Powder injector

Details Powder injector Powder injector

1993-01-22

1996-04-09

Mitchell, David M.

Conveyors: fluid current

With means to control conveying fluid or movement of load in...

Control of conveying fluid

406 93, 406153, 137110, 137892, B65G 5366

Patent

active

055055664

ABSTRACT:
A powder injector creates a powder-air mixture and feeds the mixture to a powder coating gun. The injector comprises a powder suction conduit, an injector nozzle fitted in the powder suction conduit, a mixing cone with a venturi tube connected thereto, the mixing cone being disposed downstream of the injector nozzle, a conveying air supply conduit including a control valve for feeding conveying air to the injector nozzle, and a metering air supply conduit for feeding metering air to metering air outlet ports opening into the venturi tube. The metering air supply conduit is composed of two parallel branch passageways branching off the conveying air supply conduit and opening into a common supply conduit leading to the metering air outlet ports. One of the two branch passageways has a metering air control valve disposed therein which is actuated by the air pressure prevailing in the conveying air supply conduit.

REFERENCES:
patent: 3901184 (1975-08-01), Payne et al.
patent: 4114810 (1978-09-01), Masuda
patent: 4615649 (1986-10-01), Sharpless
patent: 4759504 (1988-07-01), Woodward
patent: 4775105 (1988-10-01), Rese
patent: 4941778 (1990-07-01), Lehmann
patent: 5271695 (1993-12-01), Bischof et al.

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