EP3335771A1

EP3335771A1 - Winter sports equipment comprising an equipment body and manufacturing method thereof

Info

Publication number: EP3335771A1
Application number: EP16425114.2A
Authority: EP
Inventors: Francesco Meneghello
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-12-19
Filing date: 2016-12-19
Publication date: 2018-06-20

Abstract

Ski (1) or snowboard (1) comprising an equipment body (3) having a main extension in a longitudinal direction (X-X), said equipment body (3) also extending in a transverse direction (Y-Y), orthogonal to the longitudinal direction (X-X); said equipment body further comprises an equipment body boundary (24) which defines opposite transverse boundary profiles(25, 26) which define the encumber in the transverse direction (Y-Y) of said equipment body (3); wherein said equipment body (3) comprises a base surface (5) suitable to slide and float on a penetrable medium (2), and an attachment portion (6), facing opposite to said base surface (5) and suitable to form at least one attachment site (7) to connect directly or indirectly to a user (8) of the equipment (1); and wherein said equipment body (3) comprises a front portion (9) and a rear portion (10), longitudinally opposite to said front portion (9) with respect to said attachment portion (6); and wherein said equipment body (3) comprises a core (23), said front portion (9) of said equipment body (3) comprising a front portion of the core (29); and wherein said front core portion (29) has a smaller transverse dimension to the distance between said opposite transverse boundary profiles (25, 26) of said front portion (9) of the equipment body (3). and wherein said equipment body (3) further comprises opposite lateral extensions (27, 28) which extend from said front core portion (29) to form said opposite transverse boundary profiles (25, 26), said opposite lateral extensions (27, 28) being more flexible than said front portion of core (29); and wherein said base surface (5) defines a transverse base profile (11); and wherein the transverse base profile (11) of said front portion (9) of the equipment body (3), is different from the transverse base profile (11) of said rear portion (10) of the equipment body (3) and wherein said transverse base profile (11) comprises a convex portion (12) which extends for a prevailing extension in the transverse direction (Y-Y) of the rear portion (9) of the equipment body (3).

Description

Scope of the invention

. The present invention relates to winter sports equipment as well as to an equipment body for winter sports equipment.
. Specifically, the present invention relates to winter sports equipment, for example such as a ski or a snowboard.
. The winter sports equipment according to the invention is particularly suitable, but not uniquely designed, for off-piste skiing.
. The present invention also relates to a manufacturing method of winter sports equipment.
. The equipment, as well as the equipment body, according to the invention may also be used for water skiing.

State of the art

. Alpine skis for on-piste skiing are generally known of comprising a substantially flat sliding surface, suitable for sliding on compact snow, and bordered by opposite sharp edges or blades, suitable to form the sliding surface when the user rolls, in other words tilts sideways, discharging his weight onto a edge of each ski. Typical piste skis are characterised by a certain flexural rigidity, they have a narrow and elongated shape and have a waisted profile, allowing the user to assume the typical bent forward posture that allows precise, elegant and relatively relaxing skiing, since steering the skis is not physically energy- consuming.
. For example, from the document US-4433855 is disclosed a solution of piste skis comprising rigid, pronounced and protruding edges which give the sliding surface of the ski a transversely concave profile in the front portion and doubly concave in the rear portion or tail of the ski, thanks to the provision of a third edge which extends centrally in the rear portion of the ski, suitable to further increase the penetration of the tip and tail of the ski in the hard-packed snow, giving increased adherence and the effect of allowing the user to turn rapidly. The provision of these three rigid, projecting, cantilevered, longitudinally directed edges makes it possible to cleanly trace on the piste while skiing three separate, substantially parallel grooves, resulting in satisfactory manoeuvring of the equipment on piste. The rigidity of the ski further requires that the concave front portion be placed near the front end of the equipment, greatly limiting the beneficial effects of this solution.
. An improved solution based on the same operating principle of the aforementioned document US-4433855 consists of the so-called "dovetail" ski, providing for a fork in the tail of the ski.
. Piste skis of the type described above are unsuitable for off-piste skiing, because the fresh snow has a soft or powder consistency and does not allow the ski edges to be exploited advantageously, which tend instead to penetrate into the fresh powder snow in an undesirable manner, resulting in poor handling of the equipment. In addition, the flexural rigidity of the skis described above is particularly disadvantageous for skiing on off-piste routes requiring the user to perform jumps. Off-piste skiing in fact requires use of a wider sliding surface of the ski in contact with the soft snow, since the weight of the user tends to determine the sinking into the soft snow of the equipment and at the same time requires the user to assume a posture or stance designed to keep the front tips of the ski raised from the soft snow surface to prevent the front tips of the skis from penetrating the soft snow, stopping the skiing, but this reduces the sliding surface of the ski, and results in a very strenuous skiing for the user. In addition, piste skis tend to sink into the soft snow with the risk of hitting, while skiing, obstacles covered by the blanket of fresh snow, such as boulders, stumps or roots.
. The known types of ski for skiing off-piste generally have a concave longitudinal profile also indicated with the term camber, with the central section raised in relation to the end portions, which gives some flexibility to the equipment, as shown for example in the document US-2014-0159344 . However, off-piste skis are unsuitable for skiing on piste because they involves too great an effort for the user and poor manoeuvrability, mainly due to the flexural elasticity of the equipment which makes the response of the ski edges, where present, unpredictable, resulting in reduced safety for the user and for other users of the piste.
. This type of skiing is similar to the construction principles of a snow board, which are generally characterised by a high degree of flexibility to allow the user who rests both feet, and thus his whole weight on a single equipment to counteract the elastic upward thrust caused by the longitudinally concave shape of the snowboard, thus increasing the surface area in contact with the snow. Generally snowboards perform well in soft snow, thanks to their extensive contact surface with the snow which guarantees a certain buoyancy, but in any case require the user to keep the front of the snowboard raised from the snow to avoid penetrating the soft snow. Snowboard solutions are shown, for example, in documents US-6352268 and WO-2007-094690 .
. Prior ski and snowboard solutions have a multilayer structure and comprise a core, usually made of wood, and a base made in one piece. Sometimes the core becomes thinner, to give flexibility, near the tip or tail of the ski or snowboard.
. The solutions mentioned so far, although advantageous in some respects, do not fully solve the problem.
. The need is therefore strongly felt to provide winter sports equipment, as well as an equipment body for winter sports equipment, particularly suitable for skiing off-piste on soft snow, and at the same time suitable for skiing on piste on compact hard-packed snow.
. The need is also strongly felt to provide winter sports equipment, as well as an equipment body for winter sports equipment, suitable for skiing on soft snow, which at the same time avoids excessive effort for the user of the equipment.
. The need is also felt to provide winter sports equipment, as well as an equipment body for winter sports equipment, which allows safe skiing and at the same time offers satisfactory manoeuvrability of the equipment.
. In addition, the need is felt to provide an equipment body for winter sports as well as winter sports equipment, with improved flexibility compared to the prior solutions, without thereby resulting in reduced mechanical and structural resistance.
. In addition, the need is felt to provide a production method of an equipment body comprising a flexible and at the same time resistant core.

