Abstract: A device (10), which is for holding a transport unit (W) that moves in a transport direction (T), includes an actuator (16) equipped with a drive unit (16c/16d) and an actuating element (16a), which, in an extended position, can be brought directly or indirectly into a holding engagement with the transport unit (W); a sensor unit (22) that is situated before the actuator (16) and a sensor unit (24) that is situated after the actuator (16), both of which are for detecting the presence of a transport unit (W); and a control unit (28) for receiving the detection results of the transport unit sensor units (22, 24) and controlling the actuator (16), wherein the two sensor units (22, 24), the control unit (28), and at least the drive unit (16c/16d) of the actuator (16) are integrated into a shared housing (12).

Abstract: What is disclosed is a hydraulic control system for controlling a hydraulic consumer actuating a working tool of a mobile equipment that is provided with oscillation damping means for attenuating oscillations during braking of the working tool. In accordance with the invention, the oscillation damping means comprise two pilot-controlled shut-off valves arranged in opposite directions, that are positioned in a connecting line between a pressure medium supply and a pressure medium drain. The shut-off valves are subjected to the pressure in the drain and in the delivery, respectively, in the opening direction, and also to this pressure and to the force of a spring in the closing direction. Following a predetermined initial stroke of a regulator of the control system, the pressure acting on the drain-side shut-off valve in the closing direction may be reduced, so that the latter is opened by the pressure in the drain, and the connecting line between delivery and return is opened.

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: The invention relates to a device (1) and a method for the controlled braking of a vehicle using a hydrostatic drive (3). The hydrostatic drive (3) comprises at least 2 pivotable hydraulic engines (6) that are each connected to an axle of the drive (3) and are driven by a hydraulic pump (5). The braking torque is carried out primarily by means of the actuating element (16) of the braking system. The excessive braking or blocking of individual wheels is prevented by an antiblocking function. To this end, the actual rotational speed of each individual hydraulic engine (6) is compared with a nominal value and the resulting regulating deviation (F) is converted by means of a regulator into a regulating variable (R) which superimposes the primarily defined control variable (S). The dynamic axle load displacement is taken into account as a result of the deceleration of the vehicle.

Abstract: An electro-hydraulic control device is equipped with a valve and with activating electronics for the electrical activation of the valve as a function of a control signal. A sensor component or actuator component which is held on the valve, is connected to the activating electronics by means of an electrical connecting line. A non-volatile data memory is arranged on or in the sensor component or the actuator component, and the data of the data memory can be read out via the electrical connecting line.

Abstract: The invention relates to a method of controlling a hydrostatic drive (1). Said hydrostatic drive (1) comprises a hydraulic pump (3) and a hydraulic engine (7). Said hydrostatic drive (1) also comprises a first and a second hydraulic reservoir (40, 41) for storing and recuperating energy. Pressure energy is stored in the first reservoir (40). For the purpose of recuperating the pressure energy stored in the first reservoir (40), said first reservoir (40) is connected to a suction side of the hydraulic pump (3). A downstream working line (8, 9) of the hydraulic engine (7) is connected to the second reservoir (41). In addition, the downstream working-line connection (9, 8) of said hydraulic engine (7) is disconnected from the suction side of the hydraulic pump (3).

Abstract: Disclosed are a control arrangement and a method for the pressure medium supply of at least two hydraulic consumers that are supplied with pressure medium through the intermediary of a variable displacement pump. In the pressure medium flow path between the consumers and the variable displacement pump a respective meter-in orifice is provided. An adjustment of the variable displacement pump and of the meter-in orifices takes place electronically through the intermediary of a control means in dependence on the target values input by an operator. In accordance with the invention, the meter-in orifice associated with the consumer having the highest load pressure is controlled to open completely, so that the pressure loss across this meter-in orifice is minimum.

Abstract: A power-supply apparatus for outputting from an output terminal via one or more switching elements, each having a control electrode, a voltage input to an input terminal, is disclosed. The apparatus includes a voltage-generating circuit for generating an output voltage Vo proportional to a voltage between an input end and an output end of the switching element so as to output the generated voltage, and a control circuit for controlling an operation of the switching element depending on the output voltage Vo of the voltage-generating circuit. The control circuit causes the switching element to reduce an output current when the output voltage Vo of the voltage-generating circuit exceeds a predetermined voltage Vs.

Abstract: The invention discloses a hydraulic control arrangement for controlling a number of consumers, particularly of a mobile working machine. In addition to the consumers of the control arrangement, an additional consumer should be able to be connected to a power beyond port. All consumers and power beyond consumers are supplied with hydraulic fluid by a pump. An input pressure scale is provided downstream of the pump, and the greater of the load pressures of the consumers or of the at least one power beyond consumer is applied to the control port of said input pressure scale.

