Patent ID: 6736368
Filing Date: 2004-05-18
Classification: F16K

Abstract:
A gate valve comprising:a valve body capable of opening and closing an opening of a sealed chamber, and capable of sealing the opening by inclination with respect to the opening; a valve rod to one end portion of which the valve body is fixed, held so that it can move in a straight-move direction for the valve body to open and close the opening, and held so that it can incline about an inclination axis; a regulation means for regulating a straight movement in the direction of closing the opening of the valve body at a closed position where the valve body closes the opening; a cam mechanism connected to the other end portion of the valve rod outside the sealed chamber, for moving the valve rod straight by a supplied straight-move force, converting the supplied straight-move force to an inclination force and inclining about the inclination axis the valve rod wherein a straight movement is regulated at the close position toward the direction that the valve body seals the opening; and a drive means for supplying the straight-move force to the cam mechanism, wherein the valve rod is held so that it can move in a straight-move direction of opening and closing the opening via a pair of linear guides provided on both sides of the valve rod.