Small fan
US5217351A · kind A · utility
11Cited by
11References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1991 |
| Grant date | Jun 8, 1993 |
| Priority date | — |
| Expiry date | Apr 19, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/325
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The small fan has an air conduction housing (2) of plastic, in which an impeller (1) is rotatably supported. It is designed as a meridian-accelerated fan. The blades (1a) of the impeller (1) are not twisted and have the same angle of pitch over the entire blade length. The leading edges of the impeller (1b) and the front side of the hub (1c) as well as the front side of the housing (2d) lie approximately in the same plane. In contrast to axial fans, the meridian-accelerated fan has a higher power density along with a lower noise development.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.