Axial fan and noise abatement apparatus combination
US4475867A · kind A · utility
13Cited by
6References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 10, 1983 |
| Grant date | Oct 9, 1984 |
| Priority date | — |
| Expiry date | Jan 10, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/665
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An axial fan having a central fan structure from which a plurality of blades extend radially and a center body extending axially from said central fan structure. The center body occupies a volume in which turbulence would otherwise occur. At least one side branch resonator is disposed within the center body to attenuate resonance produced by said fan in a particular frequency band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.