Vacuum pump
US8393854B2 · kind B2 · utility
1Cited by
20References
45Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2004 |
| Grant date | Mar 12, 2013 |
| Priority date | — |
| Expiry date | Nov 29, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D19/044
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A vacuum pump comprises a first pumping section (106), and, downstream therefrom, a second pumping section (108), The pump comprises a first pump inlet (120) through which fluid can enter the pump and pass through both the first and second pumping sections towards a pump outlet, and a second pump inlet (122) through which fluid can enter the pump and pass through only the second pumping section towards the outlet. The second pumping section (108) comprises an externally threaded rotor (109).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.