Helicopter rotors
US4466775A · kind A · utility
10Cited by
4References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 9, 1982 |
| Grant date | Aug 21, 1984 |
| Priority date | — |
| Expiry date | Nov 9, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C27/50
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A helicopter rotor having a rotor hub and a plurality of rotor blades includes for each blade a blade fold mechanism comprising a reversible rotary power source and a rack and pinion mechanism adapted to operate one or more lock pins and to fold the blades between an operational spread position and a folded position. Two embodiments of the invention are described and illustrated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.