Patent ID: 6012490
Filing Date: 2000-01-11
Classification: F15B,Y10T

Abstract:
A pressure controlling valve to change a fluid pressure, being mounted between a change valve changing the direction of a pressure fluid and a base supplying pressure fluid to said change valve, said pressure controlling valve having a valve body with substantially the same width as said change valve and being positioned between said change valve and the base;a plurality of opening and closing communication channels placed in a row in said valve body, which communicate directly with a pair of corresponding ports of said change valve and the base via a pressure controlling valve seat,at least one direct channel which communicates directly with ports formed in said base;a plurality of pressure controlling valve ports mounted in said valve body so as to cross said opening and closing communication channels and said at least one direct communication channel, which communicate with said opening and closing communication channels but do not communicate with said at least one direct communication channel, and which penetrate into said at least one direct communication channel;a pressure controlling valve stem to install said pressure controlling valve ports internally in such a manner as to enable free movement;a pressure controlling valve structural element mounted on said pressure controlling valve stem, which opens and closes said pressure controlling valve seat;a pressure controlling chamber mounted at one end of said pressure controlling valve stem and a pressure controlling piston mounted in said pressure controlling chamber so as to enable free movement thereof and a pressure controlling spring which pushes said pressure controlling piston toward the pressure controlling valve stem side;a resetting chamber mounted at the other end of said pressure controlling valve stem and a resetting spring mounted in said resetting chamber such that said resetting spring pushes the pressure controlling valve stem toward the pressure control piston side;a plurality of lead ports that respectively communicate with said pressure controlling chamber and resetting chamber and from channels to guide the pressure fluid for controlling pressure to each chamber with any of said communication channels, which are formed inside said pressure controlling valve stem, and a lead clearance formed so as to penetrate the lead ports between the outer region of said pressure valve stem and pressure valve ports.