Abstract: The invention concerns a vehicle with an attachment, which has a lifting drive with at least one hydraulic cylinder and a control device, the control device having a position sensor and a position generator. It is endeavoured to improve the position control of the attachment. For this purpose, the control device has a trajectory generator, which generates a trajectory in dependence of a desired position value and an acceleration limit, said trajectory being optimised with regard to a time specification, and a follower, which controls the lift drive in dependence of the trajectory.

Abstract: A rotary fluid pressure device has a first oil passage with relatively high pressure fluid therein surrounding the gear set; a plurality of second oil passageways connecting the first oil passageway to the expanding and contracting oil chambers; and fluid non-return valves in each of the second oil passageways to permit the flow of oil therethrough only in a direction from the first oil passageway to the oil chambers.

Abstract: The invention concerns a hydraulic valve arrangement with a supply connection arrangement, which has a high-pressure connection (P) and a low-pressure connection (T), a working connection arrangement, which has two working connections (A, B), which can be connected with a consumer, a directional valve and a compensation valve arranged between the directional valve and the supply connection arrangement, the pressure outlet of the compensation valve being connected with a pressure inlet of the directional valve. It is endeavoured to avoid dangerous situations, which occur because of uncontrolled pressures. For this purpose, it is ensured that the compensation valve has a relief outlet, which can be connected with the pressure outlet.

Abstract: Method of automated measurement of the ohmic rotor resistance (Rr) of an asynchronous machine (1) controlled via an inverter (8) while being acted upon by a non-rotating field, the method involving a. measuring the ohmic stator resistance (Rs), the leakage inductances (L&sgr;s, L&sgr;r) and the main inductance (Lm) of the asynchronous machine, b. leading a testing signal (Usa) being formed by a predetermined direct signal with a superimposed alternating signal corresponding approximately to the nominal slip frequency (fs) of the asynchronous machine (1), c. measuring the amplitude and the phase (&phgr;) of the phase signal (Isa) resulting from the testing signal, and d. calculating the ohmic rotor resistance (Rr) from the measured values according to a) and c).

Abstract: A brake appliance for gerotor motors has a disc assembly brake comprising interacting discs that are subjected to opposing forces from pressurized fluid in one direction to disengage the discs, and from primary and secondary spring forces in the other direction to engage the discs.

Abstract: The invention concerns a water purification device with a fluid pump, a diaphragm unit having a diaphragm, which separates a primary side from a secondary side, and a consumer having a pressure requirement, the fluid pump being connected with the primary side and the consumer being connected with the secondary side. It is endeavoured to supply the consumer with water under a high pressure. For this purpose, the fluid pump supplies the pressure (P2) for the consumer through the diaphragm.

Abstract: A clamp for connecting a cylindrical temperature sensor axis-parallel with a tube has a bendable metallic tension band which tension band on its one end portion has a first jaw and at its other end section is shapewise connectable with a second jaw, and which clamp also has a tension screw. The tension screw is inserted through a bore in the first jaw and is threaded through a threaded bore in the second jaw. To be able to connect the sensor and tube rigidly with little heat transfer resistance the second jaw has a bent plate with two legs. The first leg is provided with the threaded bore and the second leg with a slot through which the other end section can be passed. The tension band length is so chosen that the other end section after the wrapping of the tension band around the temperature sensor and the tube as well as its being passed through the slot is bendable down onto the second leg. The tension screw length is so chosen that after its tightening it lies on the bent down end section.

Abstract: Device for measuring an electrical current (I) that flows through a strip conductor (1), with a current-less measuring conductor (3) extending in the flow direction of the current, along and in the proximity of a measuring section (2) of the strip conductor (1), one end of the measuring conductor (3) being electrically connected with one end of the measuring section (2), the other end of the measuring section being provided with a first measuring point (4), and with a second measuring point (5) being electrically connected with the other end of the measuring section (2), characterised in that the measuring section (2) is rectilinear, that the second measuring point (5) is connected directly with the measuring section (2), and a voltage (U) is taken from the measuring points (4, 5).

Abstract: A current sampling half-bridge output driver capable of driving a wide range of loads using an accurate selection of current sensing resistors. Pluralities of stages are connected in series with the current sensing resistors from each stage connected in series. A range selector selects the stage appropriate for each current load. The reference resistors for a selected stage includes the current sensing resistor associated with that stage added in series to all current sensing resistors electrically connected between the selected stage and the load. The disclosed circuit avoids switching resistors in and out of the circuit and thereby increases the accuracy of the sensing resistor circuit.

Abstract: The invention concerns a suction muffler for a hermetically enclosed compressor with a housing that has at least a first and a second chamber, separated from each other by means of a division wall and connected with each other by means of a throttling channel, which is designed to allow flow from the first to the second chamber. The throttling channel includes a lateral opening, which opens into a chamber via a branch channel.

