Boots – shoes – and leggings – Boots and shoes – Occupational or athletic shoe
Patent
1988-01-05
1989-10-10
Chi, James K.
Boots, shoes, and leggings
Boots and shoes
Occupational or athletic shoe
280615, A43B 504, A63C 900
Patent
active
048722723
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention concerns a device to detachably fasten a ski boot to a ski binding fixable to a ski.
It has long been known already from Norwegian Patent No. 138,832 to provide the front ski boot end with a hook element to achieve detachable fastening to a ski binding. Furthermore, a cast attachment of a hook element into a plastic sole is known from German Auslegeschrift No. 26 22 966.
A ski binding of the above cited type illustratively is disclosed in German Offenlegungsschrift No. 30 02 874. In this known device, the hook element, when seen in topview (FIG. 4 of this document), assumes the approximate shape of a square ring, the free wire segments of each leg being bent toward each other and made to align. Even though this known solution has been found useful in practice, there are signs nevertheless that the stated shape of the hook element is not the most appropriate for all conceivable link mechanisms. Also, the annular shape of the hook element precludes further developments even where called for on practical grounds.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to so design and shape a device of the initially cited kind that shall allow further developments without thereby abandoning the concept of fastening the ski boot to the ski binding. Moreover, diverse sptial arrangements shall be made possible and there shall be adaptability to various material links.
Because the bent free wire segments of each leg are bent once more toward the cross rod, the hook element of the subject invention enjoys a hook-like support inside the front of the ski boot as seen in the direction of the load, whereby even adverse, unilateral stresses, which are known from experience to be commonplace when the ski boot is used in motion, can be better absorbed by the ski boot than in the solution of the state of the art.
Seen in the direction of the load, the change in direction of adjoining wire segments also provides a hook-like rest for the hook element at the fore of the ski boot. Furthermore, the hook element is made stiffer because its individual legs are braced.
The features of the subject invention achieve improved force spreading because the hook element is supported over the entire space of the front of the ski boot.
The features of the subject invention also achieve a hook element geometry matching the outer shape of the front of the ski boot. Thereby, the side surfaces of the ski boot are reinforced.
The features of the subject invention further allow intensive reaction to the load in that the wire segments in the longitudinal direction of the ski boot of the individual legs are divided into sub-segments pointing in different directions.
The features of the subject invention also relate to assuring natural rolling-off motion of the ski boot to correspond to the natural motion of the skier's foot. These features take into account the foot's roll-off motion taking place over the area of the big toes.
The features of the subject invention achieving reinforcement at the fore of the ski boot take this concept of the invention further.
Further features, advantages and details of the invention shall now be described more closely in relation to the drawings showing several embodiments of the subject invention.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGS. 1 through 3 show a first embodiment with inwardly doubly bent free wire segments of the individual legs of the hook element, FIG. 1 showing the hook element in topview for the ON position in a ski boot, while FIGS. 2 and 3 are a topview and an elevation view of the hook element, respectively.
FIGS. 4 through 6 illustrate a further design mode of the first embodiment, having individual-leg wire segments additionally bent out of the plane of the hook element, similarly to FIGS. 1 through 3;
FIGS. 7 through 9 illustrate a third embodiment of the subject invention wherein the legs of the hook element are shown angled several times corresponding to the outer shape of the front of the ski boot and have outwardly ben
REFERENCES:
patent: 1621076 (1927-03-01), Lotz
patent: 4309833 (1982-01-01), Salomon
patent: 4334367 (1982-06-01), Salomon
patent: 4553771 (1985-11-01), Bernard et al.
Erdei Roland
Szasz Tibor
Wittmann Heinz
Chi James K.
TMC Corporation
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