Counter rotating fan design and variable blade row spacing optimization for low environmental impact
US8661781B2 · kind B2 · utility
10Cited by
11References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2009 |
| Grant date | Mar 4, 2014 |
| Priority date | — |
| Expiry date | Dec 9, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An air vehicle propulsion system incorporates an engine core with a power shaft to drive an outer blade row. The power shaft extends through and is supported by a counter rotation transmission unit which drives an inner blade row in counter rotational motion to the outer blade row. The counter rotation transmission unit exchanges power from the engine core with the shaft. An actuator engages the shaft for translation from a first retracted position to a second extended position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.