Patent ID: 9538898
Date: 2017-01-10
CPC Classifications: A47L

Claim:
1. A dishwasher for treating utensils according to a cycle of operation, comprising: a tub at least partially defining a treating chamber; a liquid spraying system supplying a spray of liquid to the treating chamber; a liquid recirculation system recirculating the sprayed liquid from the treating chamber to the liquid spraying system to define a recirculation flow path; a rotating filter having an upstream surface and a downstream surface and located within the recirculation flow path such that the recirculation flow path passes through the filter from the upstream surface to the downstream surface to effect a filtering of the sprayed liquid; a first artificial boundary spaced from and rotatable relative to one of the downstream and upstream surfaces; and a second artificial boundary spaced from and rotatable relative to the other of the downstream and upstream surfaces; wherein the first and second artificial boundaries have un-matched shapes and their relative rotation forms an increased shear force zone acting on the filter.