| 摘要 |
The present invention relates to a prior application U.S. Ser. No. 11/705,116 <<ANTI-ZIGZAG GUIDE RAIL FOR SNOWMOBILE SKI>> wherein a flat rectangular extension ( 122 ) is added to protect from wear the skittle of a snowmobile ski when crossing rocky paths. The flat extension is used as floating link between the guide and the tail ( 131 ) of a wear runner laid out longitudinally of the ski. The guide ( 120 ) located at the front of the ski is always engaged, along with the self-sharpening runner, in ice, while the extension ( 122 ) keeps the back of the ski flat. The extension may be of a reversed U-shape comprising an extra web ( 135 ) and two extra cutting wings ( 136 ) protruding from the web ( 135 ) to a certain depth in direction of the ground and longitudinally of the extension, thus defining five cutting trails.
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