Vacuum pump
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United States of America Patent
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Jun 26, 2012
Grant Date -
Feb 5, 2009
app pub date -
Oct 19, 2005
filing date -
Nov 1, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A vacuum pump (100) comprises a pumping mechanism having an annular pumping chamber (112, 114, 116) extending about a longitudinal axis (107) and through which fluid is pumped by the pumping mechanism. A plenum (126) located remote from the pumping mechanism has an inlet (128) for receiving fluid to be pumped by the pumping mechanism and a plurality of outlets (132) arranged about the longitudinal axis (107) for supplying fluid to the annular chamber.
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