Dosing device for pneumatic delivery systems

Details Dosing device for pneumatic delivery systems Dosing device for pneumatic delivery systems

1975-08-04

1976-07-20

Hartary, Joseph W.

Weighing scales

Weigher responsive material control

Feed

141128, 302 3, G01G 1310

Patent

active

039701590

ABSTRACT:
A dosing device for a pneumatic delivery system particularly for powdery granular and similar coarse and fine grain materials comprises a first delivery tube defining a first conduit for the coarse dosing having a coarse dosing discharge. A second delivery tube defining a second conduit for fine dosing has a fine dosing discharge and it communicates with the first delivery tube through an intermediate housing having a screen therein for the passage of the fines from the coarse dosing conduit into the fine dosing conduit. The material is delivered by a pneumatic delivery tube into the coarse dosing conduit and it may operate to discharge the coarse feeding of material into a weighing tank. When the coarse conduit is shut off when the amount of weighted material approaches the desired value a feed screw in the fine conduit delivers an additional amount of material into the weighing receptacle.

REFERENCES:
patent: 801706 (1905-10-01), Beakbane et al.
patent: 952587 (1910-03-01), Sonander
patent: 1546360 (1925-07-01), Bates
patent: 3182738 (1965-05-01), Frazel
patent: 3545281 (1970-12-01), Johnston

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