Land vehicles – Skates – Shoe attaching means
Patent
1997-11-17
2000-05-23
Camby, Richard M.
Land vehicles
Skates
Shoe attaching means
280613, 361171, A63C 920
Patent
active
060657693
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to the field of boots intended for participation in gliding sports such as cross-country skiing, ice-skating or roller-skating, snowboarding, etc. It relates more specifically to the boots which are to interact with the gliding member proper by means of a metal pin located under the sole of the boot. It more specifically takes advantage of the means of fixing this pin to the boot. In the remainder of the description, attention will more particularly be devoted to the use of the invention in cross-country skiing, but it must be kept in mind that a person skilled in the art will be readily able to transpose it to other sports such as skating or boarding.
PRIOR ART
As is known, a cross-country ski boot is composed of an upper intended to cover the foot and of a sole connected to the binding and/or the top face of the ski.
Near the front end, the sole has a transverse pin intended to be caught by the binding secured to the ski. It is becoming increasingly common for high-performance boots to have one or more longitudinal grooves under the sole. These grooves interact with complementary ridges on the ski or, more generally, on the binding. In general, the main groove is deeper at the front of the sole in order to house the binding pin. The latter connects between the two vertical sides of the groove.
As is known, this pin extends deeply into the sole to give an effective anchor. This is necessary because during jolts and when the ski is flying, the pin is subjected to high stresses and needs to be firmly attached to the sole in order to prevent it from pulling out.
To improve the anchorage, it has been proposed for the extensions of the pin to be connected to a metal plate embedded in the material of the sole when it is being manufactured by moulding, towards the rear of the boot.
Quite clearly, moulding the sole requires particular precautions and special tooling to allow the sole to be moulded encompassing the two ends of the transverse pin, while leaving this pin visible. Unfortunately, even though these special procedures are compatible with overmoulding the sole directly to the upper, they require very expensive so-called "slide" moulds because of the undercut formed by the transverse pin. Soles obtained independently are therefore bonded to the upper afterwards. It then follows that the cost price of a boot of this type is still high because sophisticated moulding machines and a significant amount of labour must be used.
The same drawbacks inherent in the moulding of the sole are observed, for example, with snowboarding boots or skates.
SUMMARY OF THE INVENTION
The object of the invention is to provide a design of that region of the boot that has the metal pin which allows easy moulding, avoiding the use of special tooling while at the same time retaining a high anchorage capability.
Thus, the boot in accordance with the invention is of the type comprising a sole the underside of which has a recess delimited by two more or less vertical walls pointing towards the bottom of the boot, the said recess having passing through it a pin which is intended to interact with means for attaching to the gliding member and comprising a rigid piece embedded in the sole and having two extensions extending into the said walls and intended to accommodate the said pin.
This boot is characterized in that the extensions and the ends of the pin have means intended to make this pin removable.
In other words, the metal pin is removable and is secured to the boot for example by being screwed to a piece embedded within the sole. This embedded piece constitutes the anchoring points for the pin.
The invention therefore consists in using an anchoring piece and a pin which are separate, the anchoring piece being at least partially embedded during the moulding of the sole so that it does not form any undercut.
In this way, the moulding tools are simple, and this in particular allows the sole to be moulded directly on the upper.
In a first embodiment, the embedded rigid piece is a U-shaped st
REFERENCES:
patent: 4907353 (1990-03-01), Wittman et al.
patent: 4930233 (1990-06-01), Provence
Condini Alessandro
Simonetti Luigi
Camby Richard M.
Skis Rossignol SA
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