Cooling fan impeller
US8152474B2 · kind B2 · utility
1Cited by
3References
17Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Apr 3, 2009 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Jul 21, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An impeller of a centrifugal fan includes a hub and a plurality of blades arranged on and around the hub. Each of the blades includes a root portion and a tip portion. The tip portion of each of the blades has a concave surface and a convex surface in rear and front sides thereof respectively. In a rotational direction of the impeller, the tip portion of a rear blade protrudes towards a front blade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.