Impeller construction for centrifugal pump of two-pump pump unit
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United States of America Patent
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-
Jan 24, 1989
Grant Date -
N/A
app pub date -
Oct 30, 1987
filing date -
Nov 27, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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