Fan assembly
US4866320A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 26, 1988 |
| Grant date | Sep 12, 1989 |
| Priority date | — |
| Expiry date | Aug 26, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fan assembly that includes an impeller driven by an electric motor. The housing for the impeller has an air intake opening and a pressure-side connection for the discharge of air, with the pressure-side connection being provided with an air inlet opening that communicates with an air conduit that in turn leads to the electric motor housing. Air that flows through the air conduit is supplied at least to the region of the commutator of the electric motor. The electric motor housing is provided with an air outlet opening for receiving air that has been supplied to the electric motor housing via the air conduit, with this air outlet opening being in flow communication with an underpressure region of the impeller remote from the pressure-side connection of the impeller housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.