Solution

. One purpose of the present invention is to overcome the drawbacks of the prior art mentioned so far and provide a solution to the needs spoken of with reference to the state of the art.
. One purpose of the present invention is to provide winter sports equipment, as well as an equipment body for winter sports, able to provide the user with a high level of versatility, while offering satisfactory manoeuvrability of the equipment and a good degree of safety in all conditions of use.
. A further purpose of the present invention is to provide an equipment solution for winter sports as well as an equipment body for winter sports equipment, which while being structurally resistant, provides improved flexibility compared to the prior solutions.
. A further particular purpose of the present invention is to provide a ski solution particularly but not univocally suited for skiing in fresh powder snow.
. A further particular purpose of the present invention is to provide a snowboard solution particularly but not univocally suited for skiing in fresh powder snow.
. A further particular purpose of the present invention is to provide a water skiing solution.
. A further particular purpose of the present invention is to provide a ski solution which allows a user to adopt a more aerodynamic stance than the prior solutions.
. A further particular purpose of the present invention is to provide a snowboard solution which allows a user to adopt a more aerodynamic stance than the prior solutions.
. A further particular purpose of the present invention is to provide a production method of an equipment body for winter sports comprising a core.
. These and other purposes are achieved by an equipment body according to claim 1, by equipment according to claim 12, and by a method according to claim 13.
. Some advantageous embodiments are the subject of dependent claims.
. According to one aspect of the invention, the winter sports equipment comprises an equipment body.
. According to one aspect of the invention, an equipment body of the winter sports equipment comprises a core.
. According to one aspect of the invention, a manufacturing method of winter sports equipment is provided.
. According to one aspect of the invention, a manufacturing method of a core for winter sports equipment is provided.
. According to one aspect of the invention, an equipment body for winter sports equipment has a main extension in a longitudinal direction, said equipment body also extending in a transverse or transversal direction, orthogonal to the longitudinal direction; said equipment body comprising an equipment body boundary which defines opposite transverse boundary profiles which define the encumber in the transverse direction of said equipment body; wherein said equipment body comprises a base surface and an attachment portion, opposite to said base surface; and wherein said equipment body comprises a front portion and a rear portion longitudinally opposite to said front portion with respect to said attachment portion; and wherein said equipment body comprises a core, said front portion of said equipment body comprising a front portion of core; and wherein said front portion of core has a smaller transverse dimension than the distance between said opposite transverse boundary profiles of said front portion of the equipment body; and wherein said equipment body further comprises opposite lateral extensions, or fins, extending from said front portion of core to form said opposite transverse boundary profiles, said opposite lateral extensions being more flexible than said front portion of core; and wherein said base surface defines a transverse base profile; and wherein the transverse base profile of said front portion of the equipment body is different from the transverse base profile of said rear portion of the equipment body; and wherein said transverse base profile comprises a concave portion; and wherein said concave portion extends for a prevailing portion of the front portion of the equipment body in transversal direction.
. According to one aspect of the invention, an equipment body for winter sports equipment has a main extension in a longitudinal direction, said equipment body also extending in a transverse direction, orthogonal to the longitudinal direction; wherein said equipment body comprises a base surface and an attachment portion, facing opposite to said base surface; and wherein said equipment body comprises a front portion and a rear portion longitudinally opposite to said front portion with respect to said attachment; and wherein said base surface defines a transverse base profile; and wherein the transverse base profile of said front portion of the equipment body is different from the transverse base profile of said rear portion of the equipment body; and wherein said transverse base profile comprises a concave portion, said concave portion extends for a prevailing portion of the front portion of the equipment body in transversal direction., and wherein said transverse base profile comprises a convex portion, said convex portion extends for a prevailing portion of the rear portion of the equipment body in transversal direction.
. According to one aspect of the invention, an equipment body for winter sports equipment has a main extension in a longitudinal direction, said equipment body also in a transverse direction, orthogonal to the longitudinal direction; wherein said equipment body comprises a base surface and an attachment portion, facing opposite to said base surface; and wherein said equipment body comprises a front portion and a rear portion longitudinally opposite to said front portion with respect to said attachment; and wherein said base surface defines a transverse base profile; and wherein the transverse base profile of said front portion of the equipment body is different from the transverse base profile of said rear portion of the equipment body; and wherein the transverse base profile comprises a concave portion, said concave portion extends for a prevailing portion of the front portion of the equipment body in transversal direction.; and wherein said rear portion of the equipment body comprises a substantially flat transverse base profile.
. According to one aspect of the invention, an equipment body for winter sports equipment has a main extension in a longitudinal direction, said equipment body also extending in a transverse direction, orthogonal to the longitudinal direction; wherein said equipment body comprises a base surface and an attachment portion, facing opposite to said base surface; and wherein said equipment body comprises a front portion and a rear portion longitudinally opposite to said front portion with respect to said attachment; and wherein said base surface defines a transverse base profile; and wherein the transverse base profile of said front portion of the equipment body is different from the transverse base profile of said rear portion of the equipment body; and wherein said front portion of the equipment body comprises a substantially flat transverse base profile, and wherein the transverse base profile comprises a convex portion, said convex portion extends for a prevailing portion of the front portion of the equipment body in transversal direction.,
. According to one aspect of the invention, said equipment is a ski.
. According to one aspect of the invention, said equipment is a snowboard.

Drawings

. Further characteristics and advantages of the equipment, the equipment body and the method will be evident from the following description of its preferred embodiments, made by way of a non-limiting example, with reference to the appended drawings, wherein:

Figure 1 is a schematic, vertical elevation view showing the equipment according to one embodiment and a user using the equipment;
Figure 2 is a schematic, vertical elevation view showing a solution of the prior art;
Figure 3 is an axonometric view showing the equipment according to one embodiment;
Figure 4 shows an axonometric view from above and from the front of the equipment;
Figure 5 shows the equipment from the back;
Figure 6 is a plan view of an equipment body for winter sports equipment according to one embodiment, in which some cutting planes in the transverse direction are indicated with sequential letters a) -i);
Figure 7 is a sectional view according to the cut indicated by the arrows VII-VII in figure 6;
Figure 8 shows the transversal profile of the base according to each of the cutting planes indicated by the sequential letters a) -i) in figure 6;
Figure 9 is an axonometric view of a ski, according to one embodiment, in which a boot associated to the ski is shown;
Figure 10 is a plan view of an equipment body for winter sports equipment according to one embodiment, in which some cutting planes in the transverse direction are indicated with sequential letters a) -h);
Figure 11 shows the transversal profile of the base according to each of the cutting planes indicated by the sequential letters a) -i) in figure 10;
Figure 12 is a plan view of an equipment body for winter sports equipment according to one embodiment, in which some cutting planes in the transverse direction are indicated with sequential letters a) -i);
Figure 13 shows the transversal profile of the base according to each of the cutting planes indicated by the sequential letters a) -i) in figure 12;
Figure 14 shows a schematic cross-section and in separate parts of an equipment body for winter sports equipment in which the cross-section is seen according to a cutting plane orthogonal to the longitudinal direction, as well as a possible step of a manufacturing method of the equipment body by use of a mould;
Figure 14bis shows a cross-section seen schematically according to a cutting plane orthogonal to the longitudinal direction of an equipment body comprising a core, according to one aspect of the invention;
Figure 15 is a plan view of a snowboard according to one embodiment;
Figure 16 is a plan view of asnowboard according to one embodiment in which some cutting planes in the transverse direction are indicated with sequential letters a) -i);
Figure 17 is a sectional view according to the cut indicated by the arrows XVII-XVII in figure 16;
Figure 18 shows the transversal profile of the base according to each of the cutting planes indicated by the sequential letters a) -i) in figure 16 and in figure 17;
Figure 19 is a plan view of a ski according to one embodiment, in which the core is highlighted;
Figure 20 is a sectional view according to the cut indicated by the arrows XX-XX in figure 19;
Figure 21 is a plan view of a ski comprising an equipment body according to one embodiment;
Figures 22A, 22B and 22C are cross-sections in separate parts for the sake of clarity seen according to the cutting planes indicated as a), b) and c), respectively, in Figure 21, in which the multi-layer structure of the equipment body is shown;
Figure 23 is a plan view of a ski comprising an equipment body according to one embodiment;
Figures 24A, 24B and 24C are cross-sections in separate parts for the sake of clarity seen according to the cutting planes indicated as a), b) and c), respectively, in Figure 23, in which the multi-layer structure of the equipment body is shown;
Figure 25 is a plan view of a ski comprising an equipment body according to an embodiment variant;
Figures 26A, 26B and 26C are cross-sections in separate parts for the sake of clarity seen according to the cutting planes indicated as a), b) and c), respectively, in Figure 25, in which the multi-layer structure of the equipment body is shown;

