Quantitative powder feeder capable of feeding powder by fixed am

Details Quantitative powder feeder capable of feeding powder by fixed am Quantitative powder feeder capable of feeding powder by fixed am

1996-08-08

1998-04-14

Huson, Gregory L.

Dispensing

With cleaning means

222368, G01F 1110

Patent

active

057382492

ABSTRACT:
A rotor 22 accommodated in a casing 26 has a circumferential surface sliding on the internal surface of the casing 26 in airtight condition. The casing 26 is provided with a powder feed part 27 positioned above the rotor and is provided with a powder drop part 30 positioned under the rotor. At least one quantity-measuring recessed part is formed in the slide surface of the rotor. In accordance with the rotation of the rotor, the quantity-measuring recessed part comes to communicate with the powder feed part, so that powder is fed from the powder feed part into the quantity-measuring recessed part. When the rotation is advanced, the quantity-measuring recessed part comes to communicate with the powder drop part, so that the powder drops from the quantity-measuring recessed part through the powder drop part into a high-pressure part 19 arranged thereunder. These members construct a quantitative powder feeder which, even when a pressure difference exists between the supply side and the supplied side, can effectively prevent the gas flow and pressure leak therebetween and can minimize the amount of carrier gas used for feeding powder.

REFERENCES:
patent: 3633797 (1972-01-01), Graff
patent: 3910428 (1975-10-01), Peterson, II
patent: 4906144 (1990-03-01), Matsueda

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