Patent ID: 7516751
Filing Date: 2009-04-14
Classification: E03B,F16K,Y10T

Abstract:
1. A fluid flow prevention apparatus for use with a wet barrel fire hydrant which is in communication with a barrel defining a flow passageway, the fluid flow prevention apparatus comprising: a valve member positioned within the flow passageway such that fluid flowing within the barrel flows substantially uniformly around the valve member and wherein the valve member is moveable from a normally open position to a closed position; a stem member having a first end attached to the valve member and a second end positioned downstream of the valve member; a holding member configured to engage the second end of the stem member such that the valve member is held in an open position and wherein the holding member is substantially stationary relative to the hydrant and wherein the holding member is configured to disengage the second end of the stem member in response to damage to the hydrant.