Land vehicles – Skates – Runner type
Patent
1995-10-26
2000-05-16
Culbreth, Eric
Land vehicles
Skates
Runner type
A63C 5048
Patent
active
060625856
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a ski comprising a basic core with a running surface comprising longitudinal edges, the bottom side of the longitudinal edges essentially consisting of inelastic external edges and a recess provided in the lengthwise direction of the ski between the external edge and the running surface.
2. Related Art
German utility model DE-GM 87 05 677 discloses a snow-sliding board consisting of a core with a profiled lower face. This profiled lower face comprises a flat area serving as a running surface. Longitudinal elastic, winged edges are provided laterally adjacent to this face. The area serving as the running surface covers about 30 percent of the cross-section, the remaining 70 percent being covered by the longituidinal edges. This snow-sliding board is designed as a snowboard which moreover comprises an extremely narrow running surface and widely salient edges which are elastically deformable to assist in turning. Even though these edges offer advantages when used as snowboards, they are unsuitable for skis such as monoskis, downhill skis, cross-country skis and even for snowboards with a running surface extending over the whole width.
German utility model DE-GM 88 06 015 discloses a slalomtype downhill ski with steel edges and recesses provided between the external edges and the running surface. External edges of this type are inelastic and are, therefore suited for this kind of skis. However, since these external edges are only provided at the midsection of the ski, they will not contribute to the longitudinal stability of the ski. Moreover, these external edges are located at the level of the contact or running surface of the ski with a consequence that the edges are permanently in action and the ski will be difficult to maneuver because the edges will continuously cut into the snow. This feature while it might be of advantage for slalom skiing, does not, however, not meet the requirements of an allround ski.
SUMMARY OF THE INVENTION
It is, therefore, an object of the present invention, to provide a ski which, while not essentially differing in appearance from a conventional ski, allows for a good grip and improved stability, and is easy to handle. In addition, the gripping power of the edges should not only remain effective for a short time after grinding, but should be retained over a long period of time.
In the present invention, this problem is solved by the feature that the external edge is installed at an angle of more than 0 degrees in relation to the running surface and that the external edges extend over the whole running surface of the ski.
Since the ski according to the present invention features external edges extending over the whole length of the ski, the latter will offer an essentially improved directional stability and longitudinal guidance at not only its midsection, which, as a rule, is fitted with a binding, but also the tip and the tail of the ski are fitted with the external edge. A further advantage of the present invention is to be seen in the fact that the external edge of the ski is installed at a distance from the running surface so that the external edge is not permanently engaged. This advantage can already be attained by inclining the edge with a slight angle towards the running surface, for instance by only one or two degrees, in this manner increasing the distance between the external edge and the ground by one to two millimeters. Since the external edges are, in addition, inelastic, their geometry will not change when the edge is subjected to a load, which essentially improves directional stability.
If the edge wears as a result of grinding, the gripping power of the ski will be retained, even if the edge has become relatively blunt because the hooked form of the external edge remains intact. As to its running features, this particular ski configuration does not differ from conventional skis.
The external edge is preferably located at a rail. In the case of a conventional manufacturing
REFERENCES:
patent: 3758127 (1973-09-01), Doyle et al.
patent: 3871671 (1975-03-01), Bildner
patent: 4147377 (1979-04-01), Plenk
patent: 5083810 (1992-01-01), Minidis
Culbreth Eric
Vincent Paul
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