| 摘要 |
<p>The invention relates to a roller ski which is employed amongst other things for training in classic cross-country skiing during the summer. The object of this roller ski is to achieve a pressure-dependent grip when a kick is generated, with the result that more pressure on the ski from the foot provides better grip. This is in order to simulate skiing on snow, where in classic style pressure has to be placed on the ski during the kick in order to obtain grip on the middle of the ski. The invention is based on a common principle. Roller systems with free roll both forwards and backwards are combined with roller systems with one-way roll, in such a manner that when the pressure on the roller ski from the skier increases, the roller system(s) with one-way roll will be activated to an increasing extent as the pressure on the ski increases, with the result that the ski obtains grip thereby enabling a kick to be generated. The grip is obtained without any risk of the ski jerking in the event of unexpected pressure from a rough surface. Without extra pressure the roller ski will be liable to back-sliding just like a classic cross-country ski with grip wax under the middle and glide wax at the front and rear.</p> |
