Abstract: An electric vehicle battery case manufacturing method including a first cycle performing operation of sequentially performing a unit assembly preparing step (S1), a first welding step (S2), a first machining step (S3), and a first inspection step (S4), wherein the step (S1) performs a process of preparing unit parts through aluminum extrusion and machining and then welding each sub-assembly, the step (S2) performs a process of assembling the sub-assemblies produced through the step (S1) and then performing metal inert gas (MIG) welding or friction stir welding (FSW), the step (S3) performs a process of performing machining or hole machining on a welding bead part and a distorted surface of a product assembled through the step (S2), and the step (S4) performs a process of conducting a leak test on the product corrected through the step (S3).

Abstract: A particulate filter connecting structure of an exhaust gas post processing system that engages flanges provided in a particulate filter and catalyst devices adjacent to the particulate filter through a clamp is provided. The particulate filter connecting structure includes a gasket interposed between the flanges and is formed with a bead portion curved convexly into a round shape.

Abstract: An electric vehicle battery case manufacturing method including a first cycle performing operation of sequentially performing a unit assembly preparing step (S1), a first welding step (S2), a first machining step (S3), and a first inspection step (S4), wherein the step (S1) performs a process of preparing unit parts through aluminum extrusion and machining and then welding each sub-assembly, the step (S2) performs a process of assembling the sub-assemblies produced through the step (S1) and then performing metal inert gas (MIG) welding or friction stir welding (FSW), the step (S3) performs a process of performing machining or hole machining on a welding bead part and a distorted surface of a product assembled through the step (S2), and the step (S4) performs a process of conducting a leak test on the product corrected through the step (S3).

Abstract: A multi-band antenna is provided. The multi-band antenna includes a plurality of radiator patterns that are configured to operate according to different frequency bands, a plurality of feeding units that are respectively connected to different contact points of the antenna radiator for connecting feeding units of the plurality of feeding units to at least one radiator pattern included in the plurality of radiator patterns, and a switching unit configured to switch between feeding units of the plurality of feeding units for connecting at least one radiator pattern included in the plurality of radiator patterns to the switched feeding unit.

Abstract: A multi-band antenna is provided. The multi-band antenna includes a plurality of radiator patterns that are configured to operate according to different frequency bands, a plurality of feeding units that are respectively connected to different contact points of the antenna radiator for connecting feeding units of the plurality of feeding units to at least one radiator pattern included in the plurality of radiator patterns, and a switching unit configured to switch between feeding units of the plurality of feeding units for connecting at least one radiator pattern included in the plurality of radiator patterns to the switched feeding unit.

Abstract: A photoresist dispensing device for use in applying a metered amount of photoresist on a wafer comprises, a photoresist storage tank, a nozzle for spraying the photoresist on the wafer, a feeder unit for drawing a metered amount of the photoresist out of the storage tank and discharging it through the nozzle, a pneumatic control unit for controlling the operation of the feeder unit with the use of pressurized air; and a filter disposed in between the storage tank and the feeder unit for removing alien matters present the photoresist.

Abstract: A wire protecting structure for connecting the wire to a insulator mounted onto a pole is directed to facilitate reception of the wire therein and to prevent exposure of the wire therefrom. The wire protecting structure includes a tube having a slit which is longitudinally formed throughout the tube and has substantially a width to facilitate insert of the wire into the tube, and a plurality of protrusions which may be formed at outer surface of the tube; a cover for enforcing the tube to closely contact the wire to the tube, wherein an edge of the cover is integral with outer surface of the tube, other edge of the cover is provided with a plurality of holes which are held to the protrusions of the tube, and a mid-portion of the cover is attached to the top portion of the insulator; and elongated binders wound about the tube and the cover, in a spiral winding configuration, to hold the tube and the cover to the insulator.

Abstract: A variable pedal driving device for a bicycle, the device allowing the bicycle pedals to slide along crankshafts during operation of the device. Each pedal is coupled to a slide pipe slidably mounted on a crankshaft. The slide pipe is in turn connected to an eccentric member mounted on the main shaft of the driving device. When a pedal is driven in a forward direction, the eccentric member causes the pedal to extend out to a maximum distance from the main shaft, for more efficient driving of the bicycle.