Gyrating nozzle spray gun

A gyrating nozzle spray gun, comprising:

• a grip comprising an air inlet connectable to an external high-pressure air source for the intake of a compressed air, a valve seat, a gas-delivery tube connected to a front side of said valve seat, a trigger operable to open said valve seat for letting said compressed air flow into said gas-delivery tube, said gas-delivery tube comprising a gas-delivery hole in communication with said valve seat and said air inlet and a mating connection portion located at a distal end thereof around one end of said gas-delivery hole;
• and
• a gyrating pattern generator, said gyrating pattern generator comprising a gas-supply tube connected to said mating connection portion of said gas-delivery tube, said gas-supply tube comprising a connecting portion located at one end thereof remote from said gas-delivery tube and a gas-supply hole axially extending through two opposite ends thereof in communication with said gas-delivery hole, and a coupling socket, a bearing and a gyrating nozzle mounted at said connecting portion of said gas-supply tube, said coupling socket being mounted around said bearing and drivable by said gyrating nozzle to rotate relative to said bearing, said gyrating nozzle being mounted around said coupling socket, said gyrating nozzle comprising a gas accumulation chamber disposed in communication with said gas-supply hole of said gas-supply tube and an oblique jet hole obliquely forwardly extended from said accumulation chamber to the outside of said gyrating nozzle at an eccentric location.