Manufacturing methods of net stiffeners
US12384122B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2023 |
| Grant date | Aug 12, 2025 |
| Priority date | — |
| Expiry date | Aug 4, 2043 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C2001/0072
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Method to make a T shaped stiffener form from a stiffener preform (100) having a foot (130) configured to be in contact with an aircraft panel, and a sole (120) with an edge (120a). The manufacturing method includes: obtaining laminates (110a, 110b) formed of layers of composite material, folding the laminates (110a, 110b) to be L shaped in cross section, joining the laminates to form a T shaped preform (100), molding the edge of the sole (120a) so that the edge is semicircular in cross section, applying to the edge (120a) a strip of semi-cured carbon fabric (L1) and a fresh strip of prepreg fiberglass (L2), and curing the preform (100) to obtain the stiffener.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.