The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 1992
Filed:
Aug. 19, 1991
Edward L Thies, Monroe Township, Miami County, OH (US);
Theodore F Meyers, Monroe Township, Miami County, OH (US);
Whirlpool Corporation, Benton Harbor, MI (US);
Abstract
A wash arm assembly for a dishwasher includes a plurality of wash arms extending radially from a hub. The hub includes an interior fluid passageway, and is rotatably mounted on a dishwasher soil separator. Each wash arm includes a plurality of apertures for permitting wash liquid to flow therethrough, at least one of which on each spray arm is directed downwardly to provide a downwardly directed cleansing spray of wash liquid. Mounted to the wash arms is a disc-shaped filter guard which includes a plurality of elongate apertures, each of which apertures corresponds to a downwardly directed wash arm aperture. Disposed within each elongate aperture is an elongate tab having a planar surface, which is disposed adjacent to and partially overlying the corresponding wash arm aperture. The soil separator includes an upward-facing cover, which cover includes an annular fine filter coaxially located with the wash arm assembly axis. In operation, wash liquid is pumped into the wash arm assembly, causing the wash arm assembly to rotate, each wash arm providing a downwardly directed fan-shaped spray. As the wash arm assembly rotates, each fan-shaped spray describes an arcuated path corresponding to the annular fine filter, thereby providing an effective backflushing action.