Aerial propellers more especially for aircraft propulsive units
US4790725A · kind A · utility
7Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1987 |
| Grant date | Dec 13, 1988 |
| Priority date | — |
| Expiry date | Oct 7, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S416/02
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The invention provides improvements to aerial propellers, particularly for aircraft propulsive units, wherein the cowling of the propeller is defined by a meridian line having: at its origin (B) a maximum curvature greater than 15; then a curvature decreasing rapidly from the maximum value to a value of 7; then a curvature decreasing linearly from the value 7 to a value of 0; than a curvature decreasing more slowly from the value 0 to a minimum value between -3 and -5; then a curvature increasing rapidly from the minimum value to a value of 0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.