Process for making a curved PI shaped preform made from woven composite materials
US7014805B1 · kind B1 · utility
10Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2004 |
| Grant date | Mar 21, 2006 |
| Priority date | — |
| Expiry date | Apr 25, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/0854
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention is a process for forming a 3D woven PI shaped cross-section preform having a first and second bottom foot portions and first and second upstanding leg portions for use in a structure having at least one curved portion of a specific length. In detail, the process includes the steps of: 1) cutting the treads parallel to the direction of curvature into over a length equal to the length, such that the cuts in each thread are spaced from the cuts in the adjacent treads; 2) stretching the portions of the preform requiring curvature; and 3) forming the curvature in the preform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.