Abstract: A system for automatically holding a predetermined course in a vehicle with a two-train hydrostatic traction drive, comprising a measurement device (5) for detecting the actual rotational movement of the vehicle around a vertical axis of the vehicle, and for providing a first signal representing the rotational movement. An electronic controller (1) operatively associated with the measurement device (5) to evaluate the first signal to determine the deviation of the first signal from the predetermined course of the vehicle to form a control signal to hydrostatic transmissions of the two-train hydrostatic drive to operate and to provide a course correction.

Abstract: A nozzle, especially an atomizing nozzle for an oil burner, has a housing with a nozzle opening, and a distributing insert which from the interior of the housing lies on the housing in the area of the nozzle opening and is held in the housing with the help of a deformed housing section. To better assure the functioning of the nozzle an elastically deformable element is arranged between the housing section and the distributing insert.

Abstract: A vehicle driving arrangement with at least two axes, each having at least one driven wheel that can be acted upon with a torque of a motor, the motor/motors of each axis being arranged in a supply line, the supply lines being parallel to each other and connected with a pump device, and a valve arrangement being arranged in at least one supply line. It is desired to improve the operability of a hydraulically driven vehicle. For this purpose, the valve arrangement in one supply line has a pressure reducing valve that limits the pressure difference over the other supply line to a maximum value.

Abstract: The present invention discloses a system for non-contact measurement of vibrational motion in a vibratory compacting machine. The system includes a vibrating element such as a roller drum adapted for vibrational motion and a non-contact sensor positioned a distance from the vibrating element and adapted for sensing the vibrational motion of the vibrating element. The present invention also discloses a method for non-contact measurement of vibrational motion of a vibrating element in a vibrating element that includes sensing position information of the roller drum with a non-contact sensor positioned a distance from the vibrating element and determining at least one vibration characteristic based on the position information sensed with the non-contact sensor.

Abstract: A transmission has an HMT which is in parallel with an HST both driving two planetaries which are used for forward/reverse and for differential steer. A two or three mode HMT is created by having a first HST in parallel with two or three mechanical power paths defined by separate clutches. One clutch has a speed reversing gear to produce reverse output speed. A four-element planetary sums the parallel flow and delivers variable speed and torque to two output shafts. The differential steer is created by two planetaries connected with the outputs of the HMT and a second HST. The planetaries have a speed reversing gear on one power path connection. The second HST controls the differential speed between the output shafts by adding speed to one and subtracting speed from the other.

Abstract: A hydraulic motor of the disc valve type has a disc valve with a plurality of commutation slots that can sequentially register with ports in a port plate as the disc valve is rotated with respect to the port plate. The commutation slots have a geometrical configuration that is complimentary in shape to a portion of the geometric configuration of the ports in the port plate to reduce the resistance to fluid flow through the ports and the slots when the complimentary shapes move into or from superimposed registering positions.

Abstract: A gerotor motor has a housing located adjacent a port plate. The housing has two fluid chambers on opposite sides of a disc valve. The disc valve is in sealing surface engagement with the port plate to prevent fluid from moving between the fluid chambers. The valve assembly has forward and rearward sides and has substantially equal volumes of material removed therefrom so as to balance the port plate against any torsional forces imposed on the valve assembly which might otherwise deflect the valve assembly to interfere with its sealing relationship with the port plate.

Abstract: Compressor, comprising a sealed outer casing, inside which is arranged a gas compression stage driven by a motor arranged inside the outer casing. The lower part of the inner casing containing the motor is sealingly closed by a bottom, and at least one vertical chimney is arranged in the annular space formed between the outer casing and the lower casing, the chimney being arranged substantially vertically along the motor and the lower casing, and communicating in its upper part with the low-pressure zone of the compressor and, in its lower part, with the inside of the lower casing, one or more openings being made between the chimney and the bottom of the motor.

Abstract: A piston for use in the cylinder block of a hydraulic power unit. The piston has an elongated cylindrical body with one end configured to connect with a slipper element. The second end of the piston is open with an annular cavity in the piston body defining an elongated stem extending from the head end of the piston and slightly protruding through the open end. The stem is concentrically located within the longitudinal axis of the annular cavity and has an elongated fluid conduit that extends longitudinally through the stem and completely through the piston. The fluid conduit traverses the piston body along the center axis, providing a path for pressurized fluid. The piston is composed of a unitary cast construction.

Abstract: An axial valve has a housing, an inlet, an outlet, a valve seat between the inlet and the outlet, and a valve element cooperating with the valve seat, and is controlled by a pilot valve arranged between the inlet and the outlet, with the valve element being moveable parallel to a flow path from the inlet to the outlet and surrounding an interior space. Without changing the external measurements of the valve an increased through flow is achieved in that a first section of the flow path leads through the interior space and a pressure space is arranged between the housing and the valve element, in which pressure space in the closed condition of the pilot valve a closing pressure is formed and applied to the valve element.