Cleaning and liquid contact with solids – Apparatus – With movably or flexibly mounted spray or jet applying...
Patent
1991-08-19
1992-11-24
Coe, Philip R.
Cleaning and liquid contact with solids
Apparatus
With movably or flexibly mounted spray or jet applying...
210411, A47L 1523, A47L 1542
Patent
active
051654350
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.
REFERENCES:
patent: 3575185 (1971-04-01), Barbulesco
patent: 3809106 (1974-05-01), Crabtree
patent: 4038103 (1977-07-01), Grunewald
patent: 4392891 (1983-07-01), Meyers
patent: 4673441 (1987-06-01), Mayers
patent: 4972861 (1990-11-01), Milocco et al.
Meyers Theodore F.
Thies Edward L.
Coe Philip R.
Krefman Stephen D.
Roth Thomas J.
Turcotte Thomas E.
Whirlpool Corporation
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