Controlled noise portable power unit for operating a tool
US5857439A · kind A · utility
15Cited by
1References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 1997 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | May 22, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L9/0081
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A portable power unit for operating a tool is provided and includes a frame adapted to be carried on the back of an operator to orient the power unit in a the predetermined operating position with the operator standing upright. The power unit further includes an engine mounted on the frame for powering a tool, a fan mounted between the frame and the engine, a fan intake positioned between the frame and the fan, and structure for attenuating engine and fan generated noise and for inhibiting the emanation of engine and fan generated noise in horizontal directions from the power unit with the power unit in the operating position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.