Cooling-air blower having a combustion-air channel which taps a component air flow from a cooling-air channel
US5269265A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1993 |
| Grant date | Dec 14, 1993 |
| Priority date | — |
| Expiry date | Feb 8, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2075/027
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention is directed to a cooling-air blower for an internal combustion engine including a two-stroke engine of a portable handheld work apparatus. Cooling air is guided by a cooling-air channel to an internal combustion engine and a combustion-air channel conducts air to the intake pipe of the engine. A portion of the cooling-air flow is tapped at the pressure end of the blower. A segment of the combustion-air channel is disposed next to the cooling-air channel. A profile hollow body having a streamlined configuration extends from this segment of the combustion-air channel into the cooling-air channel. The profile hollow body is aligned at its location in the cooling-air channel with the flow direction of the cooling-air flow and has a rear end facing away from this flow. An inlet opening is provided in this rear end of the hollow body for receiving a portion of the cooling-air flow which is then passed to the combustion-air channel through the hollow body. The streamline configuration and location of the inlet opening permit a large quantity of air to be tapped without disturbing the cooling-air flow and without taking along dirt particles entrained in the cooling-air flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.