Land vehicles – Skates – Runner type
Patent
1995-12-20
1998-08-04
Johnson, Brian L.
Land vehicles
Skates
Runner type
280610, A63C 504
Patent
active
057882592
DESCRIPTION:
BRIEF SUMMARY
The disclosed invention is a ski with a body consisting of several elements that are arranged beside and/or on top of the other. The elements are connected by adhesives and/or form-fit into each other. The ski consists of a minimum of two elements that are arranged one on top of the other and extend over almost the total length of the ski body. One of these two shaped parts has a longitudinal cavity in which a longitudinal rib of the other element engages.
BACKGROUND OF THE INVENTION
A ski of the type described above is known from DE-OS 23 32 909 and DE-OS 34 27 111. The skis described in these patents consist of several layers and elements of different materials. These layers and elements are combined with the goal to arrange them in such a way that they will absorb the bending and torsion loads that occur when the ski is used and give the ski the respective degree of stiffness and elasticity required by the user. The mutually interlocking elements are connected with a strong glue joint.
DE-OS 38 03 535 describes a ski with a body that contains a core extending over practically the total length of the ski. This core is surrounded by a box designed to offer resistance to the various occurring mechanical forces. The box has an upper and a lower resistance lamella which are mutually connected by means of two lateral resistance walls. The core in the middle of the box can consist of different materials such as wood, synthetic foam or other materials of cellular structure. However, it can also be partly hollow, which means that it can consist, for example, of metal or plastic tubes. The deformation properties and the running characteristics of this well-known ski are mainly due to the shape of the box and the deformation resistance ensured by the resistance lamellas and resistance walls.
DE-OS 24 33 673 describes a ski with a longitudinal core of hollow, tube-shaped elements. The core furthermore contains ribs that connect the elements and keep the tube-shaped elements parallel and at a fixed distance. The result are longitudinal grooves between the tube-shaped elements. These grooves are filled with a filling material. The running surface of the ski consists of a level lower plate that is glued to the bottom surface of the core. The core consists preferably of two identical corrugated plates arranged symmetrically one on top of the other. The surfaces where the two elements meet are glued together. The compromise between ski stiffness and ski elasticity can be modified by changing the thickness of the adhesive.
EP-A-00 81 834 describes another ski with a box. Surrounded by the box, the core of the ski contains two parallel longitudinal plastic tubes that are increasingly flattened towards their ends. A metal plate mounted above the tubes holds the binding. The core surrounding the tubes consists of a cellular expanded plastic such as polyurethane foam that is shaped around the tubes.
A technique used for the production of metal skis is described in DE-OS 15 78 700. The upper part of the metal ski is provided with a plastic vibration reduction covering. The edges of the vibration reduction covering are glued to the top layer of the ski.
SUMMARY OF THE INVENTION
A connection or sealing strip of elastic foam material carrying a layer of adhesive can be used to glue the vibration reduction covering to the ski.
The proposed invention is intended to create a ski of the type described by way of introduction that is characterized by good torsion resistance and bending elasticity and guarantees even running and good absorption of vibrations.
These requirements are met by combining at least two shaped elements that extend over most over the length of the ski body one on top of the other. One of the elements has a longitudinal groove in which the longitudinal rib of the other element engages. The space between the two elements is filled with a layer of elastomer material that is connected with the elements by means of a shear force transmitting medium.
The characteristics of the proposed ski are mainly due to the
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patent: 3416810 (1968-12-01), Kennedy, III
patent: 3493240 (1970-02-01), Jenks
patent: 3612556 (1971-10-01), Seawell
patent: 3894745 (1975-07-01), Heim et al.
patent: 3928106 (1975-12-01), Molnar
patent: 5141243 (1992-08-01), Meatto
patent: 5299822 (1994-04-01), Mayr et al.
patent: 5449425 (1995-09-01), Renard et al.
Avery Bridget
Emig Uwe
Gramlich Markus
Johnson Brian L.
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