Pump with magnetic bearings
US4541772A · kind A · utility
24Cited by
2References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 19, 1983 |
| Grant date | Sep 17, 1985 |
| Priority date | — |
| Expiry date | Oct 19, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2360/45
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A turbo-molecular pump with passive, radial magnetic bearings and axial bearings has both direct and indirect damping arrangements for unwanted oscillations. Direct damping is produced by eddy currents produced in copper rings around the magnetic stators of the magnetic bearings. Indirect damping is provided through a platform, carried by springs and connected to the pump housing by oscillation dampers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.