Patent ID: 6321768
Filing Date: 2001-11-27
Classification: F16K,Y10T

Abstract:
A fluid pressure and heat sensitive control valve, comprising:a valve assembly including a valve body having inline inlet and outlet ports forming a fluid passageway adapted to be interposed in a flow line;a valve seat interposed in the passageway;normally open piston valve means including a piston valve for sealing with said valve seat and closing the fluid passageway and having a piston rod slidably projecting outwardly of the valve body;axially collapsible pin means including a collapsible pin having a first end in axial contact with the outwardly projecting portion of said piston rod for normally biasing said valve means toward a fluid passageway open position and releasing said valve means for sealing with said valve seat in response to fluid pressure above a predetermined value,said pin means including a plate supporting a fusible plug having a metal disc in axial contact with the end of said pin opposite said first end whereby,heat melting said plug releases the end of said pin opposite said first end allowing said piston valve to close the passageway.