Noise reduction diffuser for an electric blower
US10184490B2 · kind B2 · utility
0Cited by
3References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2016 |
| Grant date | Jan 22, 2019 |
| Priority date | — |
| Expiry date | Jan 8, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/542
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A noise reduction diffuser for an electric blower has a motor holder and a rear cover fitted to the motor holder. The motor holder includes a sidewall and a bottom portion at one end of the sidewall. The other end of the sidewall has an opening for mounting an electric motor inside the sidewall. An output shaft of the motor extends through the bottom portion for driving a fan. The motor holder and the rear cover form a Helmholtz resonance cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.