Abstract: Disclosed is a drive unit, in particular for an injection unit or an ejector of an injection molding machine, comprising a stroke spindle device with a spindle and a spindle nut, and a prestressing device for prestressing the spindle that is dischargeable in a displacement phase of the stroke spindle device and is chargeable when the spindle is driven in the opposite direction, wherein the stroke spindle device and the prestressing device are supported by the same component, and wherein a load measuring device is provided for measuring the load acting on the spindle, which absorbs the forces acting on the component.

Abstract: The invention relates to a hydrostatic drive (1) and to a method of braking a hydrostatic drive (1). In the hydrostatic drive (1), in a closed circuit a hydraulic pump (3) is connected by a first and a second working line (11, 12) to a hydraulic motor (4). The hydrostatic drive (1) comprises a brake actuation device (37) as well as at least one pressure relief valve (26, 30), which is connected to the working line disposed downstream of the hydraulic motor (4). The hydraulic pump (3) upon detection of an actuation of the brake actuation device (37) is adjustable to a braking delivery rate. The hydraulic motor (4) is adjusted in dependence upon the actuating intensity of the brake actuation device (37) in the direction of a larger absorption volume if the actuating intensity of the brake actuation device (37) increases.

Abstract: There is disclosed a sealing bush as well as a hydraulic unit fitted with said sealing bush and a check valve. The sealing bush is made of plastic and has, on an end face, a preferably conical elevation that can be brought into sealing contact with a bearing shoulder.

Abstract: An electric circuit arrangement for controlling a solenoid-operated fluid valve.

Abstract: A hydraulic control arrangement is disclosed for the control of a consumer, comprising at least one mechanically operated continuously adjustable distribution valve with a subsequent LUDV pressure compensator down the line. In order to lock the consumer the control arrangement is provided with a spring holding the pressure compensator piston in a closed position. Furthermore, the LS line carrying the highest load pressure of all consumers is connected to a reservoir by means of a flow regulator, wherein the pump control may also be relieved by the flow regulator in the sense of a reduction of the pumped volume. According to the invention, the LUDV pressure compensator is pressure-compensated by means of a nozzle through which a connection between the LS line and a portion of the pressure medium flow path downstream of the pump and upstream of the outlet of the pressure compensator is generated. Said nozzle is preferably integrated in the pressure compensator piston.

Abstract: Disclosed is an infinitely variable directional valve comprising a seat slide on which a valve cone is formed which is prestressed counter to a valve seat in the initial position of the directional valve. The directional valve is configured with a pilot control device wherefore a pilot control valve seat which interacts with a pilot control valve cone is provided inside the closing cone.

Abstract: What is disclosed is a hydraulic control arrangement for a mobile equipment, such as for a backhoe loader or a wheel loader, wherein a working tool of the equipment is adapted to be actuated by means of a hydraulic cylinder whose pressure chambers may jointly be connected with a hydraulic accumulator 14 for attenuating pitching oscillations of the working tool.

Abstract: There is disclosed a flow valve and a flow distributor for the pressure fluid supply of several consumers. Each flow valve includes a metering orifice and a pressure regulator. A pressure regulator piston of the pressure regulator is provided with two control edges one of which is active during “accumulating” of pressure fluid flows and the other is active during “dividing” of a pressure fluid flow. The flow valve moreover comprises at least one LS control edge by which a LS cross-section via which a pressure corresponding to the load pressure is indicated into a load-indicating line can be controlled to be opened when the pressure regulator is opened.

Abstract: A brake system for a mobile work tool, such as for a logging machine or a combined dredger-loader, is disclosed. The mobile work tool is provided with two non-muscular brake valves for brake actuation which may be operated by the driver in accordance with the orientation in the driver's cab—for instance during road travel and when the driver's direction of view is to the rear. In accordance with the invention, a tank port of a non-muscular brake valve is connected with the brake port of the second non-muscular brake valve, so that the first non-muscular brake valve is connected via the tank port of the second non-muscular brake valve with the pressure medium tank, and upon actuation of the second non-muscular brake valve the generated braking pressure is supplied via the tank port of the first non-muscular brake valve into the latter, so that the brake ports thereof are correspondingly subjected to braking pressure.

Abstract: What is disclosed is a hydraulic drive mechanism for a blanking or forming machine comprising a working cylinder having several pressure chambers, the piston of which acts directly or indirectly on a workpiece to be processed, wherein at least one pressure chamber of the working cylinder for retracting and extending the piston is adapted to be subjected to a tank pressure or a supply pressure via a continuously adjustable valve, and comprising a valve assembly arranged upstream of the continuously adjustable valve, whereby an inlet port of the continuously adjustable valve may be subjected to a higher or lower supply pressure, wherein the valve assembly comprises a switching valve adapted to be switched over between a basic position and a switching position in dependence on the load pressure at the working cylinder in order to tap the supply pressure from a low-pressure source or from a high-pressure source.