Cooling fan
US7600980B2 · kind B2 · utility
2Cited by
6References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 18, 2005 |
| Grant date | Oct 13, 2009 |
| Priority date | — |
| Expiry date | Nov 18, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/386
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A cooling fan has a metal spacer, a boss made of Nylon integrally formed with the spacer by an insert molding and seven blades extending outward therefrom. A skew angle of about 30 degrees is provided at a connecting portion or a base end portion of the blade to the boss so as to be inclined backward in relation to a rotating direction of the cooling fan. To the contrary, a skew angle of about 8 degrees is provided at a portion extending from the connecting portion to the leading end of the blade so as to be inclined forward in relation to the rotating direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.