Abstract: An electrohydraulic steering system includes a steering unit, triggerable via a user control element, for supplying a steering motor with pressure fluid. As a function of the actuation of the user control element or as a function of an external signal, the steering motor can be supplied with an additional quantity of pressure fluid via a steering valve. A blocking valve is located in the flow path of the additional pressure fluid and can be put in a blocking position in order to block the flow path of the additional pressure fluid to the steering motor.

Abstract: A network station for a data network for receiving external data and for transmitting device-internally prepared data has a repeater for transmitting an external data packet received at a data input to a data output, a first data preparation unit for transmitting an internal data packet generated from the prepared data via the data output, having a switching device for interrupting the data path between the data input and the data output, a control unit that is connected to the switching device in order, in a first operating mode, to block the transmission of the received external data packet via the data output if the internal data packet is currently being transmitted via the data output by the data preparation unit, and to permit the transmission of the received data packet by the repeater via the data output if no internal data packet is currently being transmitted via the first data preparation unit.

Abstract: The handle for the remote control of a moving vehicle, particularly a civil engineering works vehicle, an agricultural vehicle or handling vehicle according to the invention comprises a control device of the proportional type (4) including an actuating part (5) that is able to move relative to a body (6) integral with the handle, and return means (11) for returning the actuating part (5) to a rest position.

Abstract: The invention relates to an electric drive (19) provided with a drive regulator (5), an electromotor (9) and a control device (3, 4, 7, 8) which is used to detect and monitor the threshold value of axis-relevant, electrical/mechanical operational state variables, and preventative error diagnosis. The control device (3, 4, 7, 8) comprises an additional monitoring device (6) which can analyze the operational state variables in order to recognize, at an earlier stage, possible deviations from tolerance ranges and to process the analysis results.

Abstract: Disclosed is a hydraulic control arrangement for damping wagging vibrations, wherein during operation a hydraulic cylinder of a lifting equipment can be connected to a hydraulic accumulator via a damping valve arrangement. The damping valve arrangement comprises a nozzle valve arrangement with two different nozzle cross-sections, the larger of which is active when filling the hydraulic accumulator and the smaller of which is active during adaptation of the hydraulic accumulator to the load pressure of the hydraulic cylinder.

Abstract: In the case of a measuring device having a sensor supplied from an oscillator for a non-electrical variable and having a circuit arrangement downstream of the sensor for rectifying the output voltage of the sensor, interference pulses, which are superimposed on the output voltage of the movement sensor and are rectified when the output voltage of the movement sensor is rectified, falsify the measurement result. This is particularly true for spiked interference pulses having a high amplitude. In order to reduce such falsifications of the measurement result, the output voltage of the sensor is supplied to a ramp-generating circuit arrangement, in which the mathematical sign of the transmission behavior can be controlled. The mathematical sign of the transmission behavior of the ramp-generating circuit arrangement is controlled by a switching signal, whose flanks correspond to the zero crossings of the output voltage of the sensor.

Abstract: There is disclosed a pilot valve, especially for a servo valve, comprising an actuating motor and a hydraulic preamplifier via which a control pressure difference can be created that acts upon a main slide of a main stage. According to the invention, a blocking mechanism is embodied in the flow path of the control oil. A control duct that is connected, either directly or via a branch, to a control chamber of the main stage can be blocked by manually actuating said blocking mechanism, while the other control duct remains open. The other control duct can be blocked by actuating the blocking mechanism in the opposite direction while the first control duct remains open. A control pressure difference by means of which the main slide can be displaced into a predetermined position can be created manually by actuating said blocking mechanism.

Abstract: The invention concerns rotary control device for remote control of a moving vehicle, particularly a civil engineering works vehicle, an agricultural implement or a goods handling vehicle comprising two parts rotatably mobile relative to one another about an axis (A) and formed of a body (2) intended to be fixed to the handle of the remote control and an actuating part (6), the device also comprising first elastic means (13) including a winding (14) and two mobile branches (15, 16), the first actuating part being immobilized, in a position of equilibrium (P), with respect to a first member (2, 6). The device further comprises second elastic means (22) supported, on a mobile branch (15, 16) of the first elastic means (13) and, designed, in the position of equilibrium, to bear against a support portion (24) of the second member (2, 6).

Abstract: A hydraulic control arrangement is disclosed for the load-independent control of a consumer with a continuously adjustable distribution valve having a pressure compensator down the line. According to the invention, the pressure compensator has a single-sided damping such that the movement in the opening direction is damped and the movement in the closing direction is substantially undamped. Furthermore, a control arrangement is disclosed in which a load-holding function is integrated in the pressure compensator.

