Abstract: A circuit for adjusting and for at least partially compensating, respectively, thermal variations is provided, where a current source is connected to a temperature compensation unit, where the temperature compensation unit at least partially compensates thermal variations of the current source, wherein the temperature compensation unit has at least one device having a temperature coefficient, in particular having a negative temperature coefficient. Further a lighting module or a lamp may have such a circuit as well as a method for operating the circuit and/or the lamp and the lighting modules, respectively.

Abstract: The invention relates to a plate element for a plate cooler, comprising an outer border (8a), running at least partly around the plate element and lying substantially in one plane, the outer border (8a) forming an upper termination of a peripheral side wall (8), a base (1), lying in a bottom plane, with a plurality of openings (2, 3) for allowing a medium to pass through, at least one first opening (2, 3), formed as an aperture in the base, and at least one second opening (4, 5), an opening rim (4a, 5a) of the second opening running in a plane which is parallel to the bottom plane and is offset in a vertical direction with respect to the bottom plane.

Abstract: The invention relates to a heat exchanger, especially a stacked plate oil cooler (1) having a plate-type design. The heat exchanger is characterized in that two adjacent heat exchanger plates (2) define a space between them through which the heat exchange medium or a second medium that is to be cooled or heated flows. At one end of said heat exchanger, a base plate (3) lies substantially flat against the adjacent outmost heat exchanger plate (2) of the heat exchanger. Said base plate (3) is provided with a recess (5) whose contour follows that of the heat exchanger plate (2).

Abstract: The invention relates to an external fixator which has a retaining member (1) and connecting elements (2) which can be connected without screws to a bone or bone parts (5), in particular to both halves of an opened sternum, and provide possibilities for increasing or reducing the compressive stress between the two bone parts or sternum halves.

Abstract: The invention relates to a heat exchanger (1) with flow channels (3), which can be flowed through from a common first inlet to a common first outlet by a first fluid, comprising a housing (2), which accommodates the flow channels (3) and which can be flowed through by a second fluid from a second inlet area to a second outlet area. The flow channels (3) have a flat cross-section as well as longitudinal sides (3a) and are flow-connected to one another. The invention provides that the longitudinal sides (3a) of the flow channels (3) are integrally connected to the housing (2), particularly by soldering.

Abstract: A method for inducing differentiation of embryonic stem cells into neuronal precursors is provided as well as an assay for neuronal precursor or progenitor cells and a method for identifying agents that inhibit or reduce an increase in neurite degeneration.

Abstract: An electroluminescent (EL) element is connected to the power supply and is intermittently operated as a lighting device and as a brightness sensor. For this purpose, the processing unit induces the controlled AC voltage source to reduce the voltage for a short period. The current intensity is measured by current measuring devices and the corresponding measuring signal is digitized using the analog/digital converter (A/D). A processing unit uses the signal and the effective voltage to determine, by means of empirical calibration data stored in the memory or by using a calibration function, the brightness, i.e. the luminance of the light that is incident on the EL element. The processing unit associates, using desired values stored in the memory, the detected brightness with an operating voltage level which ensures the desired emission brightness of the EL element when operated as a lighting device.

Abstract: The invention relates to a stacked-disc cooler for a motor vehicle comprising several discs (21-24) stacked on each other and connected together, in particular welded to each other, and a supply channel which passes through several discs and through which a cooling medium is introducible into the staked-disc cooler (1) and distributed on the individual discs. According to said invention, in order to obtain the improved staked-disc cooler (1), a valve device preventing the return of the cooling medium outside of the supplying channel (18) is mounted therein.

Abstract: The invention relates to a plate heat exchanger for a motor vehicle, comprising conducting devices (3, 4) in the form of elongate disks which are stacked on top of each other and soldered together. The disks are composed of two elongate half disks (41) that form a hollow space for conducting a medium therethrough. Each end of each half disk (41) is provided with a first through-hole (48; 49) for feeding or discharging the medium, each through-hole (48; 49) being disposed between two other through-holes (55, 56; 60, 61). In order to create a plate heat exchanger that has a simple design and can be produced at a low cost, an edge region (57, 58; 62, 63) of the other through-holes (55, 56; 60, 61) is embodied in a raised manner and is substantially provided with the shape of a pot encompassing a bottom in which the associated through-hole is recessed.

Abstract: The invention relates to a radiator, in particular for a motor vehicle, comprising at least one coolant conduit device (1), in particular a plurality of coolant conduit devices such as pipes, which is or are traversed by a coolant. The aim of the invention is to create a radiator with a greater degree of efficiency than conventional radiators. To achieve this, the coolant conduit device (1) consists of a one-piece element that comprises two halves (11, 12), which are interconnected by a bending edge (8) that runs in the longitudinal direction of the coolant conduit device (1).

