Variable pitch mechanisms for propeller blades using linear actuation
US10562608B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2017 |
| Grant date | Feb 18, 2020 |
| Priority date | — |
| Expiry date | Feb 8, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C11/32
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Various mechanisms for adjusting pitches of propeller blades are described. For example, the pitch adjustment mechanism may include a propeller hub enclosing a geared mechanism that cooperates with a compound gearbox having first and second planetary stages to adjust pitches of propeller blades. Alternatively, the pitch adjustment mechanism may include a propeller hub enclosing a pitch adjustment assembly that utilizes tension cables and torsion springs, or rack-and-pinion structures, to adjust pitches of propeller blades. Using any of the various mechanisms, the pitches of propeller blades may be rotated at least 90 degrees, and up to and exceeding 360 degrees, in order to effect thrust reversals and/or adjust thrust profiles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.