Stirring apparatus
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United States of America Patent
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May 3, 2011
Grant Date -
May 1, 2008
app pub date -
Sep 15, 2005
filing date -
Sep 21, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A mixer capable of developing suitable stirring characteristics by forming a sufficient vertical circulation flow over the entire part of the inside of a tank, wherein an opening is formed in a stirring blade under the following conditions: (i) the ratio of the opening area of the opening in the upper half of the stirring blade to the overall area of the upper part of the stirring blade (the opening rate in the upper half of the stirring blade) is 45 to 80%, (ii) the ratio of the opening area of the opening in the lower half of the stirring blade to the overall area of the lower half of the stirring blade (the opening rate in the lower half of the stirring blade) is 18 to 50%, and (iii) the ratio of the opening rate in the lower half of the stirring blade to the opening rate in the upper half of the stirring blade is 31 to 71%.
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