Rotary pump for pumping fluids, mainly sewage water
US6799944B2 · kind B2 · utility
2Cited by
8References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 25, 2003 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Feb 25, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D7/045
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
According to the invention the pump impeller comprises a hub (4) having one or several vanes swept backwards within a pump housing (1). The latter is provided with one or several relief grooves (8) on the inside of the pump housing wall. One or several radially directed scraping apparatus (10) are attached to the pump housing creating narrow slots at the leading edges (6) of the impeller vanes and causing pollutants on said edges to be fed into the grooves (8).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.