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Rotating filter for a dishwashing machine

  • US 9,211,047 B2
  • Filed: 01/15/2014
  • Issued: 12/15/2015
  • Est. Priority Date: 12/21/2009
  • Status: Active Grant
First Claim
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1. A method of operating a dishwasher comprising a washing chamber holding utensils for washing, sprayers for spraying liquid on the utensils, and a liquid recirculation system, for recirculating sprayed liquid back to the sprayers, and including a filter for filtering the liquid, the method comprising:

  • spraying liquid within the washing chamber;

    recirculating the sprayed liquid for subsequent spraying;

    providing a filter within the recirculating liquid where the filter completely fluidly divides the recirculating liquid such that the filter has an upstream surface confronting unfiltered liquid and a downstream surface confronting filtered liquid;

    providing an artificial boundary spaced apart from at least a portion of the upstream surface to form a gap between the artificial boundary and the upstream surface; and

    rotating the filter within the liquid during the recirculating of the liquid;

    wherein the liquid passing between the artificial boundary and the rotating filter caused by rotation of the filter applies a shear force on the upstream surface that is greater than the liquid in an absence of the artificial boundaryand aids in a removal of soils on the upstream surface.

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