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Filter cleaning mechanisms

  • US 8,308,831 B2
  • Filed: 08/05/2010
  • Issued: 11/13/2012
  • Est. Priority Date: 04/04/2007
  • Status: Active Grant
First Claim
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1. A vacuum cleaner with a filter cleaning mechanism comprising:

  • a motor housing;

    a nose cone for collecting debris removably attached to a front end of the motor housing;

    a coarse filter assembly and a fine filter assembly located within the nose cone, the fine filter assembly nested within the coarse filter assembly;

    the fine filter assembly having teeth thereon that engage ribs on the coarse filter assembly; and

    wherein as the fine filter assembly is rotated with respect to the coarse filter assembly, the teeth contact the ribs and the fine filter assembly is compressed and uncompressed as it rotates.

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