Impeller construction for centrifugal pump of two-pump pump unit

Details Impeller construction for centrifugal pump of two-pump pump unit Impeller construction for centrifugal pump of two-pump pump unit

1987-10-30

1989-01-24

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

Plural runners having different type flow paths

4151981, 416186R, F04D 2300

Patent

active

047998555

ABSTRACT:
A pump unit, particularly for use in a dishwasher, includes first and second pumps having respective impellers and a motor drive shaft fixed to the two impellers for alternately rotating the impellers in a first direction, during which only the first pump delivers a liquid, and an opposite second direction during which only the second pump delivers a liquid. The first pump is a peripheral outflow pump, and the second pump is a centrifugal pump the impeller of which includes blades oriented forwardly with respect to the second direction of rotation.

REFERENCES:
patent: 3099992 (1963-08-01), La Flame
patent: 3300122 (1967-01-01), Bowles et al.
patent: 3324796 (1967-06-01), La Flame
patent: 3542496 (1970-11-01), Bergeson et al.
patent: 3583826 (1971-06-01), Schonwald et al.
patent: 3782851 (1974-01-01), Hackbarth et al.
patent: 4231706 (1980-11-01), Ueda et al.

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