Patent ID: 6702251
Filing Date: 2004-03-09
Classification: F04B

Abstract:
A control valve for operating fluid flow that goes through the control valve, the control valve comprising;a retainer cylinder including a first cylindrical member made of non-magnetic material and a second cylindrical member made of magnetic material, the second cylindrical member having a bottom portion; a stationary core disposed in the retainer cylinder; a movable core disposed in the retainer cylinder, wherein the movable core is located between the stationary core and the bottom portion of the second cylindrical member; a shim made of non-magnetic material, the shim is disposed in the retainer cylinder and located between the movable core and the bottom portion of the second cylindrical member, a coil disposed around the retainer cylinder; and a valve body movably linked with the movable core, wherein the valve body adjusts a degree of a valve opening based on a movement of the movable core in the retainer cylinder, and wherein the movement of the movable core is based on an electromagnetic force that is generated between the stationary core and the movable core in accordance with an electric current supplied to the coil.