Ski with tri-dimensional ski surface

Abstract

A ski for mounting a binding on the ski's surface approximately in the middle of the ski or slightly behind the middle, where the ski is provided with inwardly curved edge portions, the ski having greater width at the transition to the front tip than in the middle, and the ski has an upwardly curved front tip. The ski combines features from skis with a very special and characteristic three-dimensional geometry in the actual sliding surface, and a special design of the tip (possibly also in a rear tip where this is relevant), where the tip's secondary sole surfaces ( 3, 4 ) are twisted upwards relative to a central reference surface ( 1, 2 ), with the result that the ski's tip succeeds in pressing more snow under the ski when running in loose snow and slush, and the invention thereby provides a ski which both glides better in loose snow as well as retaining all the favourable dynamic properties which exist in the described three-dimensional design of the actual sliding surface on the ski.

1 . A ski for mounting a binding on the ski's surface approximately in the middle of the ski or slightly behind the middle, where the ski is provided with inwardly curved edge portions, the ski having greater width at the transition to the front tip than in the middle, with an upwardly curved front tip, and possibly a full tip or a rather more modest tip or no tip at the rear end, where the ski has a three-dimensional sliding surface divided into a primary sole surface and secondary sole surfaces which from the bindings towards the transition to the tip have a substantially increasing uplift measured in steel edges relative to the plane defined by the primary sole surface when it is pressed down against the ground, i.e. when the ski is lying flat and without camber in the longitudinal direction, and then this geometry in the sliding surface is combined with a design of the tip, wherein the tip comprises a primary sole surface and secondary sole surfaces-which secondary sole surfaces, when viewed in cross section, provide steel edges with further accelerated raising relative to the primary sole surface from the transition between the sliding surface and the tip and further forward in the tip up to a cross section B. 
     
     
         2 . A ski according to  claim 1 , wherein the sliding surface of the ski has a three-dimensional sliding surface which is tripartite in some portions, with a right secondary sole surface, a central primary sole surface and a left secondary sole surface towards the transition to the tip, where there are secondary sole surfaces in the sliding surface over a length, which together, at both ends of the ski, forms at least 10% of the sliding surface's total length, and the part with raised secondary sole surfaces in front of the binding preferably forms at least 10% of the total length of the sliding surface. 
     
     
         3 . A ski according to  claim 1 , wherein the steel edges, when viewed in cross section, create an increasing uplift relative to the central sole surface from the transition between the secondary sliding surface and the tip's secondary sole surface to the cross section B located in front of D, where the uplift in cross section B, measured in mm, is at least 15% greater than in transition, preferably at least 30% and most preferred at least 50%. 
     
     
         4 . A ski according to  claim 1 , wherein the steel edges, when viewed in cross section, create an increasing uplift relative to the central sole surface from the transition between central sliding surface and the tip's central sole surface to a cross section B located in front of the transition, where the uplift in cross section B, measured in mm, is greater than in the transition, preferably at least 10% and most preferred at least 20%. 
     
     
         5 . A ski according to  claim 1 , wherein the tip's secondary sole surfaces, when viewed in cross section, create an increasing angle with primary sole surface from the transition between the sliding surface and tip and at any rate several cm outwards in the tip, with the result that the angle increases at least 1 degree and preferably at least 2 degrees from the transition to the tip, until maximum angle is achieved further forward in the tip. 
     
     
         6 . A ski according to  claim 1 , wherein the tip's secondary sole surfaces start further in towards the ski's bindings than the transition between the central primary sole surface and the tip's primary sole surface does, with the result that the accelerated upward raising in the steel edge already starts a few cm earlier than the upward raising to the tip from the central primary sole surface in transition, so that this transition to accelerated raising of the secondary sole surfaces starts at D. 
     
     
         7 . A ski according to  claim 1 , wherein the further from the transition the transition is located in the direction of transition, the more the accelerated raising in the steel edge increase from transition to cross section B relative to the increase from the transition to the transition, when cross section B is located in front of transition. 
     
     
         8 . A ski according to  claim 1 , wherein some of the transitions between the different areas on the ski are not perpendicular to the ski's longitudinal direction, nor are they located symmetrically about the longitudinal axis. 
     
     
         9 . A ski according to  claim 1 , wherein the ski is symmetrical about a longitudinal axis. 
     
     
         10 . A ski according to  claim 1 , wherein the ski is asymmetrical about a longitudinal axis.