Sump system having timed switching of plural pumps

Details Sump system having timed switching of plural pumps Sump system having timed switching of plural pumps

1994-03-24

1995-09-12

Bertsch, Richard A.

Pumps

Condition responsive control of pump drive motor

Plural pumps having separate drive motors, supply sources,...

417 12, 417 41, F04B 4106, F04B 49025

Patent

active

054492742

ABSTRACT:
An electronic pump selector system uses a programmable processor to select one of a plurality of pumps to be energized in response to an appropriate feedback signal from the selected pump. A current limited feedback circuit is incorporated which provides a varying voltage in response to a level switch associated with a selected pump indicating a high fluid level. In response to the voltage feedback signal, the selected pump is energized for a predetermined period of time. Subsequently, another pump is selected. The next selected pump is energized also for a predetermined period of time in response to a varying voltage feedback signal therefrom. The next pump is then selected and the sequence continued.

REFERENCES:
patent: 3741683 (1973-06-01), McTamaney et al.
patent: 3744932 (1973-07-01), Prevett
patent: 4341983 (1982-07-01), Gottliebson
patent: 4437811 (1984-03-01), Iwata et al.
patent: 4444545 (1984-04-01), Sanders et al.
patent: 4551068 (1985-11-01), Boudreaux
patent: 5343384 (1994-08-01), Fisher et al.

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