Snow or soil grader

Details Snow or soil grader Snow or soil grader

E - Fixed Constructions

02

F

E02F 3/76 (2006.01) E01H 4/02 (2006.01) E01H 5/06 (2006.01)

Patent

CA 2346574

A grader vehicle has a vehicle body mounted on two drive tracks. A boom is mounted on the front of the vehicle and extends to the front of the body. A third drive track is mounted on the leading end of the boom by a steering mechanism for rotation about an upright steering axis. The three tracks are driven by separate hydraulic motors. The use of a steering, driven track on the boom provides a tractive force pulling the vehicle forwards in the desired direction of travel and positively driving the leading end of the boom in the direction of a turn. The track also provides a degree of packing at the centre of the vehicle's path that can not be achieved with a ski gliding on the surface. This is of particular importance when packing ski trails with the vehicle. For grading purposes, the vehicle has a grader blade across the front of the vehicle and a second blade leading the front track. This provides both grading and packing at the centre of the track where prior art tracked vehicles would at most provide a grading action with a scraper blade.

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