Patent ID: 9655495
Date: 2017-05-23
CPC Classifications: A47L,B01D,C02F

Claim:
1. A dishwasher for treating dishes according to at least one automatic cycle of operation, comprising: a tub at least partially defining a treating chamber for receiving dishes for treatment according to the at least one automatic cycle of operation; a sump fluidly coupled to the tub and configured to collect liquid supplied to the tub; a recirculation pump having an inlet fluidly coupled to the sump and an outlet fluidly coupled to the tub to recirculate liquid from the sump to the treating chamber; and a foreign object protection system comprising an inclined grate having a lower end and an upper end, a first incline, a first valley, a second incline, and a second valley, and wherein the foreign object protection system is disposed in the sump and separating the tub and the outlet, and a plurality of openings provided in the grate, with some of the openings near the lower end being smaller than some of the openings near the upper end; wherein the first valley is located upstream of the first incline, the second incline is located downstream of the first valley, and the second valley is located upstream of the second incline, and wherein liquid in the tub collects in the sump and may be recirculated by actuating the recirculation pump such that the liquid in the sump may be drawn through the grate and expelled through the outlet to the tub and the grate retains objects that cannot pass through the grate.