Boots – shoes – and leggings – Boots and shoes – Occupational or athletic shoe
Patent
1988-07-13
1990-03-13
Kee Chi, James
Boots, shoes, and leggings
Boots and shoes
Occupational or athletic shoe
280615, A43B 504, A63C 900
Patent
active
049073532
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a cross-country ski boot.
2. Description of the Related Art
A cross-country ski boot is described, for example, in German Patent Specification 2,942,806. In this known cross-country ski boot, the supporting surface is located at the front end of the gliding sole. Furthermore, a retaining element bent from wire is anchored (injection-molded) directly in the gliding sole of the cross-country ski boot. Such an arrangement is used in the trade, but is practicable only when the material of the gliding sole has sufficient strength. However, a softer (more elastic) sole is often desired in cross-country ski boots for leisure skiers. Such a soft gliding sole does not have the necessary tearing strength for directly anchoring the hooking element.
It has therefore already been proposed (see German Offenlegungsschrift 3,334,144) to fasten the hooking element to a metal plate-shaped insert, and anchor (injection-mold) it in the gliding sole together with the hooking element. However, the disadvantage of this known solution is that the metal insert constitutes a foreign body in the plastic gliding sole. When the foot rolls, stresses may occur which can lead to the formation of splits and cracks especially at the edges of the insert. Moreover, in this known cross-country ski boot, the supporting surface interacting with the ski tie is also composed of the (soft) sole material, thus resulting in its premature wear.
It may be mentioned, merely for the sake of completeness, that, in current products, the part intended for engaging into the ski binding is itself composed of hard plastic and is injection-molded into the boot sole. However, this is a different type of cross-country ski boot, since there is no hooking element made of bent wire.
The object of the present invention is to avoid the disadvantages of the known cross-country ski boots and provide a cross-country ski boot in which the gliding sole is highly pliable, but the hooking element can nevertheless be anchored reliably in the gliding sole, without the rolling movement of the foot being impeded thereby. Furthermore, the portion carrying the hooking element will be connected permanently to the remaining portion of the gliding sole.
SUMMARY OF THE INVENTION
According to the invention, this object is achieved by a cross-country ski boot sole having a toe end and a heel end, the sole including a first section having a portion substantially disposed at the toe-end of the sole, the first section formed of hard plastic, a second section substantially formed of plastic material softer than the first section, a connecting portion for connecting the first section and the second section, a hook disposed in and extending from the toe end of the first section for engagement with the binding of a cross-country ski, and a support surface disposed on the periphery of the sole for interaction with a cross-country ski binding. As a result of this measure, it is possible to securely anchor a hooking element composed of multiply angled wire, even in a soft elastic gliding sole, without impairing the pliability of the gliding sole.
A long lifetime of the parts of the gliding sole which interact with the ski binding is achieved, in part, by means of the support surfaces disposed on either side of the hooking element.
The effective contact surface between the two portions of the gliding sole is increased as a result of the unique contact surfaces between the first and second sections of the sole.
Less resistance is opposed to a rolling movement of the cross-country boot, in part, by means of the tapered shape of the first section of the sole.
The extensions of the first section surrounding the second section make it possible to protect the gliding sole against premature wear on its periphery.
Finally, the webbing increases the stability of the gliding sole in the transverse direction, while retaining the longitudinal elasticity necessary for rolling.
Further advantages, features and details of the cro
REFERENCES:
patent: 4334367 (1982-06-01), Salomon
patent: 4382611 (1983-05-01), Salomon
Himmetsberger Alois
Luschnig Franz
Stanzl Robert
Stritzl Karl
Wittmann Heinz
Chi James Kee
TMC Corporation
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