Abstract: What is disclosed is a hydraulic control system for a mobile equipment, in particular for a wheel or backhoe loader, wherein a shovel is linked to a boom. The angular position of the shovel may be kept constant through the intermediary of an orientation control device during a pivoting movement of the boom relative to the axles of the equipment. In accordance with the invention, the orientation control device is realized such that in the event of a change of a pre-set angular position, a control signal is generated through a pilot control device, whereby a shovel control unit may be controlled in such a manner that the shovel is again returned into its predetermined angular position.

Abstract: A switch unit having a combined switch function and locking function for controlling industrial tools, both the locking function and the switch function being achieved magnetically.

Abstract: On a work appliance, an extension arm is held rotatably, and a scoop is held rotatably on the extension arm. Actuation of the extension arm and of the scoop is by means of hydraulic cylinders. Each cylinder is assigned a valve which controls the flow of pressure medium from a pump to the cylinder and from the latter to the tank. A rotational movement of the extension arm is accomplished with the top edge of the scoop maintaining its angular position when the extension arm is being raised or lowered. Valves which control the flow of pressure medium to the cylinders are activated with the ratio of the pressure medium quantities supplied to the cylinders being kept at a constant value independently of the size of the control signal controlling the flow of pressure medium to a cylinder for the actuation of the extension arm.

Abstract: A linear guide device has a guide rail, a guide carriage having a rolling element recirculating channel, at least one endless row of rolling elements circulating in the rolling element recirculating channel and guiding the guide carriage on and along the rail, wherein the rolling element recirculating channel includes a load-bearing channel section and turnaround channel sections which connect the load-bearing channel section and a return channel section with each other, wherein the guide carriage includes substantially in a longitudinal region in the load-bearing channel section and the return channel section, a carriage body, end piece units provided on axially opposed ends of the carriage body, intermediate piece units located between the carriage body and the endpiece units, a groove element provided in the return channel section, which encloses rolling elements located in the return channel section around at least a portion of their circumference, and wherein the groove element is integrally formed in at

Abstract: What is disclosed is a hydraulic controller arrangement for the pressure medium supply of a hydraulic consumer, e.g., of the rotating gear of a mobile work machine. At low pressure medium flow rates, the pressure medium flow rate draining from the consumer is backed up by means of a drain backup valve having the form of a pressure limiting valve and throttled accordingly, so that a back pressure is generated which is capable of preventing an advance of the mass actuated by the hydraulic consumer.

Abstract: A conveyor system includes a conveyor track and at least one workpiece carrier that includes a first control curve and a second control curve, and a first control curve tracker and a second control curve tracker that are assigned to the conveyor track. The first control curve tracker is arranged in a first control engagement with the first control curve, and the second control curve tracker is arranged in a second control engagement with the second control curve. The control curves and associated control curve trackers are arranged so that the at least one workpiece carrier can be deflected laterally off of a subsection of the conveyor track via the interaction of the first control engagement and the second control engagement.

Abstract: A directional control seat valve includes a piston that is biased against a valve seat by means of a spring. The piston is associated with a compensating piston whose end face subjected to the pressure at one of the ports of the directional control valve is arranged before the valve seat when viewed in the closing direction.

Abstract: A three-phase machine has a primary part having N grooves and m electrical phase windings; a secondary part having a number p of pole pairs (P1-P4), each comprised of two magnetic poles of different polarities; wherein the pole gap is essentially the same for all of the pole pairs (P1-P4) and results from an even distribution of all of the poles on the secondary part; and at least one pole pair (P1-P4), with no change to its pole gap, is shifted by a predetermined distance in relation to an equidistant distribution of all of the pole pairs.

Abstract: The invention relates to a hydraulic distributor comprising a casing, a pressurized fluid inlet, a fluid return port, at least two working ports, a slide which is housed in the casing, a passage which is provided in the casing in order to connect the inlet with the working ports, adjustment means which are connected to a load detection line channel, a supply bridge which opens into the slide hole on either side of the inlet chamber, and two main check valves which are borne internally by the slide, The inventive distributor further comprises two secondary check valves which are mounted in the longitudinal channels upstream of the main check valve heads and which are connected to torque slits which open into the hole in which the slide moves.

Abstract: There is disclosed an adjusting device for a valve, especially a pressure control valve, comprising an axially displaceable control member on which a control spring acting on a valve body of the valve is supported. The control member is in rotational engagement with a catch connected to a handle for adjusting the control spring biasing. In accordance with the invention, the rotatable handle is connected to the catch such that first a radially projecting locking member is inserted in a recess in axial direction and subsequently is brought into an axial locking position by a relative displacement so as to lock the handle in axial direction with the catch.

Abstract: What is disclosed is a pilot-controlled pressure feed valve comprising a main stage and a pilot control stage, wherein the main stage comprises a piston that is biased into a closed position. The piston is provided with a piston bore through which an input port may be connected with a rear-side spring chamber. To this piston bore a throttle valve means is associated which provides a comparatively small cross-section of flow for the control oil in the pressure limiting function of the pressure feed valve, and a comparatively large cross-section of flow in the anti-cavitation function.