Cleaning and liquid contact with solids – Apparatus – Having self cleaning means
Patent
1993-05-04
1994-08-02
Coe, Philip R.
Cleaning and liquid contact with solids
Apparatus
Having self cleaning means
134111, 134179, A47L 1523
Patent
active
053336313
ABSTRACT:
The present invention provides a wash arm for a dishwasher which includes first and second openings which simultaneously propel the wash arm and rinse or back-flush filtered debris from a filter. The filter includes a settling chamber and a mesh screen, the mesh screen defining a portion of the top surface of the settling chamber and including inner and outer surfaces. Wash water flows through the mesh screen from the inner surface to the outer surface, causing filtered debris to be retained or trapped on the inner surface of the filter. The openings in the wash arm are downwardly and outwardly directed, and supply rinsing jets of wash water which impinge upon the outer surface of the filter and rinse retained debris from the inner surface thereof. The rinsed debris is thereafter held and suspended within the settling chamber until the dishwasher is drained. The pair of openings are radially displaced first and second distances from a center of the wash arm. Reaction forces produced by water exiting the openings combine or cooperate, resulting in a net reaction force which rotatably drives the wash arm about its axis of rotation at a predetermined rate.
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Kirkland Daniel R.
Sublette Mark A.
Coe Philip R.
White Consolidated Industries, Inc.
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