Thrust-ring and rotor fan system
US10605257B2 · kind B2 · utility
0Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2016 |
| Grant date | Mar 31, 2020 |
| Priority date | — |
| Expiry date | Dec 7, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2250/44
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fan system includes a rotor having plurality of blades and a ring airfoil, the plurality of blades being rotatably joined to a hub and the ring airfoil. The fan system may include a second contra-rotationally disposed rotor having a plurality of blades and a ring airfoil. The first and second ring airfoils having a cambered shape and an angle of attack between about −5 degrees and about 45 degrees, more preferably between about 5 degrees and about 30 degrees. Optionally, an outlet guide vane may be mounted rearward of the one or more rotors having a ring airfoil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.