Patent ID: 8387654
Filing Date: 2013-03-05
Classification: G05D,Y10T

Abstract:
1. An automatic pressure reducing valve, comprising: a body having a hollow portion, an inlet portion and an outlet portion, the inlet and the outlet portions are respectively disposed on opposing ends of the hollow portion and are in fluid communication each to the other, and fluid in the inlet portion flows into the hollow portion and flows out of the outlet portion with reduced pressure; a cylinder including a first portion having at least one opening defining a hole for allowing passage of the fluid in the inlet portion of the body into the hollow portion of the body and a second portion having an inside diameter larger than an inside diameter of the first portion, and the cylinder having a T shaped profile with openly communicated ends of the first and the second portions, wherein a lower end of the first portion is connected to an under wall of the hollow portion of the body or an upper side of the inlet portion of the body, an upper end of the second portion is displaced from the outlet portion of the body and each outer side of the first and the second portion is displaced from a wall of the hollow portion of the body; a piston having a T-shaped profile with opposing top end and lower end, the piston slidingly disposed within an inner space of the cylinder, the piston being displaceable responsive to pressure differential between the inlet portion and the outlet portion, whereby fluid from the inlet portion flows through the opening into the hollow portion and out of the outlet portion when the piston is displaced responsive to said pressure differential created by a first pressure acting on said first end and a second pressure acting on said top end, said piston having a third portion with an outside diameter smaller than the inside diameter of the first portion of the cylinder and a fourth portion with an outside diameter smaller than the inside diameter of the second portion of the cylinder.