Patent attributes
A mechanical emergency liquid shut-off device which comprises a liquid sensing unit placed upon a floor of a room. A pair of pulley assemblies are mounted in a spaced apart relationship to a ceiling of the room. A liquid flow pipe having a shut-off valve is located within the ceiling of the room. A spool has a shaft rotatably connected to the shut-off valve in the liquid flow pipe. A first cable has a first end coupled to the liquid sensing unit, wherein the first cable extends through the pulley assemblies. A second cable has a first end wound upon the spool, wherein the second cable extends through the pulley assemblies. A ballast weight has a second end of the first cable and a second end of the second cable affixed thereto. When the liquid sensing unit detects liquid coming into the room from a leak in the liquid flow pipe, it will allow the first cable to move about the pulley assemblies making the ballast weight drop down and pull the second cable causing the first end of the second cable on the spool to unwind rotating the spool and the shaft, thereby closing the shut-off valve and stopping the liquid leak in the liquid flow pipe.