Description of some preferred embodiments

. According to a general embodiment, an equipment body 3 for winter sports equipment 1 is provided for.
. According to a general embodiment, a winter sports equipment 1 or equipment 1 comprises an equipment body 3, is provided for.
. According to one embodiment, said equipment 1 is a ski. According to one embodiment, said winter sports equipment 1 is a snowboard. According to one embodiment, said winter sports equipment 1 is a ski for off-piste skiing.
. According to a preferred embodiment, said equipment 1 is particularly suitable, but not exclusively intended for skiing off-piste. According to a preferred embodiment, said equipment 1 is suitable both for skiing on piste and off-piste.
. According to one embodiment, said equipment 1 is a water ski, suitable for water skiing.
. According to one embodiment, said equipment 1 is suitable to slide on a penetrable medium 2 associable with the equipment 1, wherein said penetrable medium 2 may be compact or soft snow, or may be water, wherein said penetrable medium 2 defines a surface level of penetrable medium 22, suitable to form the boundary of said penetrable medium 2 with the environment. For example, said surface level of penetrable medium 22 is the slope defined by the blanket of snow.
. Said equipment body 3 has a main extension in a longitudinal direction X-X. Said equipment body 3 further extends in a transverse or transversal direction Y-Y, orthogonal to the longitudinal direction X-X. A direction of thickness Z-Z is further defined, substantially orthogonal to both the longitudinal direction X-X, and the transverse direction Y-Y and the thickness of said equipment body 3 is measured in the direction of thickness Z-Z.
. Said equipment body further comprises an equipment body boundary 24 which defines opposite transverse boundary profiles 25, 26 which define the encumber in the transverse direction Y-Y of said equipment body 3. Said transverse boundary profiles 25, 26 are opposite with respect to the longitudinal direction X-X. According to one embodiment, said transverse boundary profiles 25, 26 comprise a first transverse boundary profile 25 and a second transverse boundary profile 26. According to one embodiment, said equipment body 3 is symmetrical with respect to the longitudinal direction X-X. In other words, said equipment body boundary 24 is symmetrical or specular with respect to the longitudinal direction X-X. In other words yet, said first transverse boundary profile 25 is specular to said second transverse boundary profile 26. According to one embodiment, said first transverse boundary profile 25 is non-specular to said second transverse boundary profile 26. According to one embodiment, said equipment body boundary 24 further comprises a front boundary 34 and a rear boundary 35 which define the longitudinal extension X-X of the equipment body 3. According to one embodiment, said opposites transverse boundary profiles 25, 26 define a waisted profile of the equipment body 3.
. Said equipment body 3 comprises a base surface 5, suitable to slide on a penetrable medium 2 associable with the equipment 1. Said base surface 5 defines at least partially the encumber of said equipment body 3 in the thickness direction Z-Z. Said equipment body 3 further comprises an attachment portion 6, facing opposite to said base surface 5 and suitable to form at least one attachment site 7 to connect directly or indirectly to a user 8 of the equipment 1. For example, said base surface 5 is suitable to slide on the snow. For example, said attachment site 7 is suitable to connect by connection means to a boot 4 of the user 8. Preferably, said attachment site 7 is suitable to connect directly or indirectly to a foot of a user 8 of the equipment 1.
. According to one embodiment, said equipment body 3 comprises a front portion 9 and a rear portion 10, longitudinally opposite to said front portion 9 with respect to said attachment portion 6. According to one embodiment, said front portion 9 of the equipment body 3 comprises a front end portion 39 comprising said front boundary 34 of the equipment body boundary 24. According to one embodiment, said rear portion 10 of the equipment body 3 comprises a rear end portion 40 comprising said rear boundary 35 of the equipment body boundary 24.
. According to one embodiment, said equipment body 3 comprises a core 23. Said core 23 is suitable for giving the equipment body 3 structural strength. At the same time, said core 23 is suitable to confer the backbone of the three-dimensional shape to the equipment body 3. Moreover, said core 23 gives the equipment body 3 a flexural and torsional elasticity able to absorb the stresses developing in operating conditions, when the equipment 1 is in use. Preferably, said core 23 is suitable to give said base surface 5 structural strength.
. Preferably, said core 23 extends in the transverse direction Y-Y for a portion of said equipment body 3. In other words, said core 23 has a smaller transverse dimension than the transverse dimension of said equipment body 3. This way, said core 23 has smaller transverse encumber than the distance between said opposite transverse boundary profiles 25, 26. The provision of said core 23 which extends in the transverse direction Y-Y for a portion of said equipment body 3, makes it possible to give the equipment 3 improved flexibility in the transverse direction Y-Y, and consequently also in the longitudinal direction X-X. Furthermore, by changing the transverse extension of said core 23, it is possible to adjust the flexibility of the equipment body 3 both in the transverse direction Y-Y, and in the longitudinal direction X-X.
. According to one embodiment, said front portion 9 of said equipment body 3 comprises a front portion of core 29. According to one embodiment, said rear portion 10 of said equipment body 3 comprises a rear portion of core 30, longitudinally opposite to said front portion of core 29. Said core 23 comprises at least a front core portion 29 and a rear core portion 30.
. Preferably, said front core portion 29 has a lesser extension in the transverse direction Y-Y than said front portion 9 of the equipment body 3. In other words, said front core portion 29 of the core 23 has a smaller transverse dimension than the distance between said opposite transverse boundary profiles 25, 26 of the front portion 9 of the equipment body 3. This way, an increased transverse flexibility of the front portion 9 of the equipment body 3 is allowed and consequently an increased longitudinal flexibility of the equipment body 3. According to one embodiment, said front portion of core 29 has an extension in the transverse direction Y-Y equal to two-thirds or less of the extension in the transverse direction Y-Y of said front portion 9 of the equipment body 3. According to one embodiment, said front portion of core 29 has an extension in the transverse direction Y-Y equal to half or less of the extension in the transverse direction Y-Y of said front portion 9 of the equipment body 3.
. According to one embodiment, said front portion of core 29 has a lesser extension in the transverse direction Y-Y than said front portion 9 of the equipment body 3 and said rear portion of core 30 has an extension in the transverse direction Y-Y substantially equal to the extension in the transverse direction Y-Y of said rear portion 10 of the equipment body 3. This way, it gives to the equipment body 3 improved flexibility in the front portion 9 while concurrently providing a stiffer response to the rear portion 10 of the equipment body 3.
. According to one embodiment, said rear core portion 30 has a lesser extension in the transverse direction Y-Y than said rear portion 10 of the equipment body 3. According to one embodiment, said front portion of core 29 has a lesser extension in the transverse direction Y-Y than said front portion 9 of the equipment body 3 and said rear portion of core 30 has a lesser extension in the transverse direction Y-Y than said rear portion 10 of the equipment body 3.
. According to a preferred embodiment, said equipment body 3 further comprises opposite lateral extensions 27, 28, or fins 27, 28, which extend from said front portion of core 29 to form said opposite transverse boundary profiles 25, 26. Said opposite lateral extensions 27, 28 comprise a first lateral extension 27, or first fin 27, and a second opposite lateral extension 28, or second opposite fin 28.
. Preferably, said opposite lateral extensions 27, 28 are more flexible than said front portion of core 29. In other words, said front portion of core 29 is more rigid than said opposite lateral extensions 27, 28. Said opposite lateral extensions 27, 28 of said equipment body 3 are not necessarily made of more flexible material than the front portion of core 29, but their composition and structure prove more flexible than that of said front portion of core 29.
. The provision of such equipment 1, as well as such an equipment body 3, comprising a more flexible front portion 9 of the equipment body 3 than the prior solutions, as described in the embodiments mentioned above, gives the front portion 9 improved floating characteristics on a penetrable medium 2, such as soft powder snow, in that it allows the lateral extensions 27, 28 to flex when in contact with the penetrable medium 2, for example with the surface layer of the penetrable medium 22, so as to favourably increase the contact surface with the penetrable medium 2.
. Preferably, each of said opposite lateral extensions 27, 28 has a greater extension in the longitudinal direction than its thickness measured in the thickness direction Z-Z. This way it is possible to make flexible or more flexible opposite lateral extensions 27, 28 of the core 23, at least transversely.
. Preferably, said opposite lateral extensions 27, 28 of said equipment body 3 are made in a separate piece from said core 23 and then assembled to said core 23.
. Preferably, said opposite lateral extensions 27, 28 of said equipment body 3 are more flexible with respect to said core 23. In other words, said core 23 is more rigid than said opposite lateral extensions 27, 28. Said opposite lateral extensions 27, 28 of said equipment body 3 are not necessarily made of more flexible material than said core 23, but their composition and structure prove more flexible than said core 23.
