Fan with magnetic blades
US6194798A · kind A · utility
56Cited by
21References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 14, 1998 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Oct 14, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/327
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A DC driven fan with blades made of magnetized material and permanently magnetized in the radial direction and cooperating with a plurality of electromagnetic stator coils mounted external to the outer fan edges. Adjacent blades have alternate N-S, S-N radial magnetic orientations. In one embodiment, the blades are mounted in a non-ferrous hub and in an alternate embodiment they are mounted in a ferrous hub so that adjacent blades function like a U or V-shaped magnet. Blades can be made of magnetized ferrous, ferromagnetic, or magnetized plastic depending upon the application and blade strength specifications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.