Vortex vacuum cleaner nozzle with means to prevent plume formation
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United States of America Patent
Stats
-
Dec 5, 2006
Grant Date -
Apr 15, 2004
app pub date -
Jun 9, 2003
filing date -
May 21, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is a novel design for a recirculating vacuum cleaner nozzle that addresses the problem of pluming by venting some internal fluid to the atmosphere. The nozzle guides fluid flow around an inner shroud within a housing. The distal end of the nozzle is exposed to the atmosphere such that air passes rapidly across its face from the outside edges to the inner duct. This rapidly moving airflow picks up dust and debris and carries it to the interior of the inner duct. Dusty air within this duct is preferably cleaned with a separator. After the fluid is cleaned, it may be sent back to the nozzle to pick up more debris. Use of the nozzle of the present invention in conjunction with a separator allows sufficient air to enter the nozzle to prevent pluming and allows the same amount of air to exit via shaped vent holes while retaining dust in the system.
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