Method for manufacturing a variable-pitch composite blade for a helicopter rotor
US6056838A · kind A · utility
21Cited by
20References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1998 |
| Grant date | May 2, 2000 |
| Priority date | — |
| Expiry date | Dec 8, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C2027/4736
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The method comprises the following steps: producing a preform of the blade comprising a blade root section for connection to a hub and an aerodynamically profiled main blade section, the blade root section of the preform including at least one cylindrical portion for guidance in terms of incidence; arranging a respective peripheral metal ring around each cylindrical portion for guidance in terms of incidence of the preform; arranging the preform provided with each peripheral metal ring in an injection mould; injecting a thermosetting liquid resin into the mould; and heating the mould to make the thermosetting resin set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.