Layup of tail rotor drive shaft tubes
US12140182B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2019 |
| Grant date | Nov 12, 2024 |
| Priority date | — |
| Expiry date | Jun 20, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2361/65
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A composite shaft has a fiber orientation that is a combination of fibers perpendicular to each other and a longitudinal axis of the shaft; and a second composite layer disposed at an angle ranging between 25 to 45 degrees+/−3 degrees from the fibers in the first composite layer; a third composite layer disposed at an angle ranging between 7 to 13 degrees+/−3 degrees from the fibers in the second composite layer and each subsequent transition layer(s); a fourth composite layer disposed at an angle ranging between 25 to 45 degrees+/−3 degrees from the fibers in the third composite layer(s); and a fifth composite generally perpendicular +/−3 degrees to each other and the fibers in the fourth composite layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.