. Preferably, said front portion of core 29 is made seamlessly in the plane defined by the longitudinal direction X-X and by the transverse direction Y-Y. Preferably, said core 23 is made seamlessly in the plane defined by the longitudinal direction X-X and by the transverse direction Y-Y. This way increased structural strength is given to the equipment body 3.
. According to a preferred embodiment, said equipment body 3 has a multilayer or laminate structure and is composed of a plurality of layers, having a main extension in the longitudinal direction X-X and transverse direction Y-Y, superposed in the thickness direction Z-Z and intimately associated with each other. This way, discontinuities in the equipment body 3 in a transverse Y-Y, or longitudinal X-X direction are avoided, as well as junctions between separate pieces of the equipment body 3 facing in a transverse Y-Y or longitudinal X-X direction, which could structurally weaken the equipment body 3. According to one embodiment, said multilayer structure is realized by associating intimately to each other the layers of said plurality of layers by gluing, and preferably hot-gluing and/ or vacuum-bonding. According to one embodiment, the thickness of a layer of said plurality of layers is comprised between 0.3 mm and 5 mm, and preferably between 1.7 mm and 2.2 mm. These thicknesses are to be understood with a tolerance of about 10%.
. According to a preferred embodiment, said core 23 has a multilayer structure and is composed of a plurality of layers, having a main extension in the longitudinal direction X-X and transverse direction Y-Y, superposed in the thickness direction Z-Z and intimately associated with each other. Preferably, said plurality of layers composing the multilayer structure of said core 23, are made of wood. According to one embodiment, said plurality of layers composing the multilayer structure of said core 23, are made of material comprising wood. For example, said layers comprise wood laminates interspersed with layers of glue. Thanks to the provision of said plurality of layers glued together to form said core 23, the longitudinal flexibility of the equipment body 3 and consequently the transverse flexibility of the equipment body 3 is improved, since the glue interposed between adjacent layers allows reciprocal sliding between adjacent layers and increases the structural strength of the equipment body 3, preventing said equipment body 3 from breaking or cracking when subjected to bending. Preferably, said glue is an epoxy glue. According to one embodiment, said plurality of layers composing the multilayer structure of said core 23 are made of a composite material comprising wood and polymer material, such as resin. According to one embodiment, said plurality of layers composing the multilayer structure of said core 23 are made of a composite material comprising polymer material, such as resin, or polymer foam or plastic.
. According to a preferred embodiment, said front portion 9 of the equipment body 3 has a multilayer structure and comprises said front core portion 29, having a lesser extension in the transverse direction Y-Y than said front portion 9 of the equipment body 3, and at least a laminar structure 50 having an extension in a transverse direction Y-Y equal to the transverse extension of said equipment body 3 so as to form said opposite lateral extensions 27, 28 of the equipment body 3.
. Preferably, said at least one said laminar structure 50 is a multilayer structure and is composed of a plurality of layers, having a main extension in the longitudinal direction X-X and transverse direction Y-Y, superposed in the thickness direction Z-Z and intimately associated with each other. According to one embodiment, said laminar structure 50 comprises at least one layer intimately associated with said front core portion 29. According to one embodiment, said equipment body 3 comprises at least two laminar structures 50, each associated with an opposite surface of said core 23, to form a multilayer structure in the thickness direction Z-Z. This way, the front core portion 29 is sandwiched between two laminar structures 50. Preferably, said two laminar structures 50 are associated to each other to form said opposite lateral extensions 27, 28. According to one embodiment, said at least one laminar structure 50 forms in a single piece both said opposite lateral extensions 27, 28.
. According to one embodiment, said laminar structure 50 comprises a plurality of layers. Preferably said layers of said plurality of layers are made of composite material. Preferably said layers of said plurality of layers are made of carbon fibre sheets 32. This gives an increased lightness to the equipment body together with an increased flexibility, both transverse and longitudinal. Preferably, said laminar structures 50 of the front portion 9 of the equipment body 3 comprise at least three layers on the whole. Preferably, said laminar structures 50 of the rear portion 10 of the equipment body 3 comprise at least three layers on the whole.
. According to one embodiment, said equipment body 3 has a multilayer structure comprising, an equipment base 31, a laminar structure 50 comprising at least two layers associated with said equipment base 31, wherein between said equipment base 31 and said laminar structure 50 at least one reinforcement layer 49 is interposed, for example made of rubber or similar material, wherein said reinforcement layer 49 covers a boudary portion of said equipment base 31, and wherein said multilayer structure further comprises at least a polymer layer 48, for example made of high molecular weight polyethylene or similar material, associated with said laminar structure 50, and at least one fibreglass layer 47 associated to said polymer layer 48, and wherein said multilayer structure further comprises a core 23 associated to said fibreglass layer 47, and wherein said multilayer structure further comprises a further laminar structure 50 associated to said core 23, and wherein between said core 23 and said further laminar structure 50 at least one layer of polymer 48 is interposed, for example high molecular weight polyethylene or the like.
. According to one embodiment, said core 23 comprises a front core portion 29, a rear core portion 30 and an intermediate core portion 33 between said front core portion 29 and said rear core portion 30. According to one embodiment, the extension in the transverse direction Y-Y of said intermediate core portion 33 is greater than the extension in the transverse direction Y-Y of said front core portion 29, and said intermediate core portion 33 is joined to said front core portion 29. This way, greater structural strength and increased flexural rigidity is given to the intermediate core portion 33. Preferably, the intermediate core portion 33 is associated to said attachment portion 6 of the equipment 1. The provision of such an intermediate core portion 33, further gives the equipment body 3 an overall improved torsional flexibility, such as when the equipment 1 rolls, i.e. tilts transversely, while ensuring satisfactory structural strength in operating conditions.
. According to a preferred embodiment, said intermediate core portion 33 is substantially flat, avoiding being transversely bent. The provision of the intermediate, substantially flat core portion 33 allows a more stable attachment of the user 8 to the equipment body 3. In addition, the provision of said intermediate, substantially flat, core portion 33 makes said device 1 suitable for off-piste skiing.
. According to one embodiment, said intermediate core portion 33 comprises at least one transversely bent portion 43. In other words, at least a portion of said intermediate core portion 33 is bent in the transverse direction Y-Y.
. According to one embodiment, the extension in the transverse direction Y-Y of said core 23 increases continuously as it approaches said intermediate core portion 33. According to one embodiment, the extension in the transverse direction Y-Y of said intermediate core portion 33 is greater than both the extension in the transverse direction Y-Y of said front core portion 29, and the extension in a transversal direction Y-Y of said rear core portion 30. This way the flexibility of the front end portion 39 and of the rear end portion 40 of the equipment body 3, is increased.
. According to one embodiment, said front portion 9 of the equipment body 3 comprises a multilayer structure comprising a plurality of layers having a main extension in the longitudinal direction X-X and transverse direction Y-Y, superposed in the thickness direction Z-Z and intimately associated with each other, wherein said plurality of layers comprises: at least one layer to form a front portion of said equipment base 31 comprising said base surface 5, at least one layer to form said front core portion 29, at least one layer to form a laminar structure 50 interposed between said equipment base 31 and said core 23, and preferably, at least one layer to form a further laminar structure 50 associated to said core 23. Preferably, said two laminar structures 50 are associated to each other to form said opposite lateral extensions 27, 28. Preferably, said equipment base 31 is made in one piece, for example by moulding. Preferably, said equipment base 31 is made of polymeric material, for example of high molecular weight polyester, abbreviated as UHMWPE. Preferably, said equipment body 3 comprises a coating 45 made of polymeric material and waterproof.
. According to one embodiment, said equipment body 3 comprises a multilayer structure comprising a plurality of layers having a main extension in the longitudinal direction X-X and transverse direction Y-Y, superposed in the thickness direction Z-Z and intimately associated with each other, wherein said plurality of layers comprises: at least one layer to form an equipment base 31 comprising said base surface 5, at least one layer to form said core 23, at least one layer to form a laminar structure 50 interposed between said equipment base 31 and said core 23, and preferably, at least one layer to form a further laminar structure 50 associated to said core 23. Preferably, said two laminar structures 50 are associated to each other to form said opposite lateral extensions 27, 28.
