Propulsion device having unducted counter-rotating and coaxial rotors
US9593582B2 · kind B2 · utility
10Cited by
5References
5Claims
0Family size
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Key dates
| Filing date | Apr 13, 2012 |
| Grant date | Mar 14, 2017 |
| Priority date | — |
| Expiry date | Mar 30, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A propulsion device including an unducted upstream propeller and a counter-rotating and coaxial downstream propeller. At least one blade of the upstream propeller is configured to generate a corotating secondary vortex for acting upstream of the downstream propeller to destabilize a blade tip vortex of the same at least one blade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.