Hydrodynamic pump units and regulators therefor

Details Hydrodynamic pump units and regulators therefor Hydrodynamic pump units and regulators therefor

1977-04-06

1980-06-17

Croyle, Carlton R.

Pumps

Condition responsive control of pump drive motor

With control of pump drive transmission

60337, 417 24, 417 40, 417368, 417370, F04B 4900, F04B 4904

Patent

active

042081718

ABSTRACT:
A fluid pumping system includes a pump driven at a variable speed by a motor connected to the pump by a fluid cooled transducer. A regulator, connected to the transducer, controls, the speed of the pump responsive to an analog signal related in value to the flow rate of the pump and responsive to a control signal provided by a pump cycle controller. The pump cycle controller senses the level of a basin of fluid to be pumped and provides the control signal. The control signal is operative to start the pump when the fluid level reaches a predetermined starting level, to vary the pump speed responsive to changes in fluid levels higher than the starting level, and to run the pump at a minimum speed when the fluid level is between the starting level and a predetermined stopping level, lower than the starting level.

REFERENCES:
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patent: 3285181 (1966-11-01), Howard
patent: 3306219 (1967-02-01), Englesson
patent: 3318253 (1967-05-01), Campolong
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patent: 3424090 (1969-01-01), Hyde
patent: 3644067 (1972-02-01), Yowell
patent: 3751185 (1973-08-01), Gottliebson et al.
patent: 3800205 (1974-03-01), Zalar
patent: 3951242 (1976-04-01), Fischer et al.
patent: 3999385 (1976-12-01), Hoeller et al.
patent: 4013384 (1977-03-01), Oikawa

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