Dishwashing machine with a single-motor pump unit

Details Dishwashing machine with a single-motor pump unit Dishwashing machine with a single-motor pump unit

1991-05-30

1992-07-21

Look, Edward K.

Cleaning and liquid contact with solids

Apparatus

Having self cleaning means

134111, 134180, 415 564, 415 565, 415 584, A47L 1522

Patent

active

051314207

ABSTRACT:
A dishwashing machine has a single motor pump unit, including a circulating centrifugal pump and a peripheral outflow drain pump mounted on a common shaft of a reversible drive motor to alternately deliver a washing fluid to and drain fluid from the dishwashing machine. The two pumps are connected by openings in their respective pump chambers communicating with an annular chamber between the two pumps. The annular chamber has a vent fluidly connecting the chamber with a washing water circuit of the dishwashing machine. Preferably the annular chamber has an impeller therein mounted on the drive shaft of the motor, forming a further centrifugal pump with the annular chamber.

REFERENCES:
patent: 2019143 (1935-10-01), La Bour
patent: 4799855 (1989-01-01), Milocco et al.
patent: 4972861 (1990-11-01), Milocco et al.

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