Measuring and testing – Testing of material
Reexamination Certificate
2007-07-10
2007-07-10
Raevis, Robert (Department: 2856)
Measuring and testing
Testing of material
Reexamination Certificate
active
11177615
ABSTRACT:
A bed of particulate solids is fluidized in a test chamber to yield multiple test samples for subsequent evaluation of segregation effects. A controlled stream of gas enters the chamber in a series of flow rate cycles each progressively increasing to a maximum rate of gas flow and then decreasing, the maximum rate increasing for successive cycles. An indicating function is formed from measurements of corresponding rates of gas flow and pressure across the bed. Upon termination of the fluidization, multiple samples are sequentially extracted from a single space at the bottom of the test chamber.
REFERENCES:
patent: 6487921 (2002-12-01), Prescott et al.
ASTM International, “Standard Practice for Measuring Fluidization Segregation Tendencies of Powders,” Designation: D 6941-03.
Hullin, Lu, et al., “Size segregation of binary mixture of solids in bubbling fluidized beds,”Powder Technology, vol. 134:86-97 (2003).
Hoffmann, A.C., et al., “Segregation in a fluidised powder of a continuous size distribution,”Powder Technology, vol. 66:119-126 (1991).
Brone Dean Lance
Clement Scott A.
Hancock Bruno Caspar
Hedden David Bruce
McCall Michael A.
Jenike & Johanson, Inc.
Lahive & Cockfield LLP
Raevis Robert
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