Single or multiple stage blower and nested volute(s) and/or impeller(s) therefor
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United States of America Patent
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Dec 6, 2016
Grant Date -
May 1, 2014
app pub date -
Dec 3, 2013
filing date -
Oct 28, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
An impeller comprising: a top shroud; a bottom shroud, a plurality of vanes extending from the top shroud to the bottom shroud, each said vane including a top edge at a radially inner portion of the vane in contact with the top shroud and a bottom edge at a radially outer portion of the vane in contact with the bottom shroud, such that a radially inner portion of the vane at the bottom edge of each vane is not in contact with or adjacent the bottom shroud and a radially outer portion of the vane at the top edge of each vane is not in contact with or adjacent the top shroud.
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