Patent ID: 6105886
Filing Date: 2000-08-22
Classification: B05B

Abstract:
A spray gun for spraying coating material, which comprises:a housing including a body;a spindle mounted for rotation within the body, the spindle having a rotating tubular passageway therethrough for the flow of coating material, the passageway rotating with the spindle, the passageway having first and second ends;a nonrotating flow tube through which the coating material powder flows into the rotating tubular passageway, one end of the flow tube extending partially into the first end of the passageway and spaced within the passageway from the second end, a gap being formed between the nonrotating flow tube and the rotatable spindle, the gap communicating with a supply of pressurized air whereby pressurized air escapes through the gap to provide a rotary seal between the tube and the spindle;a flexible sealing member mounted on one of the spindle and the flow tube and capable of engaging the other of the spindle and the flow tube to seal the gap to prevent material in the passageway from entering the gap, the sealing member urged away from engagement by the pressurized air;a distributor communicating with the passageway and attached for rotation with the spindle, coating material flowing from the passageway into the distributor to be sprayed from the gun; anda drive mechanism located within the body and connected to rotate the spindle and the distributor.