Liquid level sensor, pump system means and circuit means
US4205237A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1977 |
| Grant date | May 27, 1980 |
| Priority date | — |
| Expiry date | Dec 16, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/241
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A plurality of probes are situated as to experience being touched by liquid which is being monitored; when both of such probes are 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 delay activation of said pumping means thereby preventing unnecessary activation of the pumping means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.