| 摘要 |
The present invention is a road grader attachment that attaches to a bulldozer. The attachment has an elongated blade with mutually parallel side members attached to the lateral ends of the blade where each of the side members comprise a pair of spaced apart walls that house a plate movable in an up and down direction within the side member. Each of the movable plates is attached at its lower edge to a ground contacting skid. A hydraulic piston interconnects each side member with its respective interior plate for moving the plate up and down within the side housing member in order to raise or lower the skid that is attached to the movable plate
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