Patent ID: 6299133
Filing Date: 2001-10-09
Classification: F16K

Abstract:
A gate valve comprising:a driving mechanism;a valve rod for making displacement in accordance with a driving action of said driving mechanism;a guide shaft for guiding said valve rod;a valve disk for opening/closing a passage formed through a valve box in accordance with a displacement action of said valve rod; anda displacement mechanism provided with a block member connected to said guide shaft, for displacing said valve disk in a direction substantially perpendicular to an axis of said valve rod, wherein:said displacement mechanism includes a rack member connected to said valve rod, for making displacement integrally with said valve rod; a pinion rotatably supported by said block member, for meshing with said rack member; and a pillow member connected to said valve disk and formed with a male thread to be engaged with a female thread formed on an inner circumferential surface of said pinion.