Abstract: Embodiments relate to a test method for testing an unpopulated printed circuit board. The method can involve the steps of: exposing the unpopulated printed circuit board to temperatures of a reflow soldering process in a first step; and testing the electrical connections of the unpopulated printed circuit board. Embodiments also relate to a test device and a method for producing populated printed circuit boards.

Abstract: The present invention relates to a test method for an unpopulated printed circuit board, comprising the steps of: exposing the unpopulated printed circuit board to temperatures of a reflow soldering process in a first step; and testing the electrical connections of the unpopulated printed circuit board. The present invention further relates to a test device and a method for producing populated printed circuit boards.

Abstract: An electrically drivable valve for controlling volumetric flows in a heating and/or cooling system of a motor vehicle, including a housing, from which at least two channels, preferable an inlet channel and an outlet channel, branch off, wherein a disk-shaped valve body is arranged in the housing, which valve body can be rotated about an axis of a drive shaft and has a control contour. For a valve that is simple to produce in regard to the design of the valve, the single control contour of the valve body controls a bypass circuit and a cooler circuit of the heating and/or cooling system.

Abstract: An electrically actuated valve may include a housing and a cylindrical valve body mounted rotatably therein. The housing may have at least one casing-side inlet and at least one casing-side outlet. The valve body may have at least one casing-side opening, via which the inlet may be at least one of connectable to the outlet and able to be shut off from the outlet dependent on a rotary angle. A recess extending at least partially around at least one of the inlet and the outlet may be provided on an inner casing face of the housing. At least one sealing element may be provided with a base made from a first material, and a saddle-shaped sealing sliding body made from a second material joined to the first. The sealing element may engage with the base into the recess, and may slide with the sealing sliding body on the valve body.

Abstract: A thermostat having a hollow body, wherein the hollow body is at least partly filled with a thermosensitive medium. A heating element is provided for heating the thermosensitive medium. The heating element is located outside of the hollow body and is at least partially insulated electrically from the hollow body. The element is connected to the hollow body in a thermally conductive manner.

Abstract: An electrically actuated valve may include a housing and a cylindrical valve body mounted rotatably therein. The housing may have at least one casing-side inlet and at least one casing-side outlet. The valve body may have at least one casing-side opening, via which the inlet may be at least one of connectable to the outlet and able to be shut off from the outlet dependent on a rotary angle. A recess extending at least partially around at least one of the inlet and the outlet may be provided on an inner casing face of the housing. At least one sealing element may be provided with a base made from a first material, and a saddle-shaped sealing sliding body made from a second material joined to the first. The sealing element may engage with the base into the recess, and may slide with the sealing sliding body on the valve body.

Abstract: A supercharged internal combustion engine may include an exhaust gas turbocharger which is integrated into an exhaust section on the turbine side and into an intake section on the compressor side. An exhaust gas recirculation line may connect the exhaust section and the intake section. The exhaust gas recirculation line may branch off from the exhaust section downstream of a turbine of the exhaust gas turbocharger and opens into the intake section upstream of a compressor. A valve device for performing at least one of open-loop and closed-loop control of an exhaust gas recirculation rate may be arranged in the region of the exhaust gas recirculation line.

Abstract: An electrically drivable valve for controlling volumetric flows in a heating and/or cooling system of a motor vehicle, including a housing, from which at least two channels, preferable an inlet channel and an outlet channel, branch off, wherein a disk-shaped valve body is arranged in the housing, which valve body can be rotated about an axis of a drive shaft and has a control contour. For a valve that is simple to produce in regard to the design of the valve, the single control contour of the valve body controls a bypass circuit and a cooler circuit of the heating and/or cooling system.

Abstract: A thermostat having a hollow body, wherein the hollow body is at least partly filled with a thermosensitive medium. A heating element is provided for heating the thermosensitive medium. The heating element is located outside of the hollow body and is at least partially insulated electrically from the hollow body. The element is connected to the hollow body in a thermally conductive manner.

Abstract: An electrically drivable valve for regulating volume flows in a heating and/or cooling system of a motor vehicle with a housing, on which at least two connecting pieces are formed, whereby depending on the arrangement of the valve in a heating and/or cooling circuit one or more connecting pieces are formed as inflow connections and a connecting piece as an outflow connection or one or more connecting pieces as outflow connections and a connecting piece as an inflow connection, whereby a valve body rotatable around a rotation axis is arranged in the housing. In the case of an electrically controllable valve, in which pressure losses in the control circuit are reliably reduced, in the case of an axial inflow or outflow of the valve by a heating medium and/or coolant the axes of one or more outflow connections or of one or more inflow connections are oriented axially and radially relative to the rotation axis of the valve body.

