Compact miniature fan
US4164690A · kind A · utility
Inventors
Key dates
| Filing date | Apr 26, 1977 |
| Grant date | Aug 14, 1979 |
| Priority date | — |
| Expiry date | Apr 26, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K29/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A compact miniature fan has an air-guidance housing of rectangular parallelepiped configuration. The housing has two opposite end walls and side walls. One end wall is provided with an air inflow opening. One side wall is provided with an air outflow opening. The other end wall comprises a base plate. Mounted within the housing is an electric motor of flat overall shape. The stator and rotor of the motor define a planar air gap. The stator includes a magnetically conductive flux-return structure mounted on the base plate and a stator winding comprised of a plurality of flat coils mounted on the flux-return structure. The rotation axis of the rotor extends in the direction from one to the other of the end walls of the air-guidance housing. A radial fan wheel is provided within the housing, mounted on and coaxial with the rotor of the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.