Multirotor vacuum pump
US6241490A · kind A · utility
4Cited by
8References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 3, 1999 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Mar 3, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C29/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A multirotor vacuum pump including a housing, at least two rotors located in the housing and cooperating with each other so that as a result of a contactless movement of the at least two rotors relative to each other, working chambers, into which a to-be-pumped gas is fed, are formed, with at least one of the at least two rotors being hollow, and a drive formed as an external rotor motor having its rotor elements arranged on an inner surface of the at least two rotors, and stator elements fixedly mounted inside the at least one of the at least two rotors opposite the rotor elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.