Machines powered by internal combustion engines
US5438965A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1994 |
| Grant date | Aug 8, 1995 |
| Priority date | — |
| Expiry date | Jan 19, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/28
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention concerns an arrangement relating to a cutting machine, a circular saw machine, a chain saw machine or the like, which is powered by an internal combustion engine. The machine comprises a working unit and a power unit, the power unit comprising at least a pre-filter and a main filter for intake air, and a motor cylinder. The pre-filter and the main filter are provided in a closed pre-filter chamber and in a closed main filter chamber, respectively, the pre-filter chamber forming a top portion of the power unit extending substantially over the entire length and substantially over the entire width of the power unit. The main filter chamber is located under the pre-filter chamber. A closed hood space is provided between the upper side of the pre-filter body and the inside of the roof of a filter cover, and a passage extends from the closed hood space at the side of or through the pre-filter chamber and the pre-filter body, down to the main filter chamber located under the pre-filter chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.