Powder pump with internal valve

Details Powder pump with internal valve Powder pump with internal valve

1989-11-29

1991-08-06

Peters, Jr., Joseph F.

Conveyors: fluid current

Intake to fluid current conveyor

Upstream of suction source

417198, B65G 5314

Patent

active

050372475

ABSTRACT:
A powder pumping apparatus including a pump body formed with a pumping chamber having a venturi passageway, a suction tube intersecting the pumping chamber and an air nozzle including a valve mechanism which discharges pressurized air directly into the venturi passageway of the pumping chamber to create a vacuum within the pumping chamber and suction tube to withdraw particulate powder material from a powder feed hopper. The air nozzle is carried within the interior of the pump body and has a discharge outlet located within the pumping chamber which discharges a substantially constant pressure pulse of air directly into the venturi passageway of the pumping chamber. In turn, a sharp, well-defined powder pulse is produced having a substantially homogeneous powder-to-air density throughout the duration of the pulse.

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patent: 4824295 (1989-04-01), Sharpless
patent: 4846617 (1989-07-01), Ehrhardt

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