Patent ID: 6382592
Filing Date: 2002-05-07
Classification: F16K

Abstract:
A valve having a valve body, a valve sheet formed in the valve body, the valve body coming into contact with the valve sheet along an axial direction, to thereby open and close the valve sheet by the operation of a knurled portion and a screwing action, a handle combined with a handle combination unit formed in the upper portion of the valve body, so that a valve rod can ascend and descend therein, the valve comprising:a plurality of ribs protruding outwardly from an outer circumferential surface of the valve rod; a plurality of grooves formed in the outer circumferential surface of the valve rod, to space the plurality of ribs by a predetermined interval; first and second O-rings disposed in the plurality of grooves; an oil storage chamber formed between the first and second O-rings; screw threads formed on the valve rod, having an angular slope such that the valve is opened and closed by a 90Â° rotation of the valve rod; and, a stem which contacts the valve sheet, a shape of an end portion of the stem being conical, wherein the valve sheet is shaped to receive the conical end portion of the stem.