Speed control of variable speed pump
US6739840B2 · kind B2 · utility
13Cited by
18References
25Claims
0Family size
Inventors
Key dates
| Filing date | May 22, 2002 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Jun 3, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/70
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Method, article of manufacture and apparatus for monitoring operating characteristics of a system comprising a variable speed vacuum pump. Operating characteristics reflective of gas load on the pump are observed for behavior indicating a change in the gas load. In one embodiment, the operating characteristic is the current in a power signal being provided to the pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.