Axial-flow fan with by-pass pipe or pipes
US3951566A · kind A · utility
22Cited by
7References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1974 |
| Grant date | Apr 20, 1976 |
| Priority date | — |
| Expiry date | Dec 11, 1994 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05B2260/962
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a method of widening the zone of stable operation of an axial-flow fan, and of attenuating noise generated thereby, a portion of the flow medium is drawn off upstream of the fan and is returned to a zone at the periphery of the fan rotor. The invention also includes an axial-flow fan for carrying out the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.