Dense phase pump for dry particulate material
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United States of America Patent
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Dec 18, 2012
Grant Date -
Mar 31, 2011
app pub date -
Dec 9, 2010
filing date -
Nov 24, 2003
priority date (Note) -
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Abstract
A dense phase pump for particulate material includes a pump chamber wherein material flows into the pump chamber under negative pressure and flows out of the pump chamber under positive pressure. A plurality of pinch valves are provided to control flow of material into and out of the pump chamber. The pinch valves are operated independent of each other and of the pump cycle rate. A modular design of the pump is provided.
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