Boots – shoes – and leggings – Boots and shoes – Occupational or athletic shoe
Reexamination Certificate
2000-01-24
2001-06-19
Kavanaugh, Ted (Department: 3728)
Boots, shoes, and leggings
Boots and shoes
Occupational or athletic shoe
C036S117200, C036S118200
Reexamination Certificate
active
06247252
ABSTRACT:
The present invention refers to a ski boot, in particular for telemark skiing.
BACKGROUND OF THE INVENTION
As is known the telemark technique requires the use of ski boots which are flexible in the area of the metatarsus, since the curves are made in a “free” heel fashion, in other words with the heel raised from the ski rather than rigidly fixed to the ski fastening as in the conventional skiing technique.
Traditional telemark ski boots are made of leather, which makes it possible to obtain the necessary flexibility. In recent years the use of new generation telemark ski boots, made of plastic material, has become steadily more common, offering improved aesthetics with respect to the leather boots and greater strength and duration.
In order to allow flexibility in the area of the metatarsus, plastic boots generally have a flexible wall portion in this area. The flexibility is attained by a particular geometric configuration of the wall portion, typically corrugation or undulation, or by making this wall portion of the boot of a more flexible material with respect to the remainder of the boot. The use of plastic materials with different mechanical characteristics, in order to create parts of the boot with differing flexibility, is made possible by overinjection or co-injection.
The use of an increased flexibility area however could compromise the rigidity of the ski boot, in particular in torsion, and therefore diminish control of the skis and as a result performance and safety.
SUMMARY OF THE INVENTION
The aim of the present invention is to create a ski boot of plastic material, in particular for telemark skiing, which has good characteristics of torsional rigidity without penalising the flexibility in the area of the metatarsus.
The above mentioned aim is reached by a ski boot, in particular for telemark skiing, of the type including a shell of plastic material and a sole, said shell having lateral walls and a flexible portion extending transversely to said shell in the metatarsus area from one side to the other of said sole, characterised by including a pair of stiffening elements which extend along the respective said lateral walls of said shell between an intermediate portion of said sole and a rear area of said shell.
REFERENCES:
patent: 3972134 (1976-08-01), Kastinger
patent: 4505056 (1985-03-01), Beneteau
patent: 4677769 (1987-07-01), Ahmad et al.
patent: 5031341 (1991-07-01), Paris et al.
patent: 5446976 (1995-09-01), Donnadieu et al.
patent: 5499461 (1996-03-01), Danezin et al.
patent: 5664344 (1997-09-01), Marmonier
patent: 5675917 (1997-10-01), Falguere et al.
patent: 5884420 (1999-03-01), Donnadieu
patent: 6012237 (2000-01-01), Okajima et al.
patent: 6076285 (2000-06-01), Caeran et al.
Calzaturificio S.C.A.R.P.A. S.p.A.
Kavanaugh Ted
Ladas and Parry
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