. According to one embodiment, said core 23 has an extension in the longitudinal direction X-X substantially equal to the dimension in the longitudinal direction X-X of the equipment body 3. In other words, said core 23 extends in the longitudinal direction X-X substantially between said front boundary 34 and said rear boundary 35. According to one embodiment, said core 23 tapers towards said front boundary 34 to increase the flexibility of the front end portion 39 and of said equipment body 3. In other words, the thickness of said front core portion 29 decreases toward said front boundary 34. According to one embodiment, said core 23 tapers towards said rear boundary 35 to increase the flexibility of the rear end portion 40 and of said equipment body 3.
. According to one embodiment, said core 23 comprises at least one transversely bended portion 43.
. According to a preferred embodiment, said front core portion 29 comprises at least one transversely bent portion 43. In other words, at least a portion of said front core portion 29 is curved in the transverse direction Y-Y. In other words, said front core portion 29 comprises at least one section directed in the longitudinal direction X-X, transversely curved. The provision of said transversely bended portion 43 gives increased mechanical resilience to said core for the same flexibility. This way, it is possible to reduce the thickness and thus the weight of the core 23 for the same mechanical properties.
. According to a preferred embodiment, said front core portion 29 is bent so that the radius of curvature associated with said transversally bent portion 43 extends through said base surface 5. In other words, said front core portion 29 comprises at least one transversely concave portion having a concavity facing towards the penetrable medium 2. According to one embodiment, the term "radius of curvature associated with said concave portion" means the radius of a circle of osculation tangent to a prevailing direction of the transversely bent portion 43 of the front core portion 29. According to one embodiment, said transversely bent portion 43 of the front core portion 29 comprises a lower core surface 44, in which the transverse profile of said lower core surface 44 is concave, having a concavity facing towards the equipment base 31.
. According to a preferred embodiment, said base surface 5 defines a transverse base profile 11; in other words, the shape assumed by said base surface 5 when sectioned by a sectional plane perpendicular to the longitudinal direction X-X of the equipment 1 describes a transverse base profile 11.
. According to one embodiment, said transversely bent portion 43 of said front core portion 29 defines the shape of at least a portion of said transverse base profile 11. In other words, the transverse profile of said lower core surface 44 is substantially coincident with the transverse base profile 11.
. According to an embodiment variant, the transverse profile of said lower core surface 44 is different from the transverse base profile 11. For example, said core 23 may comprise a transversely bent portion 43 and said base surface 5 may be substantially flat. This way, the structural strength of the equipment body 3 is improved when subjected to bending and torsion. At the same time, the equipment body 3 can be made lighter for the same flexural or torsional strength of the equipment body 3.
. According to one embodiment, the transverse base profile 11 of said front portion 9 of the equipment body 3 is different from the transverse base profile 11 of said rear portion 10 of the equipment body 3. This way, it gives directionality to said equipment 1. Furthermore it makes it possible to make an asymmetric equipment body 3 with respect to a defined axis parallel to the transverse direction Y-Y.
. Preferably, said equipment body 3 is symmetrical with respect to a defined median axis M-M parallel to the longitudinal direction X-X.
. According to a preferred embodiment, said transverse base profile 11 comprises a concave portion 12, so that said base surface 5 comprises a transversely concave portion of surface.
. Said concave portion 12 extends for a prevailing portion in the transverse direction Y-Y of the front portion 9 of the equipment body 3 and said rear core portion 29 has a lesser extension in the transverse direction Y-Y than said front portion 9 of the equipment body 3. Preferably, said concave portion 12 of the transverse base profile 11 extends for a prevailing portion in the longitudinal direction X-X of the front portion 9 of the equipment body 3.
. According to one embodiment, said base surface 5 comprises a front portion of the base surface 15 comprising two opposite front faces of the base 16, 17 facing each other. Preferably, said two opposite front faces of the base 16, 17 are portions of a single continuous curved surface.
. According to one embodiment, the term "concave portion" means that the radius of curvature associated with said concave portion 12 of the transverse base profile 11 extends towards said penetrable medium 2, when said equipment 1 is in use. In other words, the radius of curvature associated with said concave portion 12 of the transverse base profile 11 avoids crossing said equipment body 3. This way, said transversely concave base surface portion, is suitable to face the penetrable medium 2, for example snow, when in operating conditions.
. The provision of said concave portion 12 that extends for a prevailing portion along the transverse direction Y-Y of the front portion 9 of the equipment body 3, provides the front portion 9 of the equipment body 3 with improved floating on the penetrable medium 2, such as fresh snow with a soft and powder consistency, in conditions of advancement substantially in a rectilinear direction, and at the same time an improved penetration of the penetrable medium 2, such as fresh snow with a soft consistency, when the equipment 1 rolls, in other words when it tilts transversely. In addition, the front portion 9 of the equipment body 3 is able to expose a greater contact surface to the penetrable medium 2, such as fresh snow with a soft consistency, compared to the prior solutions in which a front portion of the equipment is not contacting the penetrable medium 2, defining an unusable portion 21 of the prior art, as shown for example in figure 2 . As a result, a user 8 of the equipment 1 is able to assume a posture or stance which allows advancing his barycentre or centre of gravity with respect to the prior solutions.
. According to a preferred embodiment, said front core portion 28 comprises at least one portion transversely bent and extended in the longitudinal direction X-X, and said transverse base profile 11 comprises a concave portion 12 which extends for a prevailing portion in the transverse direction Y-Y of the front portion 9 of the equipment body 3. This way, the front core portion 28 favours the realization of the concave structural conformation of the concave portion 12 of the base surface 5, while ensuring a satisfactory flexibility of the front portion 9 of the equipment body 3.
. According to a preferred embodiment, said transverse base profile 11 comprises a concave portion 12 which extends for a prevailing portion in the transverse direction Y-Y of the front portion 9 of the equipment body 3 and a convex portion 13, so that said base surface 5 comprises a transversely convex surface portion. Preferably, said concave portion 12 of the transverse base profile 11 extends for a prevailing portion in the longitudinal direction X-X of the front portion 9 of the equipment body 3.
. According to one embodiment, said base surface 5 comprises a rear portion of the base surface 18 comprising two opposite rear faces of the base 19, 20. Preferably, said two opposite rear faces of the base 19, 20 are portions of a single continuous curved surface.
. Preferably, said convex portion 13 extends for a prevailing portion in the transverse direction Y-Y of the rear portion 10 of the equipment body 3. Preferably, said convex portion 13 of the transverse base profile 11 extends for a prevailing portion in the longitudinal direction X-X of the rear portion 10 of the equipment body 3.
. According to one embodiment, the term "convex portion" means a portion having a concavity opposite to said concave portion 12. As a result, the transversely convex base surface portion, is suitable to face the penetrable medium 2, for example snow, when in operating conditions. This way, the radius of curvature associated with said convex portion 13 extends through the equipment body 3. In other words, the radius of curvature associated with said convex portion 13 extends toward the user 8 of the equipment 1, when said equipment 1 is in use.
. The provision of said convex portion 13 which extends for a prevailing portion in the transverse direction Y-Y of the rear portion 10 of the equipment body 3, provides an improved penetration of the rear portion 10 in the penetrable medium 2, such as fresh snow with a soft consistency, in conditions of advancement substantially in a rectilinear direction, and at the same time an improved floating of the rear portion 10 of the equipment body 3 in rolling conditions, such as when turning. In other words, it prevents or at least greatly reduces the penetration of the rear portion 10 of the equipment body 3 in the penetrable medium 2, such as fresh snow with a soft consistency. In fact, thanks to said convex portion 13 of the rear portion 10 of the equipment body 3, it is possible to obtain, when the equipment 1 rolls, in other words tilts transversely, an increased contact surface with the penetrable medium 2 compared to the prior solutions.
. The provision of said concave portion 12 which extends for a prevailing portion in the transverse direction Y-Y of the front portion 9 of the equipment body 3, in conjunction with the provision of said convex portion 13 which extends for a prevailing portion in the transverse direction Y-Y of the rear portion 10 of the equipment body 3, allows a user 8 of the equipment 1 to assume a posture or stance which allows him to move his barycentre or centre of gravity forward with respect to the prior solutions, in other words, it allows the user 8 of the equipment to move his barycentre significantly towards said front end portion 39 of the front portion 9 of the equipment body 3, compared to prior solutions. When said equipment 1 is a ski or a snowboard and said penetrable medium 2 is fresh snow with a soft consistency, such as the snow on off-piste routes, this allows faster and more elegant skiing and at the same time more precise turnings, leading to a reduction in the energy consumption of the user 8 and assisting the execution of sharper curves while ensuring satisfactory adherence, resulting in satisfactory control of the apparatus 1 by the user 8.
