Abstract: A work vehicle includes a frame and an axle assembly coupled to the frame, including a first axle shaft substantially disposed in an axle housing. A first wheel couples to the first axle shaft of the axle assembly. An axle lubricating fluid is disposed within the axle housing. A cooling circuit fluidly coupled to the axle assembly circulates cooling fluid therethrough. A hydraulic motor fluidly coupled to a fluid circuit includes a device disposed in parallel with the fluid circuit to discontinue operation of the motor in response to a predetermined pressure of at least one of the first and second circuit being exceeded.

Abstract: A device for the variable setting of the control times of gas exchange valves of an internal combustion engine, having an inner rotor (3) and an outer rotor (4), with one of the components being rotationally fixedly connected to the camshaft (2) and the other component being drive-connected to a crankshaft the outer rotor (4) being rotatably mounted on the inner rotor (3) and, at least one hydraulic chamber (7), which is delimited by side walls (5, 6) and the inner rotor (3), is formed on the outer rotor (4), the inner rotor (3) comprises a hub part (3b) and at least one vane (3a), with a vane (3a) of the inner rotor (3) extending into each hydraulic chamber (7) and dividing the latter into two pressure chambers (10, 11) which act counter to one another.

Abstract: The present invention relates to a method for producing a folded core structure, particularly in the aerospace field, comprising the following steps: Initially a low-cross-linked, pre-impregnated semi-finished fibre component is provided. Subsequently heat is brought into predetermined regions of the pre-impregnated semi-finished fibre component, particularly using a laser, so as to highly cross-link the resin matrix in predetermined regions and so as to consequently generate a pattern of low-cross-linked and high-cross-linked regions in the semi-finished pre-impregnated fibre component. In a further step, of the method the pre-impregnated semi-finished fibre component is folded along the low-cross-linked regions that serve as hinges. Hereupon, the folded, pre-impregnated semi-finished fibre component is cured to the folded core structure.

Abstract: The invention relates to a hydraulic control system for building machinery, particularly for controlling hydraulic consumers of an excavator. According to the invention, pump channels which ensure that the hydraulic consumers are supplied in parallel by means of a spool valve of the main control unit of the piece of building machinery are provided in addition to previously existing pump channels that ensure said hydraulic consumers are serially supplied with hydraulic fluid. The additional pump channels are arranged parallel to the previously existing ones.

Abstract: Provided is a method for reinforcing a foam material in which a working region is first prescribed. A gap that at least partially encloses the prescribed working region in a two-dimensional manner is created in the foam material. A strut is introduced into the foam material, extending from an entry surface of the foam material from outside the working region to at least the fibrous sheet-like material. From a further aspect, a sandwich component with a core which comprises a foam material is provided. A fibrous sheet-like material arranged in the foam material at least partially encloses a working region of the sandwich component in a sheet-like manner. At least one strut is incorporated in the foam material and extends from an entry surface of the foam material from outside the working region to at least the fibrous sheet-like material.

Abstract: A method is described for controlling a hydraulic system, particularly of mobile working machine, with at least one internal combustion engine driving at least one hydraulic pump with adjustable volumetric displacement and possibly additional fixed-displacement pumps.

Abstract: With a hydrostatic multi-motor drive unit with a least two hydraulic motors acting upon a common load, a solution should be created, with which a further operating range is covered by the use of several motors and at the same time a simple as possible and problem free coupling of the motors is assured. Furthermore, a method for controlling the drive unit is indicated, which permits continuous transitions between the different operating ranges. This is achieved in that the motors (2, 3) are connected with each other through at least one freewheel device (4), in which the motor (2) arranged after the freewheel device has a variable displacement volume.

Abstract: The invention relates to a method and a device for damping the displacement of construction machines, in particular wheel loaders, comprising working equipment that is driven by means of a hydraulic cylinder, a hydraulic source, a controlled valve for supplying the hydraulic cylinder with hydraulic fluid, a regulator unit comprising control software, in addition to an acceleration sensor.

Abstract: A camshaft adjuster for an internal combustion engine with a locking element is provided. For adjusting the camshaft adjuster (1) in the direction of a locking position, for example, when the internal combustion engine is switched off or when the hydraulic pressure drops, a mechanical spring element (23) is located between the rotor (5) and stator (3). The mechanical spring element (23) is arranged in a pressure chamber (12; 13). In this way, the installation space already existing for the pressure chambers (12; 13) can have a multifunctional use.

Abstract: Interconnectable panels having tongue-and-groove connections are mechanically connected to each other by first moving two panels into an intermediate position and then pivoting one panel with respect to the other. The underside of the tongue of one panel has a depression, while the groove of another panel has a protruding lower lip. The lower lip has a projection that fits in the depression when the two panels are in the intermediate position.

