Pumps
US4832564A · kind A · utility
4Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1988 |
| Grant date | May 23, 1989 |
| Priority date | — |
| Expiry date | Jun 20, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S415/914
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A turbo-molecular pump has stator discs 2 separated from one another by spacer rings 3 constructed in such a manner that gases streaming back can re-enter the suction space 8 through reduced portions 5 at the outer diameter and through radial recesses 6. Inner reduced portions 7 serve for the additional location of the stator discs 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.