Patent ID: 6513545
Filing Date: 2003-02-04
Classification: F16K,Y10T

Abstract:
A flow shut off valve for use with a pressurized fluid application, the fluid application including a normally regulated and pressurized fluid supply, a length of a conduit extending from the fluid supply, said valve further comprising:a housing interposed-between the fluid supply and the extending conduit, said housing having an inlet end communicating with an outlet of said fluid supply, said housing further having an outlet end communicating with an inlet of the length of conduit, said housing further including an axially extending interior extending between said inlet end and said outlet end, said axially extending interior defining, at an intermediate location, an annular shoulder separating an enlarged diameter portion of said interior with a narrowed diameter portion; a seating member slidably mounted within said enlarged diameter portion and which is axially translatable over a selected distance defining an open position permitting fluid flow through said interior and a closed position in which said seating member abuts against said annular shoulder, substantially interrupting said fluid flow; a first biasing means comprising a fixed spring exerted against an inlet side of said seating member and a second biasing means comprising an adjustable spring exerted against an outlet side of said seating member, said adjustable spring exerting a force towards said inlet end equalizing a combined force provided by said fixed spring and the normally regulated fluid supply in said open position; an insert sleeve inserted within said outlet end of said housing and threadably engaged within said narrowed diameter portion of said extending interior, said sleeve being adjusted in first and second axial directions to selectively increase and decrease said bias exerted against said outlet side of said seating member; and upon the fluid application switching from a normally regulated condition to an opened and unregulated condition, said combined force acting upon said seating member, overcoming said adjustable spring, and actuating said seating member in a direction only towards said outlet end to said closed position.