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Title:
SKIING BOOT AND SAFETY BINDING ASSEMBLY FOR ALPINE SKIING
Document Type and Number:
WIPO Patent Application WO/2001/097931
Kind Code:
A1
Abstract:
Skiing boot and safety binding assembly for alpine skiing that consists of a safety binding (1) fixed to a ski (2) and of a clamping element (3) mounted on or in the sole (A) of the skiing boot. It is new and characteristic for this assembly that the safety binding (1) consists of a double-unit base, whose front unit (4) is designed for fixed mounting on the ski (2), while the rear unit (5) is not fixed to the ski (2) and is guided in the front unit (4) so as to allow a limited shifting in the axis of the ski, while the clamping element (3) is located on or in the sole (A) on the virtual axis of the skier's leg.

Inventors:
Gladek, Janez (Wylstrasse 7 Hergiswil, CH-6052, CH)
&Zcaron AKELJ, Oton (Breznica 8 4226 &Zcaron iri, SI)
Jurca, Aleš (Logaška c. 45 4226 &Zcaron iri, SI)
Application Number:
PCT/SI2001/000019
Publication Date:
December 27, 2001
Filing Date:
June 19, 2001
Export Citation:
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Assignee:
ALPINA, TOVARNA OBUTVE, D.D., &Zcaron IRI (ul. Strojarska 2 4226 &Zcaron iri, SI)
Gladek, Janez (Wylstrasse 7 Hergiswil, CH-6052, CH)
&Zcaron AKELJ, Oton (Breznica 8 4226 &Zcaron iri, SI)
Jurca, Aleš (Logaška c. 45 4226 &Zcaron iri, SI)
International Classes:
A63C9/00; A43B5/00; (IPC1-7): A63C9/00
Foreign References:
US3860253A
DE2543145A1
US2576639A
US5207447A
Other References:
None
Attorney, Agent or Firm:
Patentna Pisarna D. O. O. (Copova 14 POB 101 Ljubljana, 725 10, SI)
Download PDF:
Claims:
Claims
1. A skiing boot and safety binding assembly for alpine skiing that consists of a safety binding (1) fixed to a ski (2) and of a clamping element (3) mounted on or in the sole (A) of a skiing boot, characterized in that the safety binding (1) consists of a double unit base, whose front unit (4) is designed for fixed mounting to the ski (2), while its rear unit (5) is not fixed to the ski (2) and is guided in the front unit (4) so as to allow a limited shifting in the axis of the ski, while the clamping element (3) is located on or in the sole (A) in the virtual axis of the skier's leg.
2. The assembly according to claim 1, characterized in that the front unit (4) bears, on the same axle (6), two turnable parts (7) foreseen for gripping the clamping element (3), while the rear unit (5) bears an element (8) with a semicircular conical clamping rear surface (9) in grip with a complementary rear part of the clamping element (3).
3. The assembly according to claims 1 and 2, characterized in that the front unit (4) and the element (8) of the rear unit (5) are interconnected in such way that a horseshoeshaped part (8') of the element (8) of the rear unit (5) partially laterally embraces the front unit (4) so as to be guided in the axial sense of the ski, whereat two protrusions (10) on the horseshoeshaped part (8') fit into longer recesses (11) on the front unit (4), thereby determining the axial shifting in the recesses (11) and, consequently, the axial shifting of the whole rear unit (5) with respect to the front unit (4).
4. The assembly according to claims 1 to 3, characterized in that the two parts (7) turnably fitting into the front unit (4) are interconnected with a spring (12).
5. The assembly according to claims 1 to 4, characterized in that the rear unit (5) is prolonged backwards behind the skiing boot, where there is located a bed (13) for a tightening element (14) fitting into the bed (13) via levers (15) that allow a manual lifting and simultaneous shifting backwards of the tightening element (14) due to the release of the manually adjustable spring (15) therein, whereat the tightening element (14) iswith its lever (16), which with respect to the housing (17) of the tightening element (14) fits into the spring (15) adjustably tightened by a screw (18)connected via an oblong strip (19) through the two turnable parts (7) with its triangular pointed front end (20).
6. The assembly according to claims 1 to 5, characterized in that the strip (19) fits into a groove (21) cut both in the front unit (4) and in the rear unit (5).
7. The assembly according to claims 1 to 6, characterized in that, above the strip (19), the rear unit (5) is provided with a bridge (22) bearing the said element (8) with the semicircular conical surface (9) fitting into the complementary rear part of the clamping element (3).
8. The assembly according to claims 1 to 7, characterized in that in the front unit (4), below the strip (19), there is executed an axially flexibly supported notched pin (23) fitting into an oblong hole (24) in the strip (19), the wall of the hole (24) being notched so as to fit the pin (23).
9. The assembly according to claims 1 to 8, characterized in that at their front the two turnable parts (7) are provided with two teeth (25) extending forwards and upwards, the front sides of the parts (7) below the teeth (25) being provided with two positioning protrusions (26), whereat the turnable parts (7) are covered by a plate (27) where the front of the skiing boot rests.
10. The assembly according to claims 1 to 9, characterized in that the clamping element (3) built into the sole (A) of the skiing boot is constructed as an oblong plate, which in its front part, on the fitting side of the safety binding (1), has a protruding part (28) with an archshaped surface (29) on the innner side, whereat the surface (29) continues into a bottom surface (30) of the clamping element (3) through an arch shaped groove (31), whereat the surface (29) is provided with two recesses (32) and the archshaped surface (29), the two recesses (32) thereon and the groove (31) are shaped in a complementary way with respect to the front part of the teeth (25) and to the positioning protrusions (26) of the turnable parts (7) in such a way that both teeth (25) grip into the groove (31) and the two protrusions (26) grip into the recesses (32).
11. The assembly according to claims 1 to 10, characterized in that, on its rear part, the clamping element (3) is, on the fitting side of the safety binding (1), provided with a protruding part (33), whose internal surface (34) is conical, concave, archshaped and complementary to the surface (9) of the element (8) of the safety binding (1).
Description:
SKIING BOOT AND SAFETY BINDING ASSEMBLY FOR ALPINE SKIING Object of Invention The invention relates to a skiing boot and safety binding assembly for alpine skiing.

