Two stage vacuum pump having different diameter interengaging rotors
US5449276A · kind A · utility
4Cited by
23References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1993 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | Jan 27, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2240/51
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fluid rotating apparatus includes a plurality of rotors accommodated in a housing, at least one of the rotors having its outer diameter different from that of the other of the rotors. Bearings are provided for supporting rotary shafts of the plurality of rotors. A fluid suction port and a fluid discharge port are formed in the housing. A motor is provides for rotating at least one of the plurality of rotors, and a control system for synchronously controlling the plurality of rotors in a contactless manner is provided for each rotary shaft of the plurality of rotors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.