Cooling fan noise reduction apparatus, systems, and methods
US7300244B2 · kind B2 · utility
9Cited by
3References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2005 |
| Grant date | Nov 27, 2007 |
| Priority date | — |
| Expiry date | Nov 22, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S416/50
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Apparatus, systems, and methods may operate to distribute acoustic spectral energy associated with a primary blade-passing frequency tonal component of fan noise and with harmonics thereof. The energy may be spectrally distributed by irregularly spacing a plurality of fan blades or stationary structures associated with the fan, or both. The stationary structures may be capable of being pressure-coupled to each one of the plurality of fan blades as each fan blade passes by each one of the stationary structures. Other embodiments are described and claimed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.