Abstract: A hydraulic drive (1) has a position selection device (2) in communication with a control valve (3) which, as a function of the actuation of the position selection device (2), controls the connection of an actuating cylinder (8) with a hydraulic fluid source (5) and a reservoir (6). A correction device provides a synchronization between the position of the position selection device (2) and the position of the actuating cylinder (8). The correction device has a sliding valve means (15) which detects a reference range of the actuating cylinder (8) and an on-off valve means (16) effectively connected mechanically with the position selection device (2). The on-off valve means (16) is open when the position selection device (2) is in the reference range and is closed when the position selection device (2) is not in the reference range.

Abstract: An at least partially cooled product display cabinet in which cooling of the area or areas of the product display cabinet to be cooled takes place at least partially by means of a cooling air flow and/or by means of static cooling is described. According to the invention, at least one sensor (a, a?, a?, b, b?, b?, c, c?, c?, d, d?, d?) that is used to detect contaminants and/or particles of dirt in the cooling air flow is arranged in and/or on the product display cabinet. If the product display cabinet has at least one cooling air inlet area (5, 5?, 5?) and/or at least one cooling air outlet area (7, 7?, 7?) and/or at least one evaporator (8, 8?, 8?), the sensor or sensors (a, a?, a?, b, b?, b?, c, c?, c?, d, d?, d?) in the or a cooling air inlet area (5, 5?, 5?) and/or in the or a cooling air outlet area (7, 7?, 7?) and/or in the flow direction are located essentially directly upstream or downstream from the evaporator or evaporators (8, 8?, 8?).

Abstract: A hydraulic steering device (1) has a steering angle transmitter (2) in communication with a steering valve (3) which, as a function of the actuation of the steering angle transmitter (2), controls the communication between a steering drive (11), e.g., a steering cylinder (12) with a hydraulic pressure source (5) and a reservoir (9), and a correction device (15). The correction device (15) provides synchronization of the position of the steering angle transmitter (2) with the position of the steering angle drive (11) when the steering drive (11) or steering angle transmitter (2) is in a reference range and the position of the steering angle transmitter (2) and/or of the steering drive (2) varies from the reference range.

Abstract: A hydraulic drive (1) has a position selection device (2) in communication with a control valve (3) which, as a function of the actuation of the position selection device (2), controls the connection of an actuating cylinder (8) with a hydraulic fluid source (5) and a reservoir (6). A correction device provides a synchronization between the position of the position selection device (2) and the position of the actuating cylinder (8). The correction device has a sliding valve means (15) which detects a reference range of the actuating cylinder (8) and an on-off valve means (16) effectively connected mechanically with the position selection device (2). The on-off valve means (16) is open when the position selection device (2) is in the reference range and is closed when the position selection device (2) is not in the reference range.

Abstract: A hydraulic steering device (1) has a steering angle transmitter (2) in communication with a steering valve (3) which, as a function of the actuation of the steering angle transmitter (2), controls the communication between a steering drive (11), e.g., a steering cylinder (12) with a hydraulic pressure source (5) and a reservoir (9), and a correction device (15). The correction device (15) provides synchronization of the position of the steering angle transmitter (2) with the position of the steering angle drive (11) when the steering drive (11) or steering angle transmitter (2) is in a reference range and the position of the steering angle transmitter (2) and/or of the steering drive (2) varies from the reference range.

Abstract: An at least partially cooled product display cabinet in which cooling of the area or areas of the product display cabinet to be cooled takes place at least partially by means of a cooling air flow and/or by means of static cooling is described. According to the invention, at least one sensor (a, a′, a″, b, b′, b″, c, c′, c″, d, d′, d″) that is used to detect contaminants and/or particles of dirt in the cooling air flow is arranged in and/or on the product display cabinet.

Abstract: A non-rotating and axially secured connection between an inner joint part of a constant velocity joint and a driveshaft has an inner joint part at its outer circumference with tracks for receiving torque-transmitting balls or tripod arms for sliding on rollers, as well as a central bore with inner teeth. The driveshaft is inserted into the bore and is provided with corresponding outer teeth. At the end of the inner joint part facing the shaft end, the bore, with its inner teeth, changes into a through-hole with a smaller diameter. At the end of the driveshaft in front of the outer teeth, a cylindrical portion is provided carrying an axial securing mechanism.

Abstract: A non-rotating and axially secured connection between an inner joint part of a constant velocity joint and a driveshaft has an inner joint part at its outer circumference with tracks for receiving torque-transmitting balls or tripod arms for sliding on rollers, as well as-a central bore with inner teeth. The driveshaft is inserted into the bore and is provided with corresponding outer teeth. At the end of the inner joint part facing the shaft end, the bore, with its inner teeth, changes into a through-hole with a smaller diameter. At the end of the driveshaft in front of the outer teeth, a cylindrical portion is provided carrying an axial securing mechanism.

