摘要:
A housing for protectively enclosing a printed circuit board, including a base, and a pair of parallel spaced vertical housing side walls extending upwardly from the base to define a chamber that receives the central portion of the printed circuit board, whereby the vertical edge portions of the board extend outwardly beyond the corresponding vertical edges of the housing side walls, respectively. Vertical side members having generally U-shaped horizontal cross-sectional configurations are mounted on the outwardly extending edge portions of the printed circuit board, respectively, with the leg portions of each side member extending between the housing side walls and the printed circuit board, respectively, whereby portions of housing side walls overlap the side member leg portions. The upper end of the chamber is closed by a lid member that is fastened between the upper ends of the side members.
摘要:
The invention relates to a vehicle roof which comprises an opening, a foldable arrangement (3) and a device for accommodating said foldable arrangement (3), the foldable arrangement (3) comprising at least two parallel plastic segments (1). The foldable arrangement (3) can be transferred to a corresponding device (4) while being folded, thereby at least partly releasing the opening, and the foldable arrangement (3) completely closes the opening in the closed position. The segments (1), when in the closed position, are curved due to deformation and are substantially flat and plane-parallel when at least partly releasing the opening.
摘要:
A plug-in coupling for cryogenic lines is described, having at least two pipes (3, 4, 9, 10) fitted one inside the other like a male/female connection while forming an annular gap (16), in which plug-in coupling the pipes (3, 4, 9, 10) are releasably connected to one another by a flange connection (5, 11) located at their “warm” end, the annular gap (16) between the two pipes (4, 9) is sealed at the “cold” end by an annular seal (7) and at the “warm” end by an annular seal (5d) located in the region of the flange connection (5, 11), and the annular gap (16) is connected to a safety valve (13) in the region of the flange connection (5, 11).
摘要:
A parking brake for a commercial vehicle equipped with an air-operated service brake is configured in such a way that the actuating energy for the brake is reduced in comparison to a configuration with a spring brake cylinder, while the installation space in the wheel area is minimized. Primary functional parts of the parking brake include an inner race and an outer race, which delimit an annular gap. Displaceable tapered-roller bearings are located in the annular gap. To adopt a release position in opposition to the action of a compression spring, the tapered roller bearings are disengaged from the conical surfaces of the inner race and the outer race.
摘要:
A flexible conduit for conveying cryogenic fluids has a metal inner tube and a metal outer tube. A strip-shaped spacer member is made of a material of low thermal conductivity, which is spirally wound on the inner tube such that it contacts both the inner and outer tubes. The strip-shaped spacer member is twisted about its own axis and includes a metal that is stable with respect to high-energy radiation and has a thermal conductivity of less than 25 W/m.K and a tensile strength of more than 240 MPa.
摘要:
A coupling arrangement has a coupling body and a helically shaped undulated metal pipe which has an end face extending along a screw thread of its undulation. A metal holding ring is mounted on the connecting part resting against the latter, where the outer diameter of the holding ring corresponds approximately to the outer diameter of the pipe, where the end face of the holding ring facing the pipe extends along a screw thread corresponding to the screw thread of the pipe, and where the holding ring is connected in the mounted position, fixedly to the connecting part by resting fixedly and tightly against the end face of the pipe.
摘要:
A torsional vibration damper comprises a housing with a fluid-tight ring-shaped chamber and a vibration ring, which is rotatably supported in the ring-shaped chamber of the housing. Between the vibration ring and the housing, a gap-shaped oil receiving space is formed, which is filled with a viscous damping fluid The oil receiving space has an oil outflow and an oil inflow. The oil drain communicates with a section of the oil receiving space located radially further outside than the oil inflow. The replacement of the damping fluid present in the oil receiving space is thus controlled. This makes it possible to refresh the damping fluid over an operation interval, so that the defined damping properties are maintained during the entire operation period. This helps to increase the life of a torsional rotary damper that is autonomous with reference to the oil supply, or to lengthen maintenance intervals.
摘要:
A housing for protectively enclosing a printed circuit board, including a base, and a pair of parallel spaced vertical housing side walls extending upwardly from the base to define a chamber that receives the central portion of the printed circuit board, whereby the vertical edge portions of the board extend outwardly beyond the corresponding vertical edges of the housing side walls, respectively. Vertical side members having generally U-shaped horizontal cross-sectional configurations are mounted on the outwardly extending edge portions of the printed circuit board, respectively, with the leg portions of each side member extending between the housing side walls and the printed circuit board, respectively, whereby portions of housing side walls overlap the side member leg portions. The upper end of the chamber is closed by a lid member that is fastened between the upper ends of the side members.
摘要:
A system can include a column-oriented database including data associated with multiple products and multiple properties. Each property can be associated with at least one product from the multiple products. The data can be defined in a data table that is stored in a main memory of the system, and each property can be defined in a separate column of the data table. A query engine can be configured to receive a query for a product that includes at least one property associated with the product. The query engine can locate at least one product in the database based on a comparison of the query and a search of only the relevant columns in the data table associated with the at least one property and a central processing unit cache can receive data associated with the relevant columns in the data table associated with the at least one property.
摘要:
A mounting rail bus system for supplying power voltage and data signals to a plurality of modules, including a plurality of longitudinally-arranged bus devices mounting the modules in parallel spaced transverse relation on a mounting rail, each of the bus devices including a printed circuit board having parallel strip conductors for transmitting data signals, and a pair of power contact pins for transmitting a power voltage, characterized by the provision of a plurality of generally L-shaped double bushing contact elements have module bush segments for respectively connecting the strip conductors and the contact pins of the bus device with the associated module, and orthogonally arranged partner bush segments for connecting together the strip conductors and pin contacts of adjacent bus devices, respectively, whereby power voltage and data signals are transmitted from the bus device both to the associated module and to the adjacent partner bus device.