Propeller fan
US5603607A · kind A · utility
40Cited by
4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1995 |
| Grant date | Feb 18, 1997 |
| Priority date | — |
| Expiry date | Nov 8, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2240/304
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a propeller fan having a blade trailing edge of a sawtooth shape, in which the flows on the negative pressure side and the pressure side of a blade join gradually, so that the velocity loss is decreased in the vicinity of the trailing edge. As a result, the velocity gradient decreases and the generation of turbulence is reduced as compared with the conventional propeller fan, so that the noise is reduced and the fan efficiency is enhanced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.