Patent ID: 6892963

Claim:
A portable convergent miniaturized spray gun including a handle, said spray gun having a central passage for flowing liquid resin and a concentric passage relative to the central passage for flowing pressurized air, and a nozzle internal of said spray gun for discharging the liquid resin from the central passage, a double concentric tube assembly including an inner tube and an outer tube, the inner tube having an additional central passage in axial alignment with said central passage for receiving resin from said internal nozzle, said inner tube and said outer tube defining an additional concentric passage relative to said central passage in axial alignment with said concentric passage, a fluid tip positioned inside said outer tube, said fluid tip having a main body ( 78 ) which is circular in cross section being attached at the end of said inner tube and having a portion thereof being dimensioned so that its diameter is substantially equal to the inner diameter of said outer tube, a plurality of flats formed on said circular cross section to define a gap between fluid tip element ( 70 ) and said outer tube for metering and directing atomized air into said additional concentric passage ( 66 ), said fluid tip having a central bore in communication with said additional central passage defining a central orifice for discharging the resin flowing from said central passage and said additional central passage, an air cap mounted over said fluid tip and defining with said fluid tip an air nozzle for flowing air into said resin stream discharging from said central orifice and defining an atomized convergent spray having a low pressure zone, and a dry powdered nozzle having angled flow passages for directing dry powder into the low pressure zone of said atomized convergent spray.