Abstract: A supercharged internal combustion engine may include an exhaust gas turbocharger which is integrated into an exhaust section on the turbine side and into an intake section on the compressor side. An exhaust gas recirculation line may connect the exhaust section and the intake section. The exhaust gas recirculation line may branch off from the exhaust section downstream of a turbine of the exhaust gas turbocharger and opens into the intake section upstream of a compressor. A valve device for performing at least one of open-loop and closed-loop control of an exhaust gas recirculation rate may be arranged in the region of the exhaust gas recirculation line.

Abstract: The invention relates to a device for controlling an exhaust gas stream. Said device comprises a housing (1, 101) with at least a first, second and third connection (2, 3, 4, 102, 103, 104) that form links to a first, second and third exhaust gas conduit for conducting the exhaust gases of an internal combustion engine, a first sliding element (6, 106) with a displaceable first sliding rod (6a, 106a) and a first sealing member (6c, 106c) that is located on said rod, a second sliding element (7, 107) with a displaceable second sliding rod (7, 107a) and a second sealing member (7c, 107c) that is located on said rod and an actuator for a force-assisted actuation of the device. According to the invention, a link (4c, 104b) can be established between the first and the second connection and can be adjusted by means of the first sealing member (6, 106) and a link (3c, 103b) can be established and adjusted between the first and the third connection by means of the second sealing member (7c, 107c).

Abstract: The invention relates to a device for controlling an exhaust gas stream. Said device comprises a housing (1, 101) with at least a first, second and third connection (2, 3, 4, 102, 103, 104) that form links to a first, second and third exhaust gas conduit for conducting the exhaust gases of an internal combustion engine, a first sliding element (6, 106) with a displaceable first sliding rod (6a, 106a) and a first sealing member (6c, 106c) that is located on said rod, a second sliding element (7, 107) with a displaceable second sliding rod (7, 107a) and a second sealing member (7c, 107c) that is located on said rod and an actuator for a force-assisted actuation of the device. According to the invention, a link (4c, 104b) can be established between the first and the second connection and can be adjusted by means of the first sealing member (6, 106) and a link (3c, 103b) can be established and adjusted between the first and the third connection by means of the second sealing member (7c, 107c).

Abstract: In a device for transoesophagal echocardiography, an ultrasound transformer (1) is used to make a sequence of layer images for a plurality of parallel sectional planes with the aid of an ultrasonic diagnostic device (8). The layer images made during one cardiac cycle with the image repetition rate of the ultrasonic diagnostic device (8) are stored in a buffer store (34) and transferred to a main store (48) with the aid of a selection stage (49) to generate three-dimensional sets of images only when a locating device (13), and ECG device (24) and a respiration detector (54) generate release signals which are allocated to a constant spatial probe position, a constant R--R interval distance and a constant respiratory state. The content of the main store (48) is evaluated with the aid of an image processing system (56), whereby sectional images may be calculated, especially for any sectional plane, and displayed on a monitor (31).

Abstract: An ultrasonic endoscope device for scanning a patient's organ is constructed using a mobile ultrasonic transducer probe on a carriage housed in a distal and section of the device, within a guide channel formed by a plurality of axially aligned rigid guide links having hollow spaces opened to one side and pivotable by means of a tension wire running through the links. A flexible hose in conjunction with a balloon envelope surround the end section and serves as a water supply path. The device is especially useful for transeophaged echocardiographic scanning.

Abstract: The feed water for a reverse osmosis device (7) is treated, by means of ozone, by being passed through a mixing vessel (4), in which the charging with ozone is carried out, a direct contact time container (5), and a residual-ozone destruction vessel (6) into the reverse osmosis device (7). At the permeate outlet (9) of the latter, part of the stream is branched off and fed, for charging with ozone, into an electrolysis cell (2) which is provided with a solid electrolyte, and fed back into the mixing vessel (4).

Abstract: A liquid crystal cell with two flat glass plates aligned parallel to one another and at a distance from one another, a web of low-melting glass solder provided between the glass plates, a liquid crystal substance provided in the inner space formed by the glass plates and the glass solder web and with electrodes applied on the surfaces of the glass plates facing one another, the connections of which are brought out of the inner space via the glass solder web, wherein the glass solder web and/or the electrodes contain an at least partly reduced oxidizing agent which is formed by the reduction of an oxidizing agent during the glass soldering of the liquid crystal cell.

Abstract: A ceramic electrical material with high nonlinear resistance has a base of zinc oxide and at least one other component. A method is provided for producing such a material.

Abstract: A permanent magnetic material has the composition (MM.sub.1-x ND.sub.x) .sub.1-y Sm.sub.y Co.sub.5, in which 0.25 < x < 1,0 .ltoreq. y .ltoreq. 0.25, and MM is a misch metal of the composition Ce.sub..alpha. La.sub..beta. Pr.sub..gamma. wherein the parameters .alpha., .beta., .gamma., satisfy the conditions0.50 < .alpha. < 0.700.22 < .beta. < 0.450.00 < .gamma. < 0.06, and.alpha. + .beta. + .gamma. = 1.