Axial flow ring fan with fall off
US4915588A · kind A · utility
26Cited by
11References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1989 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Jun 8, 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 and projecting this geometry throughout the blade by imparting fall off to each blade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.