Axial flow ring fan
US4900229A · kind A · utility
12Cited by
10References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 1989 |
| Grant date | Feb 13, 1990 |
| Priority date | — |
| Expiry date | May 30, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/386
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An axial flow ring fan has improved efficiency and reduced noise by making the leading edge of each blade a generally sinusoidal shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.