Pump unit and method for operating a pump unit
US7264450B2 · kind B2 · utility
1Cited by
6References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 22, 2000 |
| Grant date | Sep 4, 2007 |
| Priority date | — |
| Expiry date | Sep 14, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2260/6022
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The method is provided for operating a pump unit with a centrifugal pump which is driven by an electric motor and which comprises a rotor running in a split tube. The rotor space is separated with respect to the stator in a fluid-tight manner. On running the motor to its operational rotational speed the fluid located in the rotor space due to the increasing rotational speed evaporates and is removed so that the motor finally functions as a dry-runner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.