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DISHWASHER

  • US 3,612,714 A
  • Filed: 10/16/1969
  • Issued: 10/12/1971
  • Est. Priority Date: 10/16/1969
  • Status: Expired due to Term
First Claim
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1. A dishwasher, comprising:

  • a washing chamber having a liquidcollecting sump;

    a liquid recirculation centrifugal pump having an impeller including blades rotatable about an axis and having a generally circular discharge periphery adjacent the discharge portion of said blades;

    means providing an entRance for liquid to said blades adjacent said axis;

    means providing an exit conduit including a diffusing exit annulus surrounding said impeller discharge periphery and substantially coaxial therewith and having a height normal to the flow through said annulus that is less than the corresponding height of said blades at said periphery and an exit passage all connected in series with each other, said impeller being rotatable in a reverse direction during drainage of liquid from said washing chamber; and

    air vent passage means having one end opening between said impeller discharge periphery and the exit annulus and a second end opening above the liquid level in said chamber.

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