Abstract: The invention relates to a stacked-plate heat exchanger, particularly an in-tank oil cooler, which is mounted in a coolant casing of a coolant cooler for vehicles. The heat exchanger comprises a number of stacked and interconnected, particularly soldered, elongated plates (71-77), each consisting of two plate halves and enclosing a hollow space though which a medium to be cooled, such as oil, passes in a longitudinal direction of the plates. In order to create a stacked-plate heat exchanger that can be economically produced, each of the plate halves have a multitude of grooves extending from one longitudinal side to the opposite longitudinal side of the plate half.

Abstract: A plate heat exchanger comprising a plurality of plates (12,13) which are stacked against each other and which are of a first and second type in order to form flow channels for a first and second medium. The plates form a heat exchanger block (2) with an upper side and a lower side and with two opposite side surfaces (10) and front faces (9). The first flow channels are peripherally sealed for the first medium and are fluidically connected to distributor and collector channels which are arranged in a vertical position with respect to the plate plane and which lead into inlet and outlet connection pieces (6,7) which are respectively arranged on the upper side and/or lower side (3,11). The second flow channels are open at the front surfaces (9) thereof and are sealed at the side surfaces (10) thereof. The open sides (9) form an inlet and outlet plane for the second medium.

Abstract: The aim of the invention is to provide a heat exchanger, in particular a stacked-plate cooler for a vehicle, which increases the heat transfer, thus maximising the utilisation of the heat transfer surface. To achieve this, the inventive heat exchanger (1) is equipped with several tray-shaped plates (2a to 2z). Said plates (2a to 2z) are placed on top of one another, are sealed together on their peripheral edge and are provided with passages (4). The passages (4) lying essentially above one another form a continuous flow channel (6a to 6d) that traverses the plates (2a to 2z) and adjacent flow channels (6a to 6d) are traversed by different media (M1, M2) from an inflow side to an outflow side, the respective flow channel (6a to 6d) having an elongated cross-section (QS).

Abstract: The invention relates to a heat exchanger which is especially used as an oil cooler in vehicles, and a method for the production thereof. A heat exchanger which is especially used as an oil cooler in the motor vehicle industry consists of interconnected plates. Outwardly closed cavities are embodied between the plates. Said cavities are alternately supplied with a first or second medium by means of respectively at least one supply line and one discharge line, and a corresponding medium flows through them. The plates are profiled in such a way that contact points are created between the respective profiles of the plate, and said plates are interconnected in the region of said contact points. The plates are designed such that the current from the first or second medium forming between the plates, from the corresponding supply line to the corresponding discharge line, does not follow a linear path.

Abstract: The invention relates to a stacked plate heat exchanger (1), in particular, an oil cooler for motor vehicles, made up into an assembly from alternating dished plates and baffle sheets (3), stacked one on top of and inside the other, each comprising first and second through openings (7, 8), for the formation of distribution and collector channels, which are welded together to form said first and second flow channels, whereby the baffle sheets (3) form a stay between the stacked plates and the assembly is enclosed by a base plate (4) and a cover plate (5).

Abstract: The invention relates to a heat exchanger (1), especially for motor vehicles, comprising a housing (2) and at least one pipe (3) disposed inside said housing (2). The heat exchanger is characterized in that structures (4) are provided in the area between the pipes (3) and the housing (2) and/or between the pipes (3).

Abstract: The invention relates to a heat exchanger, especially a charge air cooler or exhaust gas cooler for motor vehicles, comprising flow ducts for a gas that is to be cooled and a coolant, said flow ducts being arranged in a housing (3). The flow ducts for the gas are directed through tube bottoms into an inlet diffuser and an outlet diffuser (2) while the coolant is directed through the housing (3) via coolant connections (4a, 4b). The inventive flow ducts for the gas (8) and the coolant (9) are formed by a metal strip that is reshaped in a meandering manner and the housing (3), which are integrally bonded.

Abstract: A bone distractor, preferably an alveolar ridge distractor, having first and second bone plates sized and configured to engage opposing bone segments and an interconnecting mechanism operatively associated with the first and second bone plates such that rotation of an activation screw causes the second bone plate to move with respect to the first bone segment. The distractor may also a housing having a first housing member operatively associated with the first bone plate and a second housing member operatively associated with the second bone plate, the second housing member being pivotally coupled to the first housing member such that the orientation of the second bone plate may be varied with respect to the first bone plate. Moreover, the second housing member may include a releasable closure cap so that the second bone plate may be easily removed and/or replaced, the second bone plate being provided in varying shapes and sizes.

Abstract: A plate heat exchanger comprising a plurality of plates (12,13) which are stacked against each other and which are of a first and second type in order to form flow channels for a first and second medium. The plates form a heat exchanger block (2) with an upper side and a lower side and with two opposite side surfaces (10) and front faces (9). The first flow channels are peripherally sealed for the first medium and are fluidically connected to distributor and collector channels which are arranged in a vertical position with respect to the plate plane and which lead into inlet and outlet connection pieces (6,7) which are respectively arranged on the upper side and/or lower side (3,11). The second flow channels are open at the front surfaces (9) thereof and are sealed at the side surfaces (10) thereof. The open sides (9) form an inlet and outlet plane for the second medium.