Hand-guided, portable tool with internal combustion engine
US5743240A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1997 |
| Grant date | Apr 28, 1998 |
| Priority date | — |
| Expiry date | Feb 7, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S261/68
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hand-guided, portable tool includes a housing and an internal combustion engine mounted in the housing. A fuel tank is mounted in the housing. The internal combustion engine has a carburetor with induction port for preparing a fuel/air mixture. An air filter is mounted in the housing. The air filter has a clean air side that is connected to the induction port. The internal combustion engine also has a control chamber with inlet valve. The control chamber is filled with fuel supplied thereto via the inlet valve from the fuel tank. The control chamber supplies fuel to the carburetor. The internal combustion engine has a compensation chamber delimited on one side by a control diaphragm that controls the inlet valve. The compensation line connects the compensation chamber to the clean air side of the air filter. The compensation line has a first connection section connected to the clean air side of the air filter and a second connection section connected to the compensation chamber. A pressure-equalization line for connecting the fuel tank to the clean air side of the air filter is provided, wherein the pressure-equalization line opens into the compensation line at a location between…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.