Patent 4243431 Issued on January 6, 1981. Estimated Expiration Date: June 14, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
134/104.1, Having self cleaning means134/109, With treating fluid purifying or separating means134/186, With means to drain from and/or supply liquid to tank210/532.1Heavier constituent trap, chamber, or recess
A dishwasher apparatus having an improved soil separator arranged to bypass a portion of the dishwashing liquid being circulated by the circulation impeller and to separate from the bypass portion of the dishwashing liquid soil which may have been entrained therein. The cleansed dishwashing liquid is then returned to the circulation system for reuse in effecting the dishwashing operation. The soil separator is further arranged to separate from the dishwashing liquid delivered thereto air which may have been entrained in the liquid and return the air to the dishwashing liquid being circulated for washing the dishes. The structure for collecting the soil is arranged to collect the soil from a relatively slowly moving portion of the bypassed liquid. The soil separator structure is arranged to effectively discharge the collected soil to drain upon initiation of a drain operation. The drain port is disposed downstream of the collecting space and the separator structure is arranged to cause flow of dishwashing liquid past the collecting space and concurrently reversely from the outlet of the separator structure so as to provide a turbulent delivery of the collected soil to the drain port. The drain port is arranged to be maintained free of collected soil during the normal operation of the dishwasher and may be disposed adjacent the return outlet of the separator structure. The cross section of the liquid bypass passage may gradually increase from the inlet to the outlet thereof to facilitate separation of the soil from the dishwashing liquid. The drain port is located in an area of relatively rapid movement of the dishwashing liquid to provide improved cleansing of the drain port in the draining operation.