Abstract: The DC-DC converter circuit has a converter unit for conversion of an input voltage to an output voltage; a first capacitor for maintaining a value of the output voltage for a predetermined holdover time; a charging circuit for charging the capacitor with a supply voltage that is greater than the input voltage and a discharging circuit for providing charge to the converter circuit from the charged capacitor when the input voltage is interrupted, whereby the output voltage is maintained for a predetermined holdover time.

Abstract: The invention relates to a manipulator control handle with is intended to control at least one electrohydraulic device. The inventive handle consists of: a casing defining a cavity therein; at least one set point generator comprising generator means which are used to deliver a set point signal and which are disposed in the cavity of the casing; and cursor-forming means which are disposed on the surface of the casing and which are intended to be actuated by an operator. According to the invention, the value of the set point signal delivered is related to the movement of the cursor-forming means in order to control the electrohydraulic device. The handle also comprises an electronic power board which is built into the cavity of the casing and which converts the set point signal into a power signal with a power greater than that of the set point signal, said power signal being delivered to the electrohydraulic device.

Abstract: A drive device has a drive element movable axially by means of an electric motor and a hydraulic unit. In the drive device it is important to execute a rapid adjusting movement and then to exert high forces. This causes high reaction forces on the lifting spindle. High reaction forces are avoided if a force intensifier with two pistons movable in relation to one another and differing from one another in the size of their active surfaces along with an intermediate part which, together with the pistons, encloses a pressure space filled with a pressure fluid is used, if the smaller active surface is connected mechanically to the drive element, for the adjusting movement, the hydraulic unit can be moved as a whole, and if, for exerting a high force by means of the larger active surface, the intermediate part can be blocked against displacement in relation to a fixed stand.

Abstract: A drive device for closing unit, injection unit or ejectors of a plastics injection molding machine, has a drive element which is axially moveable, and a hydraulic unit which is moveable by the drive element in the same direction as the drive element. The hydraulic unit is a force multiplier with a large piston and a first small piston, which are moveable in relation to one another and differ in size of their effective surface areas. An intermediate part together with the pistons encloses a pressure chamber filled with a pressure fluid. The first small piston is mechanically connected to the drive element. A second small piston with the intermediate part define a fluid chamber connected by a valve, in one embodiment, to the pressure chamber. The hydraulic unit as a whole is moveable for the positioning movement and the intermediate part is blockable against displacement in relation to a fixed frame.

Abstract: A connection (10) of two streamlined-section struts (12, 14) running orthogonally to one another with an essentially rectangular base cross section (18) uses a connector (16). The lateral surface (18a) of one (14) of the streamlined-section struts has a mounting groove (18b), as well as an edge flange (18c), which projects substantially orthogonally from an edge of this lateral surface (18a) at a predetermined distance (b). The connector (16) can be attached to the lateral surface (18a) of the one streamlined-section strut having the mounting groove (18b) and to the front side of the other streamlined-section strut (12). The contour of the connector (16)is accommodated substantially completely within the base cross section (18) of the other streamlined-section strut (12). In addition, the depth of the connector (16) is essentially the same as the predetermined distance (b).

Abstract: What is disclosed is a a pressure limiting valve comprising a valve body, the axial movement of which is damped by means of a damping device. In accordance with the invention, the damping device includes a damping chamber formed on the return side, that is subjected to the system pressure acting on a pressure port.

Abstract: An actively externally cooled housing with at least one electronic component having heat-dissipating capacity, has a ventilation inlet located outside the housing, the ventilation inlet generating an airflow that is guided through a lateral flow channel, the flow channel being located on any side wall of the cooled housing on which at least one electronic component with heat-dissipating capacity is located, wherein the ventilation inlet is located in a ventilation housing that is located on the top side of the active-cooled housing and has a lateral air outlet that leads into the lateral flow channel, whereby an air intake occurs through only one air inlet opening that is located on the underside of the ventilation housing and which is essentially open vertically downward, so that the ventilation unit is located in the ventilation housing in such a manner that it is protected against impurities in the ambient air

Abstract: A directional control valve for a hydraulic load has, in a piston bore of a valve housing, a control piston which can be displaced axially in opposite directions from a central position and which has first fine control grooves for opening a connection between a load chamber and a feed chamber. There are second fine control grooves for opening a connection between a load chamber and a discharge chamber of the piston bore under control. In its central position, there is a restricted relief connection from a load chamber to the discharge chamber via the control piston. The restricted relief connection is obtained via a recess in the control piston, independently of the second fine control grooves.

Abstract: What is disclosed is a linear solenoid, the magnetic force of which is adjustable from outside in the mounted condition through an axial translation of a component which i's in operative connection with a pole tube and defines an overlap range with a housing jacket, and a magnetic valve equipped with such a linear solenoid.

Abstract: What is disclosed is a a damping device, in particular for cable-supported structures such as, e.g., cable-stayed bridges, stadium roofs, guyed towers, comprising a differential cylinder, two hydraulic units, and an electric motor, wherein during damping the one hydraulic unit acts as a motor, and the second hydraulic unit acts as a pump, with surplus hydraulic energy being convertible into electric energy through the intermediary of the electric motor.

