Method for manufacturing a variable-pitch composite blade for a helicopter rotor
US6035531A · kind A · utility
7Cited by
18References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1996 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Oct 29, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49336
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The method includes the following steps: producing a preform of the blade comprising a blade root section for connecting to a hub and an aerodynamically profiled main blade section, the preform including, in the blade root section, a pile of fabrics transverse to the span axis of the blade projecting with respect to the blade root section, so as to form a pitch control lever; arranging the preform in an injection mold; injecting a thermosetting liquid resin into the mold; and heating the mould to make the thermosetting resin set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.