Pumping stage for a vacuum pump
US6877949B2 · kind B2 · utility
4Cited by
2References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 5, 2003 |
| Grant date | Apr 12, 2005 |
| Priority date | — |
| Expiry date | May 5, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D19/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pumping stage for a vacuum pump, has an improved geometry allowing an optimum trade-off to be achieved between the exhaust pressure and the pumping rate attained in that stage. In the pumping stage (1) the axial extension that is the height of the pumping channel (3) varies along the circumference of the channel (3) between the inlet port (13) and the outlet port (15).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.