Patent ID: 8807453

Claim:
A rotary spray nozzle, comprising: a barrel comprising an opposing first connection end and second connection end, and an inner thread on an inner perimeter of said first connection end; a coupling tube set comprising a coupling tube, said coupling tube comprising an opposing first mating end and second mating end, an inner thread on an inner perimeter of said second mating end and a flow passage in communication between said first mating end and said second mating end, and at least one axle bearing mounted around said coupling tube and fastened to said barrel to support said coupling tube in said barrel and for allowing rotation of said coupling tube in said barrel; a pressure tube comprising an opposing gas inlet end and gas outlet end, a gas intake passage in communication between said gas inlet end and said gas outlet end and an outer thread on an outer perimeter of said gas outlet end, the outer thread of said pressure tube being threaded into the inner thread of said barrel, said gas intake passage gradually reducing in direction from said gas inlet end toward said gas outlet end, said gas outlet end being connected to said first connection end of said barrel to keep said gas intake passage in communication with said flow passage of said coupling tube; and a bent nozzle tube comprising a connector, said connector comprising an outer thread threaded into the inner thread of said coupling tube, a nozzle head obliquely extended from said connector and a spiral flow passage defined in said nozzle head in communication with the flow passage of said coupling tube.