Washing machine including improved apparatus for cleaning a reci

Details Washing machine including improved apparatus for cleaning a reci Washing machine including improved apparatus for cleaning a reci

1989-11-22

1990-11-27

Stinson, Frankie L.

Cleaning and liquid contact with solids

Apparatus

Having self cleaning means

134111, 134200, 210411, B08B 302

Patent

active

049728610

ABSTRACT:
A dishwashing machine includes a recirculating pump having a casing, an inlet communicating with a sump of a washing tub, an outlet communicating with a spray arm located above the sump, and an impeller rotatable within the casing in a recirculating direction during a washing phase of operation of the machine and rotatable in a direction opposite to the recirculating direction during a drain phase of operation of the machine. A recirculating filter is positioned between the spray arm and the sump. To ensure that all water collected in the sump adjacent the inlet of the recirculating pump is discharged during the drain phase of operation of the machine, a conduit has a first end connected to the interior of the casing of the recirculating pump and a second end positioned adjacent the recirculating filter. A passage through the conduit has a cross section that is calibrated to achieve, upon the impeller of the recirculating pump rotating in the opposite direction thereof, discharge of water collected in the sump adjacent the inlet of the recirculating pump as a water jet from the second end of the passage. Such water jet passes through and cleans the recirculating filter and is directed toward the intake of a drain pump of the machine.

REFERENCES:
patent: 3457929 (1969-07-01), Madden
patent: 3810480 (1974-05-01), Smith et al.
patent: 3989054 (1976-11-01), Mercer
patent: 4168715 (1979-09-01), Spiegel et al.

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