. Such a solution allows the orientation of the equipment body 3 substantially parallel to the surface of the penetrable medium 2, during use of the equipment 1. In other words, such a solution allows the orientation of the equipment body 3 substantially parallel to the surface level 22 of the penetrable medium 2, during use of the equipment 1.
. As shown for example in figure 1 with reference to the embodiment 1 in which said equipment is a ski and said penetrable medium 2 is fresh snow with a soft consistency, it defines a direction of posture S-S, or direction of stance S-S, which substantially joins the boot 4 of the user 8 connected to the equipment body 3 with the head of the user 8. Said direction of posture S- S forms with the longitudinal direction X-X of the equipment 1 an equipment angle α and forms with the direction of descent of the slope, a slope angle β. As shown in figure 1, the difference between said equipment angle α and said slope angle β is smaller than the prior solutions, as shown for example in figure 2 .
. At the same time, the provision of said concave portion 12 which extends for a prevailing portion in the transverse direction Y-Y of the front portion 9 of the equipment body 3, in conjunction with the provision of said convex portion 13 which extends for a prevailing portion in the transverse direction Y-Y of the rear portion 10 of the equipment body 3, makes it possible to achieve optimal behaviour of the equipment body 3 in roll conditions, such as when cornering, allowing the user 8 of the equipment 1 to perform accurate and fast curves. In fact, when the equipment rolls, in other words tilts transversely, the front portion 9 of the equipment body 3 penetrates the penetrable medium 2 providing a high grip and stability, while the rear portion 10 of the equipment body 3 is conducted effortlessly.
. Advantageously, the provision of said concave portion 12 which extends for a prevailing portion in the transverse direction Y-Y of the front portion 9 of the equipment body 3 and said convex portion 13 which extends for a prevailing portion in the transverse direction Y-Y of the rear portion 10 of the equipment body 3, makes it possible to achieve an opposite and synergistic effect between said front portion 9 and said rear portion 10.
. According to one embodiment, said rear core portion 30 comprises a transversally bent portion 43. According to one embodiment, said rear core portion 30 is bent so that the radius of curvature associated with said transversally bent portion 43 extends through said attachment portion 6. In other words, said front core portion 29 comprises at least one transversely convex portion having a concavity facing towards a user 8 associable with the equipment. According to one embodiment, said transversely bent portion 43 of the rear core portion 30 comprises a lower core surface 44, in which the transverse profile of said lower core surface 44 is convex, having a concavity facing towards the attachment portion 6 of the equipment body 3.
. According to a preferred embodiment, said transverse base profile 11 comprises a concave portion 12 which extends for a prevailing portion of the front portion 9 of the equipment body 3 in transversal direction Y-Y, and wherein said rear portion 10 of the equipment body 3 comprises a substantially flat transverse base profile 11. The provision of said rear portion 10 of the equipment body 3 comprising a substantially flat transverse base profile 11 allows optimal performance on compact snow, such as on-piste. According to one embodiment, said rear portion 10 of the equipment body 3 comprises a substantially flat transverse base profile 11 and the rear core portion 30 comprises a transversely bended portion 43.
. According to one embodiment, said rear core portion 30 comprises at least two tails 51, 52 which branch from a portion of said core 23. This way, improved stability is given to the rear portion 10 of the equipment body 3, and at the same time the formation of folds or bulging of the opposite lateral extensions 27, 28 of the equipment body 3 is avoided during use of the equipment, for example when the equipment 1 rolls, for example when cornering. According to one embodiment, said two tails 51, 52 comprise a first tail 51 and a second tail 52.
. According to one embodiment, said two tails 51, 52 join in said rear end portion 40 of the equipment body 3, forming a bridge portion 53. This way, said two tails 51, 52 define a window in said rear core portion 30.
. According to one embodiment, said opposite lateral extensions 27, 28 of the equipment body 3 comprise lateral end portions 37, 38, respectively. In other words, said lateral extension 27 comprises one lateral end portion 37 and said opposite lateral extension 28 comprises an opposite lateral end portion 38. Preferably, said lateral end portions 37, 38 have a substantially flat base surface 5. In other words, the base surface 5 of said lateral end portions 37, 38 is substantially parallel to the transverse direction Y-Y, avoiding being concave or convex. This way, the transverse base profile 11 associated with said front portion 9 of the equipment body 3 comprises inflection portions 36 between said concave portion 12 and the profile of the base surface 5 of said substantially flat lateral end portions 37, 38 . Equally, the transverse base profile 11 associated with said rear portion 10 of the equipment body 3 comprises inflection portions 36 between said convex portion 13 and the profile of the base surface 5 of said substantially flat lateral end portions 37, 38 . According to one embodiment, the term "inflection portion 36" means that the transverse base profile 11 presents a change of concavity.
. Thanks to the provision of such substantially flat lateral end portions 37, 38 the realisation of opposite edges of the equipment 1 is enabled, and allows said equipment 1 , when said equipment 1 is a ski or snowboard, satisfactory performance also on-piste.
. Preferably, the total extension in the transverse direction Y-Y of both said lateral end portions 37, 38 is less than the extension in a transverse direction Y-Y of said concave portion 12 of the front portion 9 of the equipment body 3, and even more preferably is less than half the extension in a transverse direction Y-Y of said concave portion 12. Preferably, the total extension in the transverse direction Y-Y of both said lateral end portions 37, 38 is less than the extension in a transverse direction Y-Y of said convex portion 13 of the rear portion 10 of the equipment body 3, and even more preferably is less than half the extension in a transverse direction Y-Y of said convex portion 13.
. The provision of such end portions 37, 38 allows said equipment 1, when said equipment 1 is a ski or snowboard, satisfactory performance both off-piste and on-piste.
. According to one embodiment, the curvature radius of the concave portion 12 of the transverse base profile 11 increases towards said front boundary 34 of said front portion 9 of the equipment body 3. This way, improved floating of the front portion 9 of the equipment body 3 is provided which prevents the front portion 9 of the equipment body 3 from penetrating the penetrable medium 2, such as snow with a soft consistency.
. According to one embodiment, said base surface 5 further defines a longitudinal median base profile 14. In other words, the shape assumed by said base surface 5 at the longitudinal median axis M-M of the equipment 1 describes said longitudinal median base profile 14. In other words, the shape assumed by said base surface 5 when sectioned by a sectional plane perpendicular to the transversal direction Y-Y of the equipment body 3 and passing substantially through the longitudinal median axis of the equipment 1 describes a longitudinal median base profile 14.
. According to one embodiment, the longitudinal median base profile 14 comprises a longitudinally concave portion 41 which extends at least for a prevailing direction of said front portion 9 of the equipment body 3. This way, a median longitudinal base profile 14 mainly of the camber type is obtained in the front portion 9 of the equipment body 3. According to one embodiment, the longitudinal median base profile 14 comprises a longitudinally convex portion 42 which extends at least for a prevailing direction of said rear portion 10 of the equipment body 3. This way, a median longitudinal base profile 14 mainly of the rocker type is obtained in the rear portion 10 of the equipment body 3.
. According to one embodiment, the longitudinal median base profile 14 comprises a longitudinally concave portion 41 which extends for a prevailing direction of said equipment body 3, and the longitudinal profile of said front end portion 39 and of said rear end portion 40 comprise longitudinally convex portions 42. This way, a median longitudinal base profile 14 mainly of the camber and of the rocker type is obtained at the front end 39 and rear end portions 40.
. According to one embodiment, said rear end portion 40 has a velodrome helmet shape, to provide improved aerodynamics.
. According to a general embodiment, the winter sports equipment 1 comprises an equipment body 3 as described in any or several of the embodiments described above. Preferably, said equipment 1 further comprises at least one attachment site 7 suitable to connect directly or indirectly to a boot 4 of the user 8 of the equipment 1.
. A manufacturing method of winter sports equipment 1, as well as an equipment body 3 for winter sports equipment 1 according to any of the embodiments described above will be described below.
. A manufacturing method of an equipment body 3 having a main extension in a longitudinal direction X-X and also extending in a transverse direction Y-Y, orthogonal to the longitudinal direction X-X, said equipment body comprising an equipment body boundary 24 which defines opposite transverse boundary profiles 25, 26 which define the encumber in the transverse direction Y-Y of said equipment body 3, said equipment body 3 comprising a front portion 9 and a rear portion 10, longitudinally opposite to said front portion 9, comprising the following steps.

