Patent ID: 6471184
Filing Date: 2002-10-29
Classification: F16K

Abstract:
A valve system comprisinga pipe-receiving body having a fluid inlet for receiving a fluid under pressure, a fluid outlet, a passage between said inlet and said outlet and an annular valve seat within said passage; a valve body disposed on a fluid outlet side of said valve seat, said valve body being movable between a closed position seated on said valve seat to close off a flow of fluid from said fluid inlet through said valve seat to said fluid outlet under the pressure of the fluid in said fluid inlet and an open position spaced from said valve seat to allow a flow of fluid from said fluid inlet through said valve seat and past said valve body to said fluid outlet; a spring disposed in said body in abutment with said pipe-receiving body for biasing said valve body under a predetermined spring force into said closed position on said valve seat against the pressure of the fluid in said fluid inlet; and a motor driven actuator connected to said valve body for moving said valve body between said open position and said closed position under a predetermined actuating force, said predetermined force of said actuator being greater than said predetermined spring force whereby said actuator compresses said spring upon moving said valve body from said closed position to said open position and whereby said actuator and said spring move said valve body from said open position to said closed position under the additive force of said predetermined spring force and said predetermined force of said actuator and against the pressure of the fluid in said fluid inlet.