Blower having a sound-damping structure
US5110258A · kind A · utility
8Cited by
9References
7Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Aug 2, 1990 |
| Grant date | May 5, 1992 |
| Priority date | — |
| Expiry date | Aug 2, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/664
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A blower comprises an impeller which can function to raise the pressure of a fluid and delivers it; a driving device for driving the impeller; and a fan casing which includes a fluid path to inspire the fluid from the outside and deliver it to the outside through the impeller; wherein the fan casing is at least partly formed by a hard porous structural unit whose specific gravity is continuously changed in at least one of the direction of thickness and a direction of surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.