A. Providing an equipment base 31 comprising a base surface 5.
B. Making a core 23 comprising at least a front core portion 29.
C. Associating opposite lateral extensions 27, 28 to said front core portion 29 to form said opposite transverse boundary profiles 25, 26, wherein said opposite lateral extensions 27, 28 are more flexible than said front core portion 29.
D. Associating directly or indirectly said core 23 to said equipment base 31.

. According to a possible operating method, said steps from A to D are performed in sequence in the order shown above.
. According to a possible operating method, said method comprises the following further step: E. Transversely bending said front core portion 29 having a smaller transverse dimension than the distance between said opposite transverse boundary profiles 25, 26 of said front portion 9 of the equipment body 3. Preferably, said step E is performed before step C. According to a possible operating method, said step E is performed between step B and step C.
. Preferably, step E is performed in a steam chamber. According to a possible operating method, the method comprises the further step of vaporising said core 23. Preferably, said step E is performed in an autoclave.
. According to a possible operating method, step E is performed in a vacuum environment. According to a possible operating method, step E is performed in a vacuum environment inside a steam chamber. This way it is possible to reach a pressure inside the steam chamber in which said core 23 is placed, at least twice atmospheric pressure, and preferably at least three times atmospheric pressure, and even more preferably at least ten times atmospheric pressure, resulting in a more efficient and rapid bending, while allowing at the same time a more homogeneous distribution of the pressure on the core 23 of the equipment body 3.
. Performing said step E under vacuum and / or in a steam chamber, transversely rigid or more rigid materials than the prior solutions, such as wood laminates of greater thickness compared to the prior solutions, can be bent.
. According to a possible operating method, said step E is performed using a single mould 46. Preferably, said mould 46 is made in one piece. Said mould 46 may be a positive mould which replicates the shape of the equipment body 3, or a negative mould.
. According to a possible variant, step E is performed with a pneumatic press, in which at least two moulds are provided.
. According to a possible operating method, said method comprises the further step of transversely bending said rear core portion 30. Preferably, this step is performed in the same way as said step E.
. According to a possible operating method, said method comprises the further step of making an attachment site 7 on an attachment portion 6 of said equipment body 3, facing opposite to said base surface 5.
. According to a possible operating method, said step B is performed by intimately joining a plurality of layers with one another to form the core 23. Preferably, said plurality of layers is glued together. The gluing of the plurality of layers makes said core 23 makes more flexible compared to a core made in a single piece, because a certain longitudinal and transverse relative sliding is allowed between the layers of the plurality of layers.
. According to a possible operating method, said step E is performed by bending at least a portion of said plurality of layers intimately associated to one another, to achieve a front core portion 29. Preferably, said step is performed in a vacuum environment.
. According to a possible operating method, said step C and said step E are performed in the same environment. According to a possible operating method, said step C is performed in a steam chamber. According to a possible operating method, the method comprises the further step of vaporizing said equipment body 3 so as to bend said opposite lateral extensions 27, 28. According to a possible operating method, said step C is performed in a vacuum environment.
. According to a possible operating method, at least said front core portion 29 of said core 23 is obtained from at least one wood veneer.
. According to a possible operating method, said core 23 is obtained from at least one wood veneer.
. According to a possible operating method, said method comprises the further step of intimately associating to said plurality of layers associated intimately to one another, at least one layer with a laminar structure 50 to form said opposite lateral extensions 27, 28, wherein said laminar structure 50 is composed of a plurality of layers, having a main extension in the longitudinal direction X-X and transverse direction Y-Y, superposed in the thickness direction Z-Z and intimately associated with each other.
. According to a possible operating method, said method comprises the further step of intimately associating to said core 23 at least two laminar structures 50 to form said opposite lateral extensions 27, 28, each associated to an opposite surface of said core 23, to form a multilayer structure in the thickness direction Z-Z. Preferably, said step is performed in a vacuum. Preferably, said laminar structures 50 each comprise at least one layer. Preferably, said laminar structures 50 each comprise at least two layers. Preferably, said laminar structures 50 of the front portion 9 of the equipment body 3 comprise at least three layers in all. Preferably, said laminar structures 50 of the rear portion 10 of the equipment body 3 comprise at least three layers in all.
. According to a possible operating method, said method comprises the further step of associating said two laminar structures 50 to each other to form said opposite lateral extensions 27,28.
. Advantageously, said method can also be used to make a core of an equipment body different from the embodiments so far described.
. According to one aspect of the invention, a manufacturing method is provided of a core for winter sports equipment, regardless of the shape of the equipment body of the winter sports equipment, wherein said core 23 comprises at least one transversely bent portion 43, which defines a transversely curved lower core surface 44 and wherein said method comprises the following steps:

