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: A device for varying the relative angular position of a camshaft (2) with respect to a crankshaft of an internal combustion engine. The device has a drive element which is driven by the crankshaft via a gearwheel and which is mounted rotatably with respect to the camshaft. Between the drive element and the camshaft, there is at least two hydraulic chambers which can be acted upon with a pressure fluid in order to set a defined relative rotary position between the drive element and the camshaft.

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: 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: Gearwheel cutting machine, which is designed for machining the tooth flanks of gearwheels (1), comprises chucking means (20) for chucking a workpiece (1) to be machined and a gear cutting tool. The gearwheel cutting machine is distinguished in that it comprises a flat, ring-shaped vibration-damping element (21), which is insertable in the area of the chucking means (20) during the chucking of the workpiece (1) to be machined, in order to suppress or damp vibrations.

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: The invention relates to a device for producing a reinforced foam material and for receiving a textile semifinished product in a hook. To this end, the device has a first subunit having a transport device and a second subunit having a receiving device. The transport device is designed to convey the textile semifinished product into the receiving device, and the first subunit and the second subunit are designed such that the textile semifinished product can be presented in defined length by a relative movement of the first subunit relative to the second subunit. Furthermore, the receiving device of the second subunit is set up such that the textile semifinished product can be placed in the hooks by a relative movement of the receiving device relative to the hook.

Abstract: The invention relates to a vibration generator comprising a working piston and to a construction apparatus having a vibration generator, wherein the vibration generator is operated by a pressure fluid and comprises a control device having a control piston, which is supported in a displaceable manner inside the working piston.

Abstract: Provided is a sandwich component with a core which comprises a foam material. 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: 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: The present invention relates to a method for producing a core structure. Firstly, a first core structure and a second core structure are fastened. The first core structure and the second core structure are positioned at a defined distance. A reinforcement element is introduced into a cavity between the first core structure layer and the second core structure layer. The reinforcement element, the first core structure layer, and the second core structure layer form a self-supporting core structure.

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: A composite armor element for protection against projectiles. At least one layer of effective bodies is disposed in rows next to one another in the composite armor element, the effective bodies being embedded in a matrix material. The effective bodies of one row are fixedly interconnected at least partially by means of webs to form a chain which is a monolithic element. An effective body element for insertion in a composite armor element comprises at least two effective bodies fixedly interconnected by at least one web to form a chain. The effective body element is a monolithic element, and a plurality of effective body elements are embedded in a matrix material.

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: A camshaft adjuster (1) for an internal combustion engine of a motor vehicle with a radially outer stator (4) that can be driven by the crankshaft, a radially inner rotor (5) connected locked in rotation with the camshaft (2), working chambers (6) that are arranged between the rotor (5) and the stator (4) and that can be pressurized with a pressure such that the relative rotational position of the rotor (5) to the stator (4) is adjustable, at least one seal cover (7) bordering the working chambers (6) on the sides and contacting the rotor (5) and the stator (4) in a sealing way, with an annular disk-shaped base body (13) and an annular projection (9) encompassing the camshaft (2) and adjacent to the radial inside of the base body (13). The base body (13) contacts, with a seal surface (D), the rotor (5) and transitions via a radius (10) into the annular projection (9).

Abstract: The invention pertains to a method for reinforcing cellular materials (1), a reinforced sandwich construction (5) as well as a correspondingly equipped aircraft. In the method, a cellular material (1) is provided with fiber bundles (3) that are introduced into the cellular material (1) with a needle (8). In this case, the needle (8) initially pierces a through-hole (2) into the cellular material (1) from one side in order to subsequently take hold of a fiber bundle (3) situated on the other side with the needle (8) and pull said fiber bundle into the cellular material (1).

Abstract: The present invention provides a method of producing a construction, in particular a sandwich construction for the aeronautical and aerospace fields, comprising the following steps. A heating material is initially applied on one side of a core construction material. In a further step a reinforcing element is introduced into the core construction material and the heating material in such a way that the reinforcing element extends through the core construction material and the heating material and has a portion which projects beyond the heating material. The heating material is then heated to soften the projecting portion at least in regions and said projecting portion is subsequently deformed using the softened region as a pivot point to engage the core construction material from behind and to form the construction. This method is distinguished in particular by the fact that it allows the portions to be heated substantially simultaneously, and not sequentially as in the state of the art.

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.

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 provided for manufacturing a three dimensional frame structure that can be used as a core structure in a sandwich construction. Furthermore, a frame structure is provided for a sandwich construction, which frame structure has been manufactured in accordance with the method. In the method, a two dimensional lattice structure is made from bar-shaped linear semi finished products, in which structure the semi finished products intersect at defined points of intersection; the bar-shaped linear semi finished products are connected at the points of intersection and are softened by locally applying heat to the lattice structure in each case along three non-intersecting (imaginary) straight lines.