Patent ID: 7914013

Claim:
A snowboard for use on rails comprising a board having a length, a base, and a top surface on which two bindings are mounted at a distance apart approximately corresponding to around ⅓ of the board's length, where the board base has a first base surface disposed between a first transversal axis and a second transversal axis, the first base surface being is designed with inwardly curved edge portions, the board having a first end between the first transversal axis and a first upwardly curved tip, the board having a second end between the second transversal axis and a second upwardly curved tip, the board being wider at the first and second ends than the first base surface, wherein: a) more than 70% of the base is composed of a flat central portion between the first and second transversal axes and b) the base further includes secondary running surfaces from steel edges and inwards to form an angle with the first base surface, the secondary running surfaces being provided either along the entire length of the board or at any rate along the first and second ends of the snowboard, c) in an arbitrary cross section, where there are secondary running surfaces, the secondary running surfaces substantially extend 1-4 cm inwards from the steel edges, before the angle of the running surface changes d) the secondary running surfaces in the cross sections will form substantially straight lines, e) the secondary running surfaces are rigid and not in contact with the ground if the board is not being edged, f) the angle which the secondary running surfaces form with the first base surface is at least 1 degree wherein the angle, viewed in cross section, substantially increases from the first and second transversal axes to the first and second upwardly curved tips, and wherein g) the secondary running surfaces substantially twist up from the plane of the first base surface as the distance from a central transversal axis of the board increases.