Patent ID: 7388485

Claim:
An anti-theft device comprising: a sensing device for attaching to an entrance of a house building and for sensing whether the entrance of the house building is pried by an unauthorized person or not, a receptacle for attaching to the house building and for disposing close to the entrance of the house building, said receptacle including an opening formed therein, a rotatable shaft, at least one nozzle supported on said shaft and rotated in concert with said shaft, at least one container disposed close to the entrance of the house building for receiving an attacking agent therein, and said at least one container being supported in said receptacle, a tube disposed in said at least one container and including a plurality of orifices formed therein for supplying an air into said at least one container to agitate the attacking agent, a first pumping device for pumping the attacking agent out of said at least one container to counterattack the unauthorized person when the unauthorized person breaking the entrance of the house building, said at least one nozzle being aligned with said opening of said receptacle and being coupled to said first pumping device for allowing the attacking agent to flow out of said at least one nozzle and to be sprayed out through said opening of said receptacle, and a motor coupled to said shaft for rotating said at least one nozzle and said shaft.