Patent ID: 6564877
Filing Date: 2003-05-20
Classification: A62C

Abstract:
In combination with a fire engine having a high pressure water system, a valve in fluid connection with the high pressure water system, said valve comprising:a valve body having an inner cavity for water to flow therethrough; an inlet opening in fluid connection with the inner cavity to permit water flow thereinto; an outlet opening in fluid connection with the inner cavity to permit water flow therefrom; a valve seat assembly positioned in the inner cavity and comprising a first biasing member exerting a force on a valve plunger cooperating with a seal to thereby open the valve approximately at or below a predetermined system pressure to allow water flow through said outlet opening; and an override comprising a manual activator having a second biasing member and a cooperating member positioned to actuate said valve seat assembly to an open position responsive to a force applied to the manual activator, to thereby open the valve when pressure exceeds the predetermined system pressure.