Rotorcraft with electrically driven blade control
US8235324B1 · kind B1 · utility
23Cited by
1References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2010 |
| Grant date | Aug 7, 2012 |
| Priority date | — |
| Expiry date | Dec 29, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C27/68
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A helicopter uses multiple redundant harmonic drive motors on the rotor head to actuate the angle of attack of rotor blades at the rotor blade roots, providing collective control that, in combination with a system for providing cyclic control on the rotor blades, eliminates the need for a swashplate, thereby advantageously reducing the weight and maintenance cost of the helicopter, increasing its reliability, and reducing its vulnerability to ballistic attack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.