Fan systems
US7781998B2 · kind B2 · utility
3Cited by
11References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2007 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Sep 24, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P80/10
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fan system comprising a first switch, a second switch, a coil, and a drive device. The drive device comprises a third switch and a fourth switch. The third switch, the fourth switch, the first switch, the second switch and the coil form a bridge connection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.