Patent ID: 8967200
Filing Date: 2015-03-03
Classification: F16K,Y10T

Abstract:
1. A fluid control valve comprising a pair of valve members, on one of which is formed a seating surface and on the other of which is formed a valve seat surface, wherein generally ring-shaped first bottom formed grooves that are in communication with an outside upstream side flow channel through a first valve inner flow channel arranged inside of the valve member and generally ring-shaped second bottom formed grooves that are in communication with an outside downstream side flow channel through a second valve inner flow channel arranged inside of the valve member are alternately arranged on either one of the seating surface and the valve seat surface, in a state that the seating surface and the valve seat surface are in contact with each other, communication between an opening of the first bottom formed groove and an opening of the second bottom formed groove is blocked so as to be in a closed state wherein the upstream side flow channel is not connected to the downstream side flow channel, and in a state that the seating surface is separated from the valve seat surface, the opening of the first bottom formed groove is in communication with the opening of the second bottom formed groove through a gap between the seating surface and the valve seat surface so as to be in an open state wherein the upstream side flow channel is connected to the downstream side flow channel, and a communication bore in communication with the first or second bottom formed groove of the first or second valve inner flow channel is formed at least on a side surface of the first or second bottom formed groove.