Patent ID: 9528621
Filing Date: 2016-12-27
CPC Classification: E06B,F16K,Y10T

Claim Text:
1. An apparatus for shutting off the flow of water through ductwork, the apparatus being installed in an air conditioning duct that is installed in a fixed structure for use in a high floodwater condition that occurs at a time such as during a tsunami, the apparatus comprising: upper and lower hinged door bodies disposed in an inside of the air conditioning duct; a support device configured to normally hold the upper and lower door bodies in an open position which allows air to flow through the air conditioning duct; a chain or a belt configured to interconnect the opening and closing operations of the upper door body with the opening and closing operations of the lower door body; and a water intrusion detection device configured to detect the intrusion of water into the air conditioning duct which releases the support device allowing the upper and lower door bodies to move from an open position to a closed position; wherein the upper and lower door bodies are configured to be horizontally moved in a direction in which pressure of water, attributable to the intrusion of water into the air conditioning duct, is applied when the inside of the air conditioning duct is closed.