DEVICE FOR TRANSPORTING POWDERS ALONG PIPES
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United States of America Patent
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Issued Date -
Nov 4, 2010
app pub date -
Sep 16, 2008
filing date -
Sep 18, 2007
priority date (Note) -
Abandoned
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Abstract
A device for transporting powders through pipes comprises at least one pumping unit (11, 111) in turn comprising a pumping chamber (12) with a powders inlet (13) and outlet (14) end, such ends being closable in a controlled manner by respective inlet and outlet controlled valves (15, 16). The pumping chamber (12) is laterally delimited by a wall (17) permeable to air but not to powder, such wall in turn being enclosed in a sealed shell (18). Present between the permeable wall and the internal wall of the sealed shell is an interspace (23) connected in a controlled manner to a source of pressure (21) in a first zone (19) in proximity to the inlet zones of the pumping chamber and to a source of vacuum (22) in a second zone (20) in proximity to the outlet ends of the pumping chamber.
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