The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 03, 1992
Filed:
May. 15, 1989
Bernhard Mayr, Hard, AT;
Head Sportgeraete Gesellschaft m.b.H. & Co. OHG, Kennelbach, AT;
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.