Positive displacement pump with impeller and method of manufacturing
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United States of America Patent
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Oct 16, 2012
Grant Date -
Oct 20, 2011
app pub date -
Dec 22, 2009
filing date -
Dec 23, 2008
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Abstract
A rotary positive displacement pump (1) that includes an impeller (3) that defines, within a pumping chamber (20), a plurality of successive chambers (21) with variable volume through which a fluid is mechanically conveyed from an inlet (7) to an outlet (8). The chambers (21) with variable volume are defined, at axially opposite ends, by a pair of rotational surfaces (40, 50) that close the pumping chamber (20) and are arranged to rotate about mutually inclined axes. Also described is a method of manufacturing the pump.
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