Thrower type rotary snowplough - has upward and outward adjustable propellers covering dead zone above ejector wheels

摘要

Two or more ejector wheels revolve round axes at the same height, in the direction of travel of the snowplough, with advance-cutting propellers on the extended shafts, and additional ones above the wheels. Two upper advance-cutting propellers (6) are adjustable upwards, and simultaneously outwards, from a basic position where they virtually cover the top dead triangular zone between the ejector wheels (2). These propellers may be fitted to swivel together, with bearing housings (8) containing drive chains (13).