Fluidized powder flowrate measurement method and device
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United States of America Patent
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Oct 4, 1994
Grant Date -
N/A
app pub date -
Aug 7, 1992
filing date -
Aug 12, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The flowrate of powder in an air-powder mixture circuit comprising a mixture drive area defined by a powder drive device comprising air injector means adapted to inject air in the direction in which the mixture is to be driven is measured by measuring the pressure difference across the drive area and the injected air flowrate and computing the powder flowrate as a function of these two variables. The degree of wear of a venturi tube which forms the drive area is calculated by integrating with respect to time two parameters representing air-powder mixture flow rate and the air flow rate.
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