| 摘要 |
A ball sliding type LPG gas charging apparatus is provided to move a cylinder with less force by reducing friction between an inner cylinder and an outer cylinder by maintaining a concentric circle when the inner and outer cylinders slide. A ball sliding type LPG(liquefied petroleum gas) charging apparatus comprises: an inner cylinder, an outer cylinder(20) and a concentric circle maintaining unit. The inner cylinder includes at least two through-holes(14) for mounting a ball(13) in a groove formed on an outer circumference surface of a charging nipple, a groove formed in a length direction on the outer circumference surface thereof, and a circular groove on the outer circumference surface of one side thereof. The through holes are tapered so that diameters of them are decreased in the direction of center of axis. The outer cylinder includes a groove formed in a length direction at the location corresponding to the groove formed on the outer circumference surface of the inner cylinder. The concentric circle maintaining unit includes a ball, a front hand grip(60), a rear hand grip(40) and an elastic member(50). The ball is inserted into a space formed by the grooves of the inner and outer cylinders.
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