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Air flow passage for a cyclonic separator and vacuum cleaner having same

  • US 6,599,340 B2
  • Filed: 07/08/2002
  • Issued: 07/29/2003
  • Est. Priority Date: 01/08/1999
  • Status: Expired due to Term
First Claim
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1. A fluid conduit in an air flow passage of a vacuum cleaner extending from point S1 to point S2 and comprising a space curve around which the fluid conduit is formed wherein the gradient of the space curve has at least two non-zero components which vary along the arc length of the curve.

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