Dishwasher pump and filtration system

Details Dishwasher pump and filtration system Dishwasher pump and filtration system

2004-08-31

2008-12-23

Barr, Michael (Department: 1792)

Cleaning and liquid contact with solids

Apparatus

With treating fluid purifying or separating means

C134S184000, C134S186000, C134S11500R

Reexamination Certificate

active

07467636

ABSTRACT:
A dishwasher includes a pump assembly having a multi-stage filtering arrangement which functions to trap soil particles contained in a washing fluid to reduce the number of fresh water fills required to perform a washing operation. All of the washing fluid is initially directed over a filter plate. A first portion of the washing fluid passes the filter plate into a pumping chamber, while a second, soil laden portion, enters a first filter chamber. The second portion is then directed through a medium filter into the intake chamber. The filtered washing fluid is pumped through a conduit to wash arms that spray the washing fluid onto kitchenware. The conduit includes a sampling port which directs a portion of the washing fluid to a second filtering compartment having a fine mesh screen. At the end of the washing operation, the washing water, along with the soil is expelled from the dishwasher.

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