Eccentric pump and method for operation of said pump
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United States of America Patent
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-
Mar 6, 2007
Grant Date -
Jul 28, 2005
app pub date -
Feb 18, 2003
filing date -
Mar 22, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A pump (1) is provided with a housing (2), having an inlet (28) and an outlet (29), a drive (5), a fixed cylinder (2) centered on a mid-axis (9), a displacer (18), rotating eccentrically within the cylinder (2), a crank drive (13) for the displacer (18), a circumferential sickle-shaped pumping chamber (26) between the cylinder (2) and displacer (18) and a helical sealing element (27, 27', 27'', 39) in the pumping chamber (26). The pump is a dry vacuum pump, whereby the displacer (18) circulates in the cylinder (2) without making contact.
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