Scroll vacuum pump
US6290477A · kind A · utility
33Cited by
7References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 9, 2000 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Mar 9, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C18/0223
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The scroll pump has the capability of preserving a minimal play between the joints disposed on the ridges of each of the spiraling walls and the flat wall facing it. Such an arrangement, possible owing to the slight difference in pressure prevailing between two adjacent transfer chambers, makes it possible to prevent wear and tear on the joints, soiling of the transfer chambers as well as overheating due to friction on the joints.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.