Pump control system

Details Pump control system Pump control system

2011-03-08

2011-03-08

Freay, Charles G (Department: 3746)

Pumps

Condition responsive control of pump drive motor

Single motor control element responsive to means sensing...

C417S043000, C417S141000

Reexamination Certificate

active

07901190

ABSTRACT:
A pumping system in which a pump (5) is controlled by a programmed controller (22) in response to input signals from an inlet pressure transducer (3) and an outlet pressure transducer (15) and in certain circumstances inputs from various flow sensors (4,19). The controller (22) can be programmed to allow the pump (5) to prematurely operate before an outlet pressure reaches a low pressure threshold, when usage of the liquid is high. The controller (22) can be programmed to detect a lack of prime of the pump (5), to restore prime once the pump (5) has lost prime, and to prevent successive on/off pump cycles when the outlet flow is continuous and at a moderate or low level.

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Derwent Abstract Accession No. G0119 D/26, Oct. 7, 1980, Orlov.

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