Rotary vacuum blower
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United States of America Patent
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Apr 1, 2008
Grant Date -
Nov 30, 2006
app pub date -
May 26, 2006
filing date -
May 31, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
An impeller, set in rotation by a motor, provided with blades and enclosed in a casing which defines a circumferential annular conduit in which the blades turn. The annular conduit exhibits two openings, respectively an induction mouth for aspirating fluid from outside the machine, and a delivery mouth from which the fluid exits from the machine. The machine also comprises a further opening which is neither the induction mouth nor the delivery mouth, afforded on the casing and defining a passage which places an inside of the casing in communication with an outside environment.
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