| 摘要 |
A ground traction device is disclosed which comprises ground engaging members including first and second parts, the parts being mounted for rotation on a fixed axis and being rotationally offset with respect to each other about the axis. The peripheral surface of each part includes three individual areas arranged in the form of an equilateral triangle with ends of adjacent areas being joined by lobe portions. The ground engaging portions are constructed of molded rubber and provide improved traction in soft ground. The properties of the rubber are selected in relation to the weight of a vehicle to be moved so that the ground engaging member rotates about a true rolling radius over hard ground.
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