Apparatus for controlled delivery of particulate material

Details Apparatus for controlled delivery of particulate material Apparatus for controlled delivery of particulate material

1993-05-21

1994-02-15

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing liquid or solid sample

422 81, 422100, 7386481, 356 36, 406 93, 406134, G01N 100, G01N 2100, B01L 302, B65G 5304

Patent

active

052864510

ABSTRACT:
An apparatus that provides controlled volumetric delivery of particulate material, particularly for delivery of a particulate sample for analysis. The apparatus includes a sample receiving tubular member that is vibrated or rotated relative to the sample container to agitate and fluidize a surface portion of the sample placed in an elongated container. A transporting gas carries the fluidized sample from the container through the tubular member. Sample delivery rate is controlled by a traversing mechanism that gradually inserts the moving tubular member into the upper fluidized portion of the sample. The apparatus allows total delivery of a known mass of a particulate sample at a predetermined delivery rate.

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patent: 4859121 (1989-08-01), Deysson et al.
patent: 4962044 (1990-10-01), Knesel, Jr. et al.
patent: 5080868 (1992-01-01), Elgas

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