Sump pump
US5708313A · kind A · utility
15Cited by
9References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1996 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Oct 28, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/128
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A sealess sump pump comprises an impeller chamber mounted at the bottom of a pump column, an impeller journaled in the impeller chamber, a rare earth driven magnet assembly fixed to rotate with the impeller, a rare earth driving magnet assembly mounted at the lower end of an elongate pump shaft and a nonmagnetic barrier between the driving and the driven magnet assemblies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.