Submersible pump with alternate pump operation control means
US4437811A · kind A · utility
43Cited by
9References
10Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 30, 1980 |
| Grant date | Mar 20, 1984 |
| Priority date | — |
| Expiry date | Jun 30, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D15/029
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A submersible pump adapted to pump out the liquid in a reservoir has a built-in control unit for alternate pump operation. The control unit includes step memory means which provides a signal to permit the starting of pump operation every other time a high liquid level sensor senses the liquid. Once started, the pump continues its operation until the liquid level drops below a low liquid level sensor. The submersible pump can be combined with an additional pump having a conventional control unit in which case the two pumps are alternately operated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.