Abstract: A rotational fixed connection has a shaft whose axial end is provided with outer shaft teeth and a hub whose through-bore is provided with inner teeth. The connection is useful between a driveshaft in the driveline of a motor vehicle and a joint hub of a universal tripod joint or a constant velocity universal ball joint. The joints include the hub, torque transmitting roller elements, and an outer joint part. The outer shaft teeth of the shaft, at a distance from the hub teeth end at the shaft shank end, run out steplessly into the shaft shank. The outer shaft teeth end inside the hub with a stepped end. In the region following the outer shaft teeth, the shaft includes a tooth-free end portion. The tooth-free end portion carries or forms fixing elements which axially securingly rest against a hub end face at the end where the shaft terminates.

Abstract: A non-rotating and axially secured connection between an inner joint part of a constant velocity joint and a driveshaft has an inner joint part at its outer circumference with tracks for receiving torque-transmitting balls or tripod arms for sliding on rollers, as well as a central bore with inner teeth. The driveshaft is inserted into the bore and is provided with corresponding outer teeth. At the end of the inner joint part facing the shaft end, the bore, with its inner teeth, changes into a through-hole with a smaller diameter. At the end of the driveshaft in front of the outer teeth, a cylindrical portion is provided carrying an axial securing mechanism.

Abstract: A constant velocity universal joint of the tripode type includes a roller assembly arranged on the tripode arm which is secured against unintentionally disengagement with the tripode arm. A pressure disc is provided which holds the roller assembly together as a unit and whose shape, relative to the ideal round shape, deviates radially inwardly. The radially inwardly directed deviation in shape is designed with a slightly smaller width of opening than the dimension corresponding to the maximum outer diameter of the spherical arm. In this way it is ensured that the roller assembly on the spherical tripode arm is self-holding after having been mounted.

Abstract: The area pressure in a constant velocity universal joint of the tripode type is reduced to improve the lubrication conditions. The ends of the arms of the inner joint part facing the two directions of rotation of the joint arms are each provided with a face extending parallel to the longitudinal axis of the joint and to the axis of the respective arm. The inner is produced by a forming tool divided into two parts. The workpiece is journal-shaped and when shown in an axial section, comprises a convexly curved outer circumference. The pressing and/or forging burr is formed in such a way that the use of the workpiece is not adversely affected and therefore subsequent machining of the burr is not required. In the region of the burr, there is the face as a result of which the burr, relative to the outer contour, is displaced radially inwardly.

Abstract: A drive assembly for a motor vehicle, having two drivable axles, a first axle being driven permanently by a drive unit and at least a second axle being connectable via a double coupling assembly so as to be externally controllable. The double coupling assembly comprises a common drivable coupling carrier with outer plates and individual sets of inner plates each connected to the axles of the second driving axle. The double coupling is actuated by a common actuating device, thereby permitting both sets of plates of the double coupling to be loaded by the same amount of actuation forces.

Abstract: A device for switching on a drive train in a motor vehicle has a power divider for several drive trains, one of which is permanently coupled with a drive unit and the other of which can be connected to the drive unit. The device also has an input shaft (2, 42, 82, 142) and an output shaft (4, 44, 84, 144) which can be connected to the input shaft (2, 42, 82, 142) through a switchable coupling (10, 50, 90, 150) in the form of an axially actuated friction clutch. The friction clutch is actuated by two rings (28, 30; 68, 70; 108, 110; 168, 170) which are coaxial with the clutch disks and which can be rotated relative to each other through 180.degree.. One ring is an axially supported support ring (28, 68, 108, 168) and the other ring is a pressure ring (30, 70, 110, 170) which slides axially on one of the shafts. The rings bear against each other on paths which can be varied axially around the periphery.

Abstract: Apparatus with a force- or moment-generating actuating member, operating electromagnetically or electromotively and a mechanical transmission arrangement, rotating of sliding, working on an actuation arrangement of a friction clutch or brake, characterized by a drive or control arrangement which excites a pulsating force or a pulsating moment on the mechanical transmission arrangement member.

Abstract: A process for continuously controlling the degree of locking of open differential drives in a driven axle of a multi-axle vehicle, in the case of which a nominal value .DELTA..sub.v soll of the differential speed at the wheels driven via the differential gear is determined as a function of the vehicle speed v.sub.F determined at the non-driven wheels and which records the wheel speed differential .DELTA..sub.v ist between the wheels driven via the differential gear, which wheel speed differential .DELTA..sub.v ist is readjusted by varying the locking effect on the nominal value .DELTA..sub.v soll of the differential speed always deviating from zero.