Dishwasher pump and drain system

Details Dishwasher pump and drain system Dishwasher pump and drain system

2004-02-13

2008-08-12

Stinson, Frankie L (Department: 1792)

Cleaning and liquid contact with solids

Apparatus

With treating fluid purifying or separating means

C134S186000

Reexamination Certificate

active

07409961

ABSTRACT:
A dishwasher includes a pump assembly which functions to chop all fluid entrained soil prior to directing fluid to upper and lower wash arms. A flow conduit leading to the upper wash arm is provided with a sampling port which directs a percentage of the fluid flow into a filter chamber having one or more fine mesh filter screens that open into the dishwasher tub basin. The filter chamber is exposed to a collection chamber that leads to a flapper valve and then to a drain port. A sealing chamber joins the filter chamber with the collection chamber. A sealing member is positioned in the sealing chamber to selectively seal the filter chamber after a portion of the fluid is drained. Once sealed, a drain pump expels the fluid from the washing tub. After the tub is empty, the remainder of the fluid is drained from the filter chamber.

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