12), the drive housing (11) having a pressure space (9) and where a pressure is produced in the pressure space (9) when a difference in speed occurs in the pressure space (9), this pressure giving rise to action upon the friction clutch (12), and a passage (13) leading from the pressure space to a control valve which opens up the route to a space of lower pressure in a controlled manner.

Abstract: A device for setting the torque transmitted by a friction clutch (12), having an actuator chain which comprises an electric motor (45), a step-down gear (42) and a mechanism for converting the rotational movement into a displacement of a pressure plate (29) of the clutch (12), so as to enable the torque which is transmitted to be set precisely and rapidly even given high friction. For this purpose, the electric motor (45) and/or step-down gear (42) is/are affected by friction, the conversion mechanism (31, 32, 35, 36, 40) and/or the friction clutch (12) itself is/are affected by elasticity, and, to set the torque (Md) of the friction clutch (12), a position regulator (47) which is operatively connected to the electric motor (45) and a sensor (46; 46?) which determines the position of one of the links of the actuator chain (45, 42, 41, 40, 36, 35, 32, 31, 29) are provided, the sensor being present at a location upstream of a substantial part of the elasticity in the force-flow direction.