Abstract: What is disclosed is a hydraulic unit for a plastics processing machine, in particular a hydraulically actuated injection molding machine. In accordance with the invention, the drive mechanism of a pump of a hydraulic circuit is provided inside the tank to ensure optimum acoustic and vibration attenuation.

Abstract: The invention relates to a primary part (1) or secondary part (31) of an electric motor (2), having a core (3) of a magnetically conductive material, which forms slots (4) for the windings (5), and at least one cooling tube (6), through which a coolant fluid (7) can flow, is inserted into the slots (4) under the windings (5).

Abstract: The drive mechanism (10) has a drive member (12) and a flexible conveying member (14). The engaging elements (12b) of the drive member (12) have an engaging element spacing (t1), while the associated counter elements (14b) of the conveyor member 14 have a counter element spacing (t2). According to the invention the engaging element spacing (t1) of the engaging elements (12b) is larger than the counter element spacing (t2) of the counter elements (14b) of the conveying member in order to compensate for conveyor member stretching in operation. In a preferred embodiment the conveying member is a flexible conveyor chain and the drive member (12) is a toothed drive wheel. In another preferred embodiment the ratio of the engaging element spacing (t1) of the drive member (12) to the counter element spacing (t2) of the conveying member (14) is between about 1.01 and about 1.10.

Abstract: An apparatus for detecting the presence of a workpiece carrier in a predetermined track portion of a workpiece carrier transporting path has a housing, a slider which is displaceably guided in the housing and is displaced by the workpiece carrier, at least one proximity switch which is releasable by the slider, two turning elements provided with teeth and arranged on the housing, each of the turning elements being supported turnably around an axis provided on the housing, the turning elements being in tooth engagement with one another, the turning elements being also in tooth engagement with linear tooth sets provided on opposite sides of the slider and extending in a linear displacement direction.

Abstract: The invention relates to a rolling bearing arrangement for an electromotor having a rotationally symmetrical rotor arranged rotatably inside a stator, there being provided for rotationally bearing the rotor. At least one standard rolling bearing that has an outer race which is arranged in a bearing seat in a fixed position relative to the stator and which cooperates via a rolling body arrangement with an inner race arranged on a shaft of the rotor. The bearing seat is lined with an insulation arrangement in order to avoid a flow of current between stator and rotor, the insulation arrangement having a thin, sheet-type semifinished product having insulation material resistant to the radial pressure force of the bearing.

Abstract: The invention concerns a fluid distributor, in particular a hydraulic manipulator comprising a body (5), a pressure reducing valve (2) mounted in the body comprising a plunger (3) mobile in translation and whereof the displacement is controlled by a push-rod (11), a control member (6) including at least one finger (10) for modifying the position of the push-rod, means forming a solenoid (15) mounted in the body, a frame (16) adapted to be driven in translation simultaneously with the push-rod. The dispenser further comprises means for catching (20) the frame on the finger delimiting a window wherein the finger projects substantially transversely, the push-rod being mounted so as to pass right through the frame and project into the window, and the finger being interposed between the catching means and the push-rod.

Abstract: A conveying device (10) for transporting transported goods includes at least one profile rail (12), at least one transported goods support (14) that is supported by the at least one profile rail and is moveable along the profile rail, and a drivable conveyor unit (16) extending along at least one profile rail (12), whereby the at least one transported goods support (14) has at least one engagement unit (20), which is in locked-in engagement with the conveyor unit (16) or can be brought into locked-in engagement with the conveyor unit. The engagement unit (20) has an engagement element (24) revolving about a bearing unit (22), and in addition, a coupling assembly that effects the revolving movement of the engagement element (24) is provided.

Abstract: A pneumatic gate valve includes a valve housing made of injection-molded plastic material and having a plurality of external ports. Received in the valve housing are a plurality of valve bushings disposed in axial-spaced relationship as to define a valve bore and a plurality of pressure fluid compartments in fluid communication with the ports. A slide member for regulating a flow of compressed air between the ports is accommodated in the valve bore of the valve housing and displaceable in axial direction. The valve bushings are made of plastic material with a same melting temperature as the plastic material of the valve housing so as to realize a material union between the valve bushings and the valve housing, when plastic material is molded around the valve bushings during injection molding of the valve housing.

Abstract: A linear guide device has a guide rail, a guide car reciprocatingly movable on the guide rail in a longitudinal direction, a roll body revolving unit in which an endless row of roll bodies revolve, the roll body revolving unit having a load supporting portion which the roll bodies come in the load supporting engagement with a guide path of the guide rail and also with a running path of the guide car, the running path of the guide car being formed on a running path element which is connected with the guide car and which at least on a roll body entry-side end has a free supporting portion which is not supported on the guide car, the free supporting portion having a length which is at least equal to a diameter of the roll bodies.