Abstract: The present invention relates to a pipe connector for a sectional display stand, and the pipe connector includes: a first coupler having two to four insertion bars adapted to be inserted into pipes at one ends thereof and a central body adapted to connect the other ends of the insertion bars as a unitary piece thereto; a second coupler having two to four insertion bars adapted to be inserted into pipes at one ends thereof and a central body adapted to connect the other ends of the insertion bars as a unitary piece thereto; a screw through-hole formed on the central body of the first coupler; and an adjusting screw adapted to be mounted at the screw through-hole in such a manner as to be oriented toward the second coupler.

Abstract: The present invention relates to a punched electrode and a rechargeable lithium battery using the same, and more particularly to a punched electrode and a rechargeable lithium battery using the same that can improve cycle life, capacity, and safety characteristics of the battery. The present invention can improve cycle life, capacity, and rate characteristics etc. of the battery by making the impregnation rate of an electrolyte higher and by uniformly controlling the impregnation degree, and it can improve safety properties of the battery by preventing lithium deposition such that a uniform electrode reaction occurs, through punching out a hole in an anode, an anode/cathode, or an anode/cathode/separator of an electrode group that comprises the inner part of the lithium secondary battery.

Abstract: In a battery in which a separator is disposed between a cathode and an anode, a jelly roll is wound with the separator. The cathode, the anode and the separator are received in a battery case and surrounded with an electrolyte, and an opening of the battery case is sealed by a top cap assembly connected to the cathode. A curved groove is formed on the battery case as a safety element for preventing the explosion of the battery due to an increase of internal pressure, the groove being formed along a line of equal stress on the surface of the battery case.

Abstract: The present invention relates to a punched electrode and a rechargeable lithium battery using the same, and more particularly to a punched electrode and a rechargeable lithium battery using the same that can improve cycle life, capacity, and safety characteristics of the battery. The present invention can improve cycle life, capacity, and rate characteristics etc. of the battery by making the impregnation rate of an electrolyte higher and by uniformly controlling the impregnation degree, and it can improve safety properties of the battery by preventing lithium deposition such that a uniform electrode reaction occurs, through punching out a hole in an anode, an anode/cathode, or an anode/cathode/separator of an electrode group that comprises the inner part of the lithium secondary battery.

Abstract: A safety plate of a secondary battery is disclosed, which can prevent the explosion of the battery such as a lithium ion secondary battery which is apt to be exploded due to an excessive inner pressure.

Abstract: A rodless cylinder actuator for moving a slide table in machine tools is disclosed. In the actuator, two pneumatic or hydraulic cylinders are parallely arranged to be directed in opposite directions. At least one pulley is rotatably mounted to the outside end of the piston rod of each cylinder using a bracket. A wire is fixed to the cover of a cylinder housing at both ends thereof and passes over the pulleys of the two piston rods. The slide table is mounted to the middle portion of the wire, thus being linearly and longitudinally reciprocable on the top surface of the cylinder housing in accordance with a movement of the piston rods relative to the two cylinders. A connection rod extends between the brackets of the two piston rods, thus maintaining a desired interval between the two brackets. The rodless cylinder actuator of this invention has a simple construction capable of reducing the production cost of such actuators.