Patent ID: 7392817

Claim:
A fluid shut-off valve assembly comprising: a valve body having a fluid passageway; a valve stem having a valve plug moveable between a first position and a second position allowing fluid to pass through the passageway when the plug is in the first position, and not allowing fluid to pass through the passageway when the plug is in the second position, the valve plug biased toward the second position; a valve plug catch device having a solenoid plunger adapted to engage a detent in the valve stem to hold the valve plug in the first position; a fluid flow detection device for detecting flow of fluid through the passageway; and an electronic timer electrically connected to the fluid flow detection device for timing duration of fluid flowing through the passageway and causing the solenoid plunger to disengage the detent to release the valve plug, causing the valve plug to move from the first position to the second position once a predetermined time limit has been reached by the timer and thereby plugging the fluid passageway and stopping the flow of fluid through the passageway.