Patent ID: 7866336

Claim:
A mechanical emergency liquid shut-off device which comprises: a) a liquid sensing unit placed upon a floor of a room; b) a pair of pulley assemblies mounted in a spaced apart relationship to a ceiling of the room; c) a liquid flow pipe having a shut-off valve located within the ceiling of the room; d) a spool having a shaft rotatably connected to said shut-off valve in said liquid flow pipe; e) a first cable having a first end coupled to said liquid sensing unit, wherein said first cable extends through said pulley assemblies; f) a second cable having a first end wound upon said spool, wherein said second cable extends through said pulley assemblies; and g) a ballast weight having a second end of said first cable and a second end of said second cable affixed thereto, wherein when said liquid sensing unit detects liquid coming into the room from a leak in said liquid flow pipe, it will allow said first cable to move about said pulley assemblies making said ballast weight drop down and pull said second cable causing said first end of said second cable on said spool to unwind rotating said spool and said shaft, thereby closing said shut-off valve and stop the liquid leak in said liquid flow pipe.