Liquid level sensor, pump system means and circuit means

Details Liquid level sensor, pump system means and circuit means Liquid level sensor, pump system means and circuit means

1977-09-23

1979-10-23

Croyle, Carlton R.

Pumps

Condition responsive control of pump drive motor

Responsive to accumulation of pumped liquid in receiver

307118, 417 12, 417 44, 417 63, F04B 4906

Patent

active

041719328

ABSTRACT:
A plurality of probes are situated as to experience being touched by the liquid being monitored; when at least one of such probes is touched by the liquid related electrical circuit means becomes energized as to cause related pumping means to be activated thereby pumping some of the monitored liquid to, in turn, reduce the level of such monitored liquid; when the level of the monitored liquid decreases to a predetermined level, the pumping means is automatically de-activated; during periods wherein there might occur a momentary splashing or sloshing of the monitored liquid, time delay means serves to correspondingly delay activation of said pumping means thereby preventing unnecessary activation of the pumping means.

REFERENCES:
patent: 3030890 (1962-04-01), Galik
patent: 3094646 (1963-06-01), Swett
patent: 3502899 (1970-03-01), Jones
patent: 3540027 (1970-11-01), Rauth et al.
patent: 3726607 (1973-04-01), Garman
patent: 3741683 (1973-06-01), McTamaney et al.
patent: 3855515 (1974-12-01), Hutchins
patent: 4021700 (1977-05-01), Ellis-Arwyl
patent: 4047844 (1977-09-01), Robinson
patent: 4061442 (1977-12-01), Clark et al.

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