Fluid sprinkling – spraying – and diffusing – Electrostatic type – With impeller
Patent
1997-07-18
2000-08-22
Weldon, Kevin
Fluid sprinkling, spraying, and diffusing
Electrostatic type
With impeller
239703, 239706, 239105, 239223, 277395, B05B 310, B05B 504
Patent
active
061058866
ABSTRACT:
A powder spray gun includes a rotary distributor which is capable of operating at slower speeds than liquid spray gun to reduce the problem of powder fusing, increases bearing life, reduce wear on moving parts while generating larger fan patterns and optimized charge transfer capabilities. The powder spray gun has a powder flow path which extends through a gun body to a powder outlet. The rotatable powder distributor is located at the powder outlet. A drive mechanism in the form of a motor is located within the housing and connected to the distributor the rotate the distributor. A spindle, which is mounted for rotation within the body, has a passageway therethrough which forms a part of the powder flow path. The distributor communicates with the passageway and is attached for rotation with the spindle. The powder thus enters the passageway in the rotating spindle before it passes into the rotating distributor. A chamber is formed within the body around the spindle, and the chamber is connected to an air supply to pressurize the chamber. A nonrotating flow tube through which powder flows into the passageway in the spindle, with a gap being formed between the nonrotating flow tube and the rotatable spindle. The gap communicates with the chamber whereby pressurized air from the chamber escapes through the gap to provide a rotary seal between the tube and the spindle. A sealing member may be used to prevent back flow of air through the gap.
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Patent Abstracts of Japan, vol. 008, No. 062 (C-215), Mar. 23, 1984 & JP 58 216751A (Tosyiyuki Kadowaki), Dec. 16, 1983. *abstract*.
Bordner Michael
Hollstein Thomas E.
Reagin Darryl
Shutic Jeffrey R.
Nordson Corporation
Weldon Kevin
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