Noise reduction in aircraft propellers
US5190441A · kind A · utility
84Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1990 |
| Grant date | Mar 2, 1993 |
| Priority date | — |
| Expiry date | Aug 13, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The invention concerns reduction of tip vortices in aircraft propellers, wherein a fence having anhedral or dihedral is attached to the blades of the propeller. Another form of the invention is applicable to counterrotating propeller systems, wherein a fence is attached to the blades of the forward propeller of the system, and no fences are attached to the aft propeller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.