Screw feeder with multiple concentric flights

Details Screw feeder with multiple concentric flights Screw feeder with multiple concentric flights

1994-08-24

1996-06-11

Huson, Gregory L.

Dispensing

Agitator followed by discharge assistant and/or...

All rotary

222413, 198662, 198669, G01F 1120

Patent

active

055247962

ABSTRACT:
A compound screw feeder for uniform volumetric flow rates of particulate solids, suitable for low, nonpulsating feed rates, comprises coaxial inner and outer screw flights. The flights both extend throughout the feeder section and produce a net discharge flow rate dependent on their respective feed directions and rates of feed. Various forms of the feeder may be employed in a loss of weight screw feeder system.

REFERENCES:
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patent: 4872546 (1989-10-01), Hindermann
"How to test your gravimetric feeder's performance," Powder and Bulk Engineering, Dec. 1993 (5 pp.).
"Metalfab Volumetric Feeder Model DB1, Winner of 1978 John C. Vaaler Award," brochure (3 pp.).
"PF-18 Loss of Weight Powder Feeder," Thayer Scale-Hyer Industries, Inc. brochure (4 pp.) Jan. 1993.

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