Technical Problem The technical problem solved by the present invention is how to design a skiing boot and safety binding assembly for alpine skiing that will eliminate the problem of matching the size of the skiing boot and the respective safety binding, in particular with rented skis, without spoiling the skiing characteristics of the ski as foreseen by the ski manufacturer, and with reducing the torsional strain in the skier's leg in case of a fall, whereat the new shape of the skiing boot will again allow the manufacture of a walking-friendly shoe without a stiff sole and provided with a softer instep part of the skiing boot shell.

Prior Art As a rule, hitherto known skiing boot and safety binding assemblies have been constructed in such a way that the safety binding holds the skiing boot simultaneously clamped at the front (toes) and at the back (heel), The shape and the size of the attachments on the skiing boot is standardized in order to provide for compatibility of skiing boots and safety bindings by different manufacturers.

As the skiing boot is clamped at the tip and at the heel, the safety binding is always adjusted to the size of the skiing boot. Since the daily rental of skis and skiing boots is increasing, there has developed a growing need for such a skiing boot and safety binding assembly that will allow and provide for the fitting of the assembly or of the safety binding to the size of the skiing boot without any adaptation whatsoever. Only in this way a rent-a-ski can offer an independent selection of skis and skiing boots.

Wi-th the known solutions of the safety binding and the skiing boot, each time the space between the front unit and the rear unit has to be adjusted to the length of the skiing boot, which takes some time and at the same time makes the service more expensive. Although there exist safety bindings for fast adjustment, manual setting in each particular case cannot be avoided.

Further, all hitherto known safety binding constructions have a negative effect on the characteristics of the ski. Since the skiing boot has to be stiffly clamped in the front of the toes and behind the heel, the safety binding must be stiffly fixed to the base. If the safety binding is fixed directly to the ski, such stiff fixing of the binding affects the flexibility of the central part of the ski by deforming the continuous arch of the ski resulting from its response to the manner of skiing and to the ground. Since it is impossible to avoid the deforming curving of the ski in the area of the safety binding, the safety binding structure must contain elements compensating the moving of the safety binding with respect to the sole of the skiing boot due to the flexibility of the ski. Actually, the force of clamping the skiing boot into the safety binding must be adjustable in a narrow tolerance range in order to secure the release of the skiing boot when the set load is exceeded in different directions with respect to the skiing boot.

These requirements, however, result in a more complicated structure of the safety binding, which in turn involves a higher price and a higher probability of a defect or unsatisfactory operation.

In order to avoid some of the above deficiencies, there have been developed intermediate elements between the ski and the safety binding. Such an intermediate element is flexibly mounted on the ski in order to provide for its smooth functioning.

