Cooling fan
US6488485B1 · kind B1 · utility
6Cited by
7References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1999 |
| Grant date | Dec 3, 2002 |
| Priority date | — |
| Expiry date | Dec 28, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/668
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Cooling fan with a fan wheel equipped with blades and an electric motor that has a stator and a rotor that is supported in a rotationally fixed manner on a driven shaft. For a purpose of a cost-saving and compact design of the cooling fan with low fan noise, the rotor is embodied as an external rotor with a bell-shaped pole housing encompassing the stator. The fan wheel is rotationally fixed in relation to the pole housing so that the fan wheel axially encompasses the pole housing at least partially and contacts the outer circumference of the pole housing at a number of points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.