Patent ID: 8172251

Claim:
Ski or snowboard in the form of a board-type gliding device, comprising at least one top belt for imparting strength, at least one bottom belt for imparting strength and at least one core disposed in between, a top layer constituting the top face of the gliding device and a running surface constituting the bottom face of the gliding device, and, by reference to the width of the gliding device, at least one recess is provided in its middle portion extending in its depth direction from the top face of the gliding device in the direction towards the running surface and disposed in its longitudinal direction essentially parallel with the longitudinal direction of the gliding device with a view to causing a cross sectional weakening and reducing the stiffness of the gliding device transversely to its longitudinal direction, being provided with means for producing a cross-sectional shape or contour of the gliding device which is variable depending on load and/or manually variable, wherein at least one manually adjustable adjusting means is provided, which is designed on the one hand to act as a spreading means for producing an individually pre-adjustable increase in the width of the recess and on the other hand to act as a pulling means for producing an individually pre-adjustable reduction in the width of the recess, and the adjusting means selectively acts as an active spreading means or an active pulling means between the portions of the gliding device lying to the left and right of the recess depending on its individually selectable setting and wherein the at least one manually adjustable adjusting means, which is made of one piece and is moveable along the longitudinal axis of the gliding device, has at least two support or guide surfaces extending obliquely with respect to the longitudinal axis and perpendicular with respect to the running surface of the gliding device, which support surfaces cooperate with thrust surfaces on the top face of the gliding device or with longitudinal side walls of the groove-type recess so that when the adjusting means is shifted along the longitudinal axis, the support surfaces slide along the thrust surfaces or the longitudinal side walls and the recess is spread and pulled, respectively.