Pump control system

Details Pump control system Pump control system

1982-04-08

1984-04-24

Look, Edward K.

Pumps

Condition responsive control of pump drive motor

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

307118, 417 36, 417 38, 417 40, 417 63, F04B 4106

Patent

active

044445458

ABSTRACT:
This is a digital solid state control system for pumping liquid to regulate the condition of the liquid in a container, such as the liquid level. One pump is turned on when the liquid rises to one level, and another pump is turned on when the liquid rises to a higher level. An alarm is activated if the liquid rises to a still higher level or if a leak occurs in either pump. The control system alternates which pump turns on first in successive operating cycles. If a power failure occurs while both pumps are on, when power is restored only one pump comes on immediately; the other comes on only after a time delay.

REFERENCES:
patent: 2157329 (1939-05-01), Fillo
patent: 3050003 (1962-08-01), Edwards
patent: 3136871 (1964-06-01), Barletta
patent: 3667022 (1972-05-01), Quinn
patent: 3914752 (1975-10-01), Howard et al.
patent: 4179242 (1979-12-01), Tateshita et al.
patent: 4297081 (1981-10-01), Irvin

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