Land vehicles – Skates – Shoe attaching means
Patent
1986-03-18
1988-09-06
Love, John J.
Land vehicles
Skates
Shoe attaching means
A63C 918
Patent
active
047688041
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device for attaching a boot to a ski, especially a cross-country racing ski or a cross-country touring ski, comprising locking means provided on the ski for co-operating with portions of the user's footwear for the attachment thereof to the ski.
The object of the present invention is to provide such a device, which fulfils the following requirements:
1. Good and safe side guidance when used during cross-country racing and cross-country touring.
2. Free and unobstructed lifting movement relative to the ski with a lifting movement which can be limited correctly upwardly.
3. A ski boot which has a more correct orthopedic structure than boots having extended sole tips.
4. A ski binding and a footwear which both have a low and compact construction.
5. A ski boot which can be used not only for cross-country racing and touring, but also as a usual hiking footwear having a sole adapted to the natural shape of the foot.
These requirements are fulfilled by a ski boot attachment device constructed according to the present invention. The present invention is characterized in that the locking means, which are provided on the ski, co-operate with attachment portions provided in the sole surface of the footwear in the area of the toe portion of the foot.
In a simple embodiment for achieving a best possible side guidance the sole portion of the footwear in the area of the toe portion of the foot can be structured as one or more channels, the channels gripping over a corresponding guiding- and locking rail provided on the foot plate of the ski binding. If only one transversely extending channel is used, it is possible in practice to achieve a 60 to 65 mm wide support of the boot on the ski.
The footwear or boot is attached to the guiding rail or locking means by forming the guiding rail such that it in a first position allows for insertion of the guiding rail in the transversely extending channel in the boot sole below the toe tip, whereas it in another position, the locking position, keeps the footwear sole secured to the guiding and locking rail. The type of support thereby achieved will render a far safer side guidance than what is achieved in connection with bindings in which the sole, which is often heavily bent, is to be supported against the ears or toe irons of the binding.
The requirement of a free and unobstructed lifting movement of the foot is fully met in that the supporting or hinge device according to the invention functions as a bearing. Besides, the device renders it possible to have full control of the degree of freeness, for example by means of an adjustable spring loaded abutment.
The clamping means, which keeps the sole down towards the locking rail, can also be so constructed so that the clamping point can be adjusted. Thus, if the clamping point is displaced to a sole area which comes into effect "behind" the guiding rail, there is achieved a "firm" binding which can be appropriate in loose snow or in downhill skiing. If the clamping point is set right above the guiding rail, there is achieved a so to say unloaded or free hinge effect. A prerequisite for this unloaded hinge effect is that the sole tip which is located ahead of the support, does not lock the swinging movement, a fact which involves that the tip portion should be provided with a progressively arched shape upwardly and forwardly, or that the transversely extending channel renders such a soft sole portion that a free and unrestricted lifting movement is achieved, which is correctly limited upwardly.
The device according to the invention allows for an orthopedic boot, and it can have the shape of an ordinary walking-tour boot having a sole adapted to the natural shape of the foot. This involves that the boot can also be used for usual hiking, at the same time as the boot can be given a natural, low and compact structure.
From DE Auslegeschrift No. 26 22 966 there is known a cross-country skiing boot having an extension of the boot sole arranged ahead of the boot. It is true that in this extension there a
REFERENCES:
patent: 2516238 (1950-07-01), Mortsell
patent: 2610067 (1952-09-01), Harby, Jr.
Love John J.
Mar Michael
WITCO A/S
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