Abstract: The invention relates to a hydraulic control system for building machinery, particularly for controlling hydraulic consumers of an excavator. According to the invention, pump channels which ensure that the hydraulic consumers are supplied in parallel by means of a spool valve of the main control unit of the piece of building machinery are provided in addition to previously existing pump channels that ensure said hydraulic consumers are serially supplied with hydraulic fluid. The additional pump channels are arranged parallel to the previously existing ones.

Abstract: Interconnectable panels having tongue-and-groove connections are mechanically connected to each other by first moving two panels into an intermediate position and then pivoting one panel with respect to the other. The underside of the tongue of one panel has a depression, while the groove of another panel has a protruding lower lip. The lower lip has a projection that fits in the depression when the two panels are in the intermediate position.

Abstract: An interconnectable panel has a pair of surfaces on a lateral edge that adjoins a second pair of surfaces on a complementary lateral edge of another panel when the two panels are interconnected. The edge profiles are such that the first pair of adjoined surfaces has a cross-sectional contour in the shape of a segment of a circle. The circle has a center lying in the upper sections of the connected lateral edges. The circle also has a radius measured from the center to the first pair of adjoined surfaces. The second pair of adjoined surfaces is spaced away from the center of the circle by a distance greater than the radius. That distance increases in a direction away from the first pair of adjoined surfaces.

Abstract: The invention concerns a hydraulic system for linear drives with a differential cylinder, in particular for mobile machines which through the use of displacement-control of the drives avoids the many and diverse disadvantages of the state of the art and renders possible a precise and energy-efficient control of linear drives with differential cylinders, and which is economical and simple to maintain and which can be well integrated into the total hydraulic system of such machines.

Abstract: A method is described for controlling a hydraulic system, particularly of mobile working machine, with at least one internal combustion engine driving at least one hydraulic pump with adjustable volumetric displacement and possibly additional fixed-displacement pumps

Abstract: A hydraulic steering device for vehicles, especially construction machines, with which is simple and robust mechanically and can be precisely controlled, without possessing the disadvantages of the current state of the art. A hydraulic swivelling motor for producing the steering motion, which is connected to a variable flow rate pump with reversal of its direction of delivery.

Abstract: With a hydrostatic multi-motor drive unit with a least two hydraulic motors acting upon a common load, a solution should be created, with which a further operating range is covered by the use of several motors and at the same time a simple as possible and problem free coupling of the motors is assured. Furthermore, a method for controlling the drive unit is indicated, which permits continuous transitions between the different operating ranges. This is achieved in that the motors (2, 3) are connected with each other through at least one freewheel device (4), in which the motor (2) arranged after the freewheel device has a variable displacement volume.

Abstract: The invention relates to a control device for controlling machines, especially hydraulic machines, by hand or foot. The inventive device comprises an actuating element (1), especially a pedal or a control lever, which can be moved in several directions. The aim of the invention is to feel a resisting force when the actuating element (1) is displaced or adjusted, whereby said force is on the scale of hydraulic forces having a direct effect. The actuating element (1) engages with a transmitter device (3) which is not hydraulic or is hydraulically decoupled from the hydraulic system. A damping device (6) engages with the actuating element (1). Said damping device defies the movement in at least one direction of motion pertaining to the actuating element (1) by means of a fluid that is moved by the actuating element (1).

Abstract: In a known method for bonding components made of material with a high silicic acid content by means of a substance to substance bond, a SiO2-containing bonding mass is formed between connecting surfaces of the components. In order to provide for cost-efficient manufacture of a thermally stable composite, the invention proposes to generate a SiO2-containing bonding mass that is generic with regard to the material with a high silicic acid content, comprising the following procedural steps: provision of a slurry containing amorphous SiO2 particles; formation of a slurry mass between the connecting surfaces which are fixed in position with regard to each other; drying of the slurry mass; and solidification of the slurry mass by heating under formation of the SiO2-containing bonding mass. A component assembly manufactured according to the method of the invention shows high temperature resistance and thermal fatigue resistance and can also be used in contamination-sensitive applications.

Abstract: In a known component having a reflector layer, the surface of a base body of quartz glass is covered at least in part with a reflector layer. Starting from this, to provide a component, particularly for use in lamp and reflector manufacture, which is equipped with an efficient, chemically and thermally resistant and, nevertheless, inexpensive reflector layer, it is suggested according to the invention that an SiO2 cover layer should be provided which acts as a diffuse reflector and consists of at least partly opaque quartz glass. The method of the invention for producing such a component is characterized in that a slip which contains amorphous SiO2 particles is produced and applied to the surface of the base body with formation of a slip layer, the slip layer is dried and then vitrified with formation of an SiO2 cover layer.