The safety binding is stiffly mounted on the intermediate element, which guarantees a correct and steady clamping force acting on the skiiing boot. Side effects of this solution are an increased weight of the ski as well as a higher price.

However, the space between the front and the rear units remains to be adjusted to the size of the skiing boot on a case to case basis.

It is also well-known that, because of the rigidity of the sole due to the front and back clamping, skiing boots are not comfortable for walking. Yet walking in skiing boots, at least at short distances, cannot be avoided.

Therefore the need has arisen for more comfortable skiing boots that are better suitable for walking, although they possess all those characteristics that are required for skiing.

Solution to the Technical Problem The above-described technical problem has been solved by a new skiing boot and safety binding assembly for alpine skiing according to the invention. Its essential feature is that, in the virtual axis of the skier's leg, the skiing boot sole carries or contains a relatively short element gripping into the space between the front and the rear units of the binding according to the invention, whereat the size of the element in the skiing boot as well as of the space in the binding is constant i. e. independent of the size of the skiing boot, while the binding is constructed as a safety binding meeting the regulations and standards on safety bindings. Due to the identical dimensions of the clamping element in the skiing boot irrespective of the size of the latter, all skiing boots containing this element can be clamped into any ski without a previous adjustment of the space between the front and the rear units of the binding.

Since the clamping element in the sole of the skiing boot is relatively short and it is the only part gripping into the binding on the ski, the remaining part of the sole, i. e. the instep part, may be freely designed so as to allow more comfortable walking.

The clamping element in the skiing boot is provided, on the side of the heel, with an element with a concave conical semicircular gripping surface lying on its bottom side, with the centre located approximately in the axis of the skier's leg, while the front unit is provided with an arch-shaped element, whose centre coincides with the centre of the said opposite concave conical semicircular clamping surface and which contains at least one, preferably two recesses with an additional groove between this surface and the lower surface of the clamping element.

The complementary safety binding is fixed to the ski at a single point so as not to affect the characteristics of the ski. The safety binding consists of two axailly shiftable units, the front unit being fixed to the ski in a comparatively small area so as not to affect the characteristics of the ski. The rear unit is clamped into the front unit so as to allow axial shifting, while in other directions it moves along guides executed in the front unit. The rear unit contains a convex semicircular conical surface fitting to the concave conical surface on the clamping part in the sole of the boot, while the front unit consists of two turnable parts with notched front surfaces that fit into the groove at the front of the safety binding element in the sole of the skiing boot and are positioned, along with the whole skiing boot, with respect to the safety binding and the ski by means of at least one protrusion and the complementary recess located on the adjacent surfaces of the skiing boot element and at the same time on the notched arch- shaped surface of at least one turnable part. Both turnable parts on the front unit of the safety binding and the rear unit with the arch-shaped surface are provided with adjustable springs in the base of the safety binding, so that at exceeding the set value depending on the anticipated maximum permissible force on the skier's leg in any direction, the spring allows a momentary release of the skiing boot from the safety binding. The safety binding is also provided with a lever for a possible manual release of the skiing boot.

In the continuation the invention will be described in more detail on the basis of an example of embodiment and the attached drawings, wherein Fig. 1 shows an exploded perspective view of the assembly according to the invention, Fig. 2 shows a longitudinal axial section of the assembly according to the invention.

The skiing boot and safety binding assembly for alpine skiing according to the invention consists of a safety binding 1 mounted on a ski 2 and of a clamping element 3 on the sole A of a skiing boot.

The safety binding 1 consists of a double-unit base. A front unit 4 of the base is designed for fixed mounting on the ski 2, while a rear unit 5 is not fixed to the ski 2 and is guided in the front unit 4 so as to allow a limited shifting in the axis of the ski.

In the front unit 4 two turnable parts 7 foreseen for gripping the element 3 on the skiing boot sole A are mounted on the same axle 6. The rear unit 5 bears an element 8 with a semicircular conical clamping rear surface 9 in grip with the complementary rear part of the clamping element 3. The front unit 4 and the element 8 of the rear unit 5 are interconnected in such a way that a horseshoe-shaped part 8'of the element 8 of the rear unit 5 partially laterally embraces the front unit 4 so as to be guided in the axial sense of the ski, whereat two protrusions 10 on the horseshoe-shaped part 8'fit into longer recesses 11 on the front unit 4, thereby determining the axial shifting in the recesses 11 and, consequently, the axial shifting of the whole rear unit 5 with regard to the front unit 4.

