Fan and impeller
US8202055B2 · kind B2 · utility
3Cited by
11References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2009 |
| Grant date | Jun 19, 2012 |
| Priority date | — |
| Expiry date | Feb 6, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/666
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fan includes a housing, an impeller and a motor. The impeller includes a hub, a ring and a plurality of flat blades. The ring surrounds the hub without substantial contact therewith and is connected to the hub by at least one connecting arm. The flat blades are disposed on the ring and the active surface of each flat blade has an imaginary extending lines which is which is tangent to a rim of the hub.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.