Passively folding propeller blades for drag reduction
US10780974B2 · kind B2 · utility
0Cited by
9References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2018 |
| Grant date | Sep 22, 2020 |
| Priority date | — |
| Expiry date | Mar 21, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64U50/13
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A propulsion unit includes a motor rotor that spins about a central rotational axis, propeller blades each having a proximal base and a distal tip, and pivot mounts each coupling the proximal base of a corresponding one of the propeller blades to the motor rotor. The propeller blades each freely pivot at the proximal base about a corresponding offset pivoting axis that is substantially parallel to but offset from the central rotational axis of the motor rotor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.