Abstract: A multi-layered ski includes an upper strap disposed over at least a part of the length of the ski, a core, and a running surface, with the core disposed between the upper strap and the running surface. The upper strap is constructed so as to attenuate low frequency vibrations, without reduction in the torsional stiffness of the ski, thereby enhancing the running properties of the ski. The upper strap includes a top layer, and a layer of damping material (e.g. an elastomeric synthetic plastic having a modulus of elasticity of about 10.sup.7 -10.sup.10 Pa, and a dissipation factor tan .delta. greater than 0.8). The damping layer is just below the top layer. At least one lower laminating layer is also provided, below the damping layer. At least one slot is formed in the top layer transverse to the dimension of elongation of the ski and separating portions of the top layer from each other in the dimension of elongation. The lower laminating layer overlaps the slots in the dimension of elongation.

Abstract: The invention comprises a ski having at least one lower cover, at least one upper cover, a core disposed between the upper cover and the lower cover, the core including recessed grooves in a side thereof proximate the upper cover and strip-shaped receiving parts disposed in the grooves. The receiving parts include at least two layers, one of the two layers including metal, and the other of the at least two layers including an elastomeric material, and spacer sleeves extending through the elastomeric material layer and including distal ends which extend beyond the upper cover. The distal ends are for bearing a base plate thereon and the spacer sleeves are for receiving fastening screws to connect the base plate with the receiving parts.

Abstract: A ski comprises a running surface, a top surface and side surfaces extending between the running surface and the top surface. A core is defined by the running surface, the top surface and the side surfaces. Angled profiles are formed inside the core. Each angled profile includes a base and two legs extending from the longitudinal ends of the base. At least two of the angled profiles are at least partially enclosed in each other in overlapping relationship such that the height of one of the inner legs of each of the overlapping angled profiles is decreased by an amount corresponding to the height of the base.