Vacuum cleaner
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United States of America Patent
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-
May 29, 2001
Grant Date -
N/A
app pub date -
Jan 8, 1999
filing date -
Jan 8, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method for filtering a dirty air stream in a vacuum cleaner to obtain a clean air stream has subjecting the dirty air stream to a first cyclonic separation stage to obtain a partially cleaned air stream and subjecting the partially cleaned air stream to a second cyclonic separation stage and an electronic filtration stage to obtain the clean air stream.
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