Axial fan and method of manufacturing the same
US8740562B2 · kind B2 · utility
6Cited by
13References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2008 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | Oct 12, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/541
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fan includes sloping surfaces arranged at an inner peripheral surface of an air channel portion that are shaped such that an air passage is enlarged in a cross sectional area in a direction normal or substantially normal to a central axis. The inner peripheral surface of the air channel portion also includes a straight surface at which area the distance between the central axis and the inner peripheral surface of the air channel portion is substantially constant. Also, the straight surface of the air channel portion includes a plurality of slits each penetrating the air channel portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.