Ducted fan, multicopter, vertical take-off and landing aircraft, CPU-cooling fan, and radiator-cooling fan
US11913470B2 · kind B2 · utility
0Cited by
11References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 29, 2018 |
| Grant date | Feb 27, 2024 |
| Priority date | — |
| Expiry date | Jun 21, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64U10/13
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
[Object] To maximize static thrust of a ducted fan. [Solving Means] This ducted fan 1 includes a duct 10, a fan 20, a motor 30, a housing 40, and stators 50. The fan 20 includes a hub 21 disposed concentric with the duct 10 and four blades 22 arranged at equal intervals on the outer circumference of the hub 21. A chord length CL of the blade 22 gradually decreases toward a tip 22A from the root. In contrast, the chord length CL of the blade 22 increases to the tip 21B from a tip vicinity portion 22B.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.