Submersible pump with alternate pump operation control means

Details Submersible pump with alternate pump operation control means Submersible pump with alternate pump operation control means

1980-06-30

1984-03-20

Look, Edward K.

Pumps

Condition responsive control of pump drive motor

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

417 36, 417 40, F04B 4904

Patent

active

044378114

ABSTRACT:
A submersible pump adapted to pump out the liquid in a reservoir has a built-in control unit for alternate pump operation. The control unit includes step memory means which provides a signal to permit the starting of pump operation every other time a high liquid level sensor senses the liquid. Once started, the pump continues its operation until the liquid level drops below a low liquid level sensor. The submersible pump can be combined with an additional pump having a conventional control unit in which case the two pumps are alternately operated.

REFERENCES:
patent: 2797702 (1957-07-01), Martin
patent: 3424370 (1969-01-01), Law
patent: 3568121 (1971-03-01), Nash
patent: 3741683 (1973-06-01), McTamaney et al.
patent: 3744932 (1973-07-01), Prevett
patent: 4171186 (1979-10-01), Chapman
patent: 4179242 (1979-12-01), Tateshita et al.
patent: 4222711 (1980-09-01), Mayer
patent: 4297081 (1981-10-01), Irvin

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