Liquid level sensor for controlling pump operation
US4678403A · kind A · utility
21Cited by
12References
5Claims
0Family size
Inventors
Key dates
| Filing date | Aug 1, 1985 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Aug 1, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B49/025
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention concerns a bilge pump control system. Sensing of water level in the bilge is accomplished by the conduction of current (on the order of one milliampere) between two stainless steel probes. The probes are mounted in a triangular package which is placed in the boat bilge. When immersed, a conduction path is provided between the probes. One edge of the package is aligned with the probes to enhance water run-off. An associated circuit is activated when the conduction path is present (when the probes are immersed) which operates the bilge pump in a time-hysteresis fashion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.