Dishwasher cycle--initial cycles lower spray arm only

Details Dishwasher cycle--initial cycles lower spray arm only Dishwasher cycle--initial cycles lower spray arm only

1996-08-05

1998-12-15

Achutamurthy, Ponnathapura

Cleaning and liquid contact with solids

Processes

Combined

134 252, 134 953, 134113, 134172, 134178, 134 10, B08B 920, B08B 704, B08B 300

Patent

active

058491015

ABSTRACT:
A method of washing objects in a dishwasher having upper and lower spray arms within a wash chamber and a sump filter. Wash liquid entering a sump from the wash chamber to be recirculated by a pump is filtered the filter to prevent soils from entering the sump and being recirculated. When the lower spray arm is operating, wash liquid is directly sprayed onto the filter from a clean-out nozzle on the lower spray arm to clean soils off the filter and prevent the filter from clogging. During a pre-wash cycle and at least one pre-rinse cycle, wash liquid is continuously sprayed from only the lower spray arm to prevent the filter from clogging when heavy soils are removed. During a wash cycle and at least one rinse cycle, wash liquid is alternately sprayed from the lower spray arm and the upper spray arm when the heavy soils have already been removed and it is less likely the filter will become clogged.

REFERENCES:
patent: 3440399 (1969-04-01), Reifenberg
patent: 3648931 (1972-03-01), Jacobs
patent: 4094702 (1978-06-01), Rabuffetti
patent: 4135531 (1979-01-01), Federighi et al.
patent: 4159211 (1979-06-01), Hoffman et al.
patent: 4741353 (1988-05-01), Milocco
patent: 5264043 (1993-11-01), Milocco
patent: 5435885 (1995-07-01), Jones et al.
patent: 5494062 (1996-02-01), Springer
patent: 5525161 (1996-06-01), Milocco et al.

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