Compressors
US6296441A · kind A · utility
23Cited by
35References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 3, 1998 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Aug 3, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/584
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An oil free high speed gas compressor driven by a high frequently electric motor with a soft magnetic armature which holds permanent magnets arranged peripherally and a centrifugal impeller overhung at one or at each end of the shaft of the armature of the motor, wherein the temperature of the armature is held within the characteristic temperature of its permanent magnets by a flow of cooling liquid through a central bore in the armature or by a flow of cooling liquid through a central drilling through a tie-bolt in thermal contact with a bore in the armature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.