The two parts 7 turnably fitting into the front unit 4 are interconnected with a spring 12 that holds them apart so that they are ready to accept the element 3 and the skiing boot.

The rear unit 5 is prolonged backwards behind the skiing boot where there is located a bed 13 for a tightening element 14 fitting into the bed 13 via levers 15 that allow a manual lifting and a simultaneous shifting backwards of the tightening element 14 due to the release of a manually adjustable spring 15 therein.

The tightening element 14 is-with its lever 16, which with respect to the housing 17 of the tightening element fits into the spring 15 adjustably tightened by a screw 18- connected via an oblong strip 19 through the two turnable parts 7 with its triangular pointed front end 20. The strip 19 fits into a groove 21 cut both in the front unit 4 and in the rear unit 5.

Above the strip 19, the rear unit 5 is provided with a bridge 22 bearing the said element 8 with the semicircular conical surface 9 fitting into the complementary rear part of the clamping element 3 in the sole A of the skiing boot.

In the front unit 4, below the strip 19, there is executed an axially flexibly supported notched pin 23 fitting into an oblong hole 24 in the strip 19, the wall of the hole 24 being notched so as to fit the pin 23.

At their front the two turnable parts 7 are provided with two teeth 25 extending forwards and upwards, the front sides of the parts 7 below the teeth 25 being provided with two positioning protrusions 26.

The turnable parts 7 are covered by a plate 27 where the front of the skiing boot rests.

The safety binding may also be provided with an integrated ski brake that may also be added as a separate unit. The ski brake is not shown in the drawings.

The clamping element 3 built into the sole A of the skiing boot is constructed as an oblong plate, which in its front part, on the fitting side of the safety binding 1, has a protruding part 28 with an arch-shaped surface 29 on the inner side, whereat the surface 29 continues into a bottom surface 30 of the clamping element 3 through an arch-shaped groove 31. The surface 29 is provided with two recesses 32. The arch- shaped surface 29, the two recesses 32 thereon and the groove 31 are shaped in a complementary way with respect to the front part of the teeth 25 and to the positioning protrusions 26 of the turnable parts 7 in such a way that both teeth 25 grip into the groove 31 and the two protrusions 26 grip into the recesses 32.

On its rear part the clamping element 3 is, on the fitting side of the safety binding 1, provided with a protruding part 33, whose inner surface 34 is conical, concave, arch- shaped and complementary to the surface 9 of the element 8 of the safety binding 1.

The clamping element 3 in the sole is constructed in such a way as not to hinder at walking. Due to the comparatively small length of the clamping element 3 in the sole, the whole instep part of the skiing boot is not burdened with clamping forces and can be flexible. Only the cuff and the part of the shell where these two parts are connected must be so stiff as to provide support for the ankle. As a result, the skiing boot is softer in its instep section, which makes walking easier, while the stiffness of the skiing boot in the ankle preserves the boot characteristics necessary for skiing.

The clamping of the skiing boot into the safety binding is made in the following way: the spring 15 in the tightening element 14 is released by a manual lifting of the latter, whereby it moves backwards. The pin 23 supported by a spring with its wider part snaps into the oblong hole 24 in the strip 19 and fixes the strip in its rear position, whereby, due to the spring 12, the two turnable parts 7 assume a reciprocally fitting position. Thereafter the tightening element 10 is tightened again by being pushed downwards. In practice, this phase was already completed at the previous release of the skiing boot. With the heel part of the skiing boot the slanting conical surface 9 on the safety binding 1 is approached on condition that the tightening element 10 has already been tightened manually. The heel parts are in their rear position because the strip 19 is fixed in its extreme position tightened by the pin 23. Thereafter the toe part of the skiing boot sole is fitted to the safety binding 1 so that the protruding part 28 of the clamping element 3 grips the two turnable parts 7 of the safety binding. At the same time the sole A of the skiing boot pushes the pin 23 into its lower position, whereby the latter releases the strip 19 that, due to the tightened spring, moves forwards, separates the two turnable parts 7 that with their teeth 25 grip into the groove 31 of the clamping element 3, and the two protrusions 26 are positioned in the recesses 32 of the clamping element 3. As soon as the strip 19 separates the two turnable parts 7 and they grip into the clamping element 3, the force of the spring 15 pushes the whole rear unit 5 backwards and creates a resilient contact between the clamping element 3 and the safety binding 1. In case of an excessive load on the skiing boot, with respect to the standards, the spring gets released in order to separate first the front unit or the rear one, depending on the sense of operation of the external force.