Patent ID: 7124774
Filing Date: 2006-10-24
Classification: F16K,Y10T

Abstract:
1. A control valve for regulating flow of fluids passing through the valve, the control valve comprising: (a) a body having an inlet, an outlet and a passageway through which the fluid passes from said inlet to said outlet; (b) an actuator located in a chamber connected to said body; (c) a displaceable column deployed so as to be displaced along an axis by said actuator over a range of motion from a most retracted position to a most extended position, said displaceable column including a hollow stem; (d) a check valve assembly associated with said displaceable column so as to be slidingly displaceable parallel to said axis relative to said displaceable column, said check valve assembly including a damping piston deployed within said hollow stem so as to limit travel speed of said check valve assembly relative to said displaceable column; and (e) a valve closure associated with said check valve assembly, such that, when said displaceable column is displaced to said most extended position, said displaceable column forces said check valve assembly and said valve closure to a sealing position in which said valve closure blocks the passage of fluid from said inlet to said outlet and, when said displaceable column is displaced towards said most retracted position, said check valve assembly allows displacement of said valve closure between said sealing position and an open position in which said inlet is in fluid communication with said outlet.