Blade made of thermoplastic composite, in particular for ducted tail rotor of a helicopter, and its method of manufacture
US5462408A · kind A · utility
47Cited by
11References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1993 |
| Grant date | Oct 31, 1995 |
| Priority date | — |
| Expiry date | Dec 14, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49337
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The blade has its lower-surface and upper-surface skins of its shell, its front and rear filling bodies and its spar made of a composite material having the same thermoplastic matrix, preferably made of PEEK, reinforced preferably with carbon fibres. The spar is extended outside the shell by an integrated rooting part with linkage attachment, in a loop or laminate, in the same thermoplastic composite. The method consists in assembling, by melting, under pressure, all the thermoplastic composite components of the blade, in a single step after manufacturing these components in the form of prefabricated elementary pieces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.