| 摘要 |
A narrow vent for aerating windshields of tractors, work machines, etc. The vent has a plurality of fins that spread the air stream that is directed onto a window in a fan-like manner. A portion of the fins, as side fins, are directed onto a region adjacent the vent, and the other portion of the fins, as main fins, are directed onto a region just ahead of the vent, with the angle provided by the fins corresponding approximately to a quarter circle. The air-exit plane provided by the vent extends at most insignificantly beyond the vehicle body part in which the vent is installed. All of the fins are partially recessed in the vent. The side fins are longer, and the outermost side fin is considerably longer, than the main fins. The outermost side fin is provided with a guide surface that faces the air-supply side extends at an obtuse angle relative to the air-exit plane, with the projection of this guide surface onto the air-exit plane representing an overproportionate part of the total surface area of this guide surface.
|
