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VACUUM CLEANER WITH EXHAUST TUBE HAVING AN INCREASING CROSS-SECTIONAL AREA

  • US 20120047682A1
  • Filed: 09/01/2011
  • Published: 03/01/2012
  • Est. Priority Date: 09/01/2010
  • Status: Abandoned Application
First Claim
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1. A vacuum cleaner comprising:

  • a cyclonic chamber having an inlet for introducing airflow for circulation around a central axis of the cyclonic chamber;

    a filter chamber positioned downstream of the cyclonic chamber and having a wall;

    a filter positioned in the filter chamber; and

    an exhaust tube extending along the central axis into the cyclonic chamber, the exhaust tube including an inlet portion receiving the airflow from the cyclonic chamber and an outlet portion directing the airflow toward the filter chamber and the filter, which is in close proximity to the outlet portion, wherein the outlet portion includes an outlet opening on the wall of the filter chamber upstream of the filter, wherein the cross-sectional area of the outlet portion increases in the downstream direction to reduce the speed of the airflow passing into the filter chamber and to evenly distribute the airflow passing through the outlet opening across the filter, and wherein the exhaust tube defines a substantially constant diameter over a portion of its length.

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