Air-blow working machine
US9206567B2 · kind B2 · utility
4Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2012 |
| Grant date | Dec 8, 2015 |
| Priority date | — |
| Expiry date | Aug 10, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01G20/47
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The air-blow working machine comprises a fan provided in a fan casing and a drive unit to drive the fan, and discharges an airflow generated by the rotating fan. The fan casing has an inner wall disposed between the fan and the drive unit. A smooth surface is formed on the face of the inner wall on the side of the fan. A first concavo-convex portion is formed on the face of the inner wall on the side of the drive unit. Thereby, a noise is reduced without an influence upon performance for blowing air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.