transversely bending at least a portion of core 23.

. Preferably, this step is performed the same way as said step E, as described in any one of the methods of operation previously described and the embodiments described previously.
. According to a possible operating method, said method comprises the step of transversely bending said front core portion 29.
. According to a possible operating method, said method comprises the step of transversely bending said rear core portion 30.
. According to a possible operating method, said method comprises the step of transversely bending said intermediate core portion 33.
. According to a possible operating method, said core 23 is obtained from at least one wood veneer. Preferably, said core 23 is obtained by vaporising, shearing and veneering wood sheets
. Preferably, as shown for example in Figure 14bis , the equipment base 31 associated with said core has a substantially flat base surface 5 transversely for at least a portion of the equipment body. This way, it is possible to reinforce the structure of the equipment body 3 for the same weight of the equipment body, even for traditional skis or snowboards having a substantially flat base. Alternatively, said equipment base 31 has a base surface 5 transversely curved for at least a portion of the equipment body. Thanks to the provision of a transversely bent core 23 combined with an equipment base 31 having a flat base surface 5, it is possible to make an equipment body 3 having higher mechanical and structural strength for the same weight, with respect to the prior solutions, or having a lower weight for the same structural and mechanical resistance. By way of a non-limiting example, such core 23 made with said method can be associated to a base having a transverse base profile 11 as shown in figures 8d)-f), 11d)-i), 12a)-f), 18d)-f).
. The equipment 1 as well as equipment body 3 according to a second aspect of the invention will be described below.
. According to a general embodiment, the winter sports equipment 1 comprises an equipment body 3. According to a general embodiment, an equipment body 3 for winter sports equipment 1 has a main extension in a longitudinal direction X-X, said equipment body 3 also extending in a transverse direction Y-Y, orthogonal to the longitudinal direction X-X; wherein said equipment body 3 comprises a base surface 5 and an attachment portion 6, facing opposite to said base surface 5; and wherein said equipment body 3 comprises a front portion 9 and a rear portion 10, longitudinally opposite to said front portion 9 with respect to said attachment portion 6; and wherein said base surface 5 defines a transverse base profile 11; and wherein the transverse base profile 11 of said front portion 9 of the equipment body 3 is different from the transverse base profile 11 of said rear portion 10 of the equipment body 3; and wherein said transverse base profile 11 comprises a concave portion 12, so that said base surface 5 comprises a transversely concave portion of surface, wherein said concave portion 12 extends for a prevailing portion of the front portion 9 of the equipment body 3 in transversal direction Y-Y and a convex portion 13, so that said base surface 5 comprises a transversely convex surface portion, wherein said convex portion 13 extends for a prevailing portion of the rear portion 10 of the equipment body 3 in transversal direction Y-Y.
. The provision of said concave portion 12 which extends for a prevailing direction in the transverse direction Y-Y of the front portion 9 of the equipment body 3, in conjunction with the provision of said convex portion 13 which extends for a prevailing direction in the transverse direction Y-Y of the rear portion 10 of the equipment body 3, allows a user 8 of the equipment 1 to assume a posture or stance which allows him to move his barycentre or centre of gravity forward with respect to the prior solutions, in other words, it allows the user 8 of the equipment to move his barycentre significantly towards said front end front portion 39 of the front portion 9 of the equipment body 3, compared to prior solutions. When said equipment 1 is a ski or a snowboard and said penetrable medium 2 is fresh snow with a soft powder consistency such as, for example, the snow off-piste, this allows faster and more elegant skiing and at the same time more precise turning, resulting in a reduction in energy consumption by the user 8 and supports the execution of sharper turns while ensuring a satisfactory adherence. Such a solution allows the orientation of the equipment body 3 substantially parallel to the surface of the penetrable medium 2. In other words, such a solution allows the orientation of the equipment body 3 substantially parallel to the surface level 22 of the penetrable medium 2.
. As shown for example in figure 1 with reference to the embodiment in which said equipment is a ski and said penetrable medium 2 is fresh snow with a soft consistency, it defines a direction of posture S-S, or direction of stance S-S, which substantially joins the boot 4 of the user 8 connected to the equipment body 3 with the user's head 8. Said direction of posture S- S forms with the longitudinal direction X-X of the equipment 1, an equipment angle α and forms with the direction of descent of the slope, a slope angle β. As shown in figure 1 , the difference between said equipment angle α and said slope angle β is smaller than the prior solutions, as shown for example in figure 2 . At the same time, the provision of said concave portion 12 which extends for a prevailing direction in the transverse direction Y-Y of the front portion 9 of the equipment body 3, in conjunction with the provision of said convex portion 13 which extends for a prevailing direction in the transverse direction Y-Y of the rear portion 10 of the equipment body 3, makes it possible to achieve optimal behaviour of the equipment body 3 in roll conditions, such as when cornering, allowing the user 8 of the equipment 1 to perform accurate and fast turns. In fact, when the equipment rolls, in other words tilts transversely, the front portion 9 of the equipment body 3 penetrates the penetrable medium 2 providing a high grip and stability, while the rear portion 10 of the equipment body 3 is conducted effortlessly. Advantageously, the provision of said concave portion 12 which extends for a prevailing direction in the transverse direction Y-Y of the front portion 9 of the equipment body 3 and said convex portion 13 which extends for a prevailing direction in the transverse direction Y-Y of the rear portion 10 of the equipment body 3, makes it possible to achieve an opposite and synergistic effect between said front portion 9 and said rear portion 10.
. According to the second aspect of the invention, the transverse base profile 11 is independent of the realization of said core 23. According to one embodiment, said core 23 extends in the transverse direction Y-Y at least for a prevailing direction of the transversal extension of the equipment body 3. Preferably, said concave portion 12 of the transverse base profile 11 extends for a prevailing direction in the longitudinal direction X-X of the front portion 9 of the equipment body 3.
. According to the second aspect of the invention, the equipment 1 comprises an equipment body 3 according to any of the embodiments described above, where applicable, associated with the above mentioned advantages.
. The equipment 1 as well as an equipment body 3 according to a third aspect of the invention will be described below.
. According to a general embodiment, the winter sports equipment 1 comprises an equipment body 3.
. According to a general embodiment, an equipment body 3 for winter sports equipment 1 has a main extension in a longitudinal direction X-X, said equipment body 3 also extending in a transverse direction Y-Y, orthogonal to the longitudinal direction X-X; wherein said equipment body 3 comprises a base surface 5 and an attachment portion 6, facing opposite to said base surface 5; and wherein said equipment body 3 comprises a front portion 9 and a rear portion 10, longitudinally opposite to said front portion 9 with respect to said attachment portion 6; and wherein said base surface 5 defines a transverse base profile 11; and wherein the transverse base profile 11 of said front portion 9 of the equipment body 3 is different from the transverse base profile 11 of said rear portion 10 of the equipment body 3; and wherein the transverse base profile 11 comprises a concave portion 12, so that said base surface 5 comprises a transversely concave portion of surface, wherein said concave portion 12 extends for a prevailing portion of the front portion 9 of the equipment body 3 in transversal direction Y-Y, and wherein said rear portion 10 of the equipment body 3 comprises a substantially flat, transverse base profile 11. Preferably, said concave portion 12 of the transverse base profile 11 extends for a prevailing direction in the longitudinal direction X-X of the front portion 9 of the equipment body 3.
. The provision of said concave portion 12 which extends for a prevailing direction in the transverse direction Y-Y of the front portion 9 of the equipment body 3, provides the front portion 9 of the equipment body 3 with improved floating on the penetrable medium 2, such as fresh snow with a soft consistency, in conditions of advancement substantially in a rectilinear direction, and at the same time an improved penetration of the penetrable medium 2, such as fresh snow with a soft consistency, when the equipment 1 rolls. In addition, the front portion 9 of the equipment body 3 is able to expose a greater contact surface to the penetrable medium 2, such as fresh snow with a soft consistency, compared to the prior solutions in which a front portion of the equipment is not in contact with the penetrable medium, defining an unusable portion 21 of the prior art, as shown for example in figure 2 . As a result, a user 8 of the equipment 1 is able to assume a posture or stance which allows advancing his barycentre or centre of gravity with respect to the prior solutions. As shown for example in figure 1 with reference to the embodiment in which said equipment is a ski and said penetrable medium 2 is fresh snow with a soft consistency, it defines a direction of posture S-S, or direction of stance S-S, which substantially joins the boot 4 of the user 8 connected to the attachment site 7 of the equipment body 3 with the head of the user 8. Said direction of posture S- S forms with the longitudinal direction X-X of the equipment 1, an equipment angle α and forms with the direction of descent of the slope, a slope angle β. As shown in figure 1 , the difference between said equipment angle α and said slope angle β is smaller than the prior solutions, as shown for example in figure 2 . At the same time, the provision of said rear portion 10 of the equipment body 3 comprising a substantially flat transverse base profile 11 allows optimal performance on compact high-packed snow, such as on piste.
. According to the third aspect of the invention, the shape of the transverse base profile 11 is independent of the realization of said core 23. According to one embodiment, said core 23 extends in the transverse direction Y-Y at least for a prevailing direction of the transversal extension of the equipment body 3.
. According to the third aspect of the invention, the equipment 1 comprises an equipment body 3 according to any of the embodiments described above, where applicable, associated with the above mentioned advantages.
. The equipment 1 as well as an equipment body 3 according to a fourth aspect of the invention will be described below.
. According to a general embodiment, the winter sports equipment 1 comprises an equipment body 3.
. According to a general embodiment, an equipment body 3 for winter sports equipment 1 has a main extension in a longitudinal direction X-X, said equipment body 3 also extending in a transverse direction Y-Y, orthogonal to the longitudinal direction X-X; wherein said equipment body 3 comprises a base surface 5 suitable to slide and to float on said penetrable medium 2, and an attachment portion 6, facing opposite to said base surface 5 and suitable to form at least one attachment site 7 to connect directly or indirectly to a user 8 of the equipment 1; said equipment body 3 comprises a front portion 9 and a rear portion 10, longitudinally opposite to said front portion 9 with respect to said attachment portion 6; and wherein said base surface 5 defines a transversal base profile 11; and wherein the transverse base profile 11 of said front portion 9 of the equipment body 3, is different from the transverse base profile 11 of said rear portion 10 of the equipment body 3 and wherein said front portion 9 of the equipment body 3 comprises a substantially flat transverse base profile 11, and wherein said transverse base profile 11 comprises a convex portion 13 which extends for a prevailing portion of the rear portion 10 of the equipment body 3 in transversal direction Y-Y. According to one embodiment, said front portion 9 of the equipment body 3 comprises a substantially flat transverse base profile 11 and the front core portion 29 comprises a transversely bent portion 43. Preferably, said convex portion 13 of the transverse base profile 11 extends for a prevailing direction in the longitudinal direction X-X of the rear portion 10 of the equipment body 3.
. The provision of said convex portion 13 which extends for a prevailing direction in the transverse direction Y-Y of the rear portion 10 of the equipment body 3, provides an improved penetration of the rear portion 10 in the penetrable medium 2, such as fresh snow with a soft consistency, in conditions of advancement substantially in a rectilinear direction, and at the same time an improved floating of the rear portion 10 of the equipment body 3 in rolling conditions, such as when turning. In other words, it prevents or at least greatly reduces the penetration of the rear portion 10 of the equipment body 3 in the penetrable medium 2, such as fresh snow with a soft consistency. In fact, thanks to said convex portion 13 of the rear portion 10 of the equipment body 3, it is possible to obtain, when the equipment 1 rolls, in other words tilts transversely, an increased contact surface with the penetrable medium 2 compared to the prior solutions. As shown for example in figure 1 with reference to the embodiment in which said equipment is a ski and said penetrable medium 2 is fresh snow with a soft consistency, it defines a direction of posture S-S, or direction of "stance" S-S, which substantially joins the boot 4 of the user 8 connected to the equipment body 3, with the user's head 8. Said direction of posture S- S forms with the longitudinal direction X-X of the equipment 1, an equipment angle α and forms with the direction of descent of the slope, a slope angle β. As shown in figure 1 , the difference between said equipment angle α and said slope angle β is smaller than the prior solutions, as shown for example in figure 2 . At the same time, the provision of said front portion 9 of the equipment body 3 comprising a substantially flat transverse base profile 11, allows optimal performance on compact snow, such as on piste.
. According to the fourth aspect of the invention, the shape of the transverse base profile 11 is independent of the realization of said core 23. According to one embodiment, said core 23 extends in the transverse direction Y-Y at least for a prevailing direction of the transversal extension of the equipment body 3. According to the fourth aspect of the invention, the rear core portion 30 comprises at least one transversely bent portion 43 which comprises a lower core surface 44, in which the transverse profile of said lower core surface 44 is convex, having a concavity facing towards the attachment portion 6 of the equipment body 3.
. According to the fourth aspect of the invention, the equipment 1 comprises an equipment body 3 according to any of the embodiments described above, where applicable, associated with the above mentioned advantages.
. The equipment 1 as well as an equipment body 3 according to a fifth aspect of the invention will be described below.
. According to a general embodiment, the winter sports equipment 1 comprises an equipment body 3.
. According to a general embodiment, an equipment body 3 for winter sports equipment 1 has a main extension in a longitudinal direction X-X, said equipment body 3 also extending in a transverse direction Y-Y, orthogonal to the longitudinal direction X-X; said equipment body comprising an equipment body boundary 24 which defines opposite transverse boundary profiles 25, 26 which define the encumber in the transverse direction Y-Y of said equipment body 3; wherein said equipment body 3 comprises a base surface 5 suitable to slide on a penetrable medium 2, and an attachment portion 6, facing opposite to said base surface 5 and suitable to form at least one attachment site 7 to connect directly or indirectly to a user 8; and wherein said equipment body 3 comprises a core 23, and wherein said core 23 comprises at least one transversely bended portion 43, and wherein said base profile 5 is substantially flat. Said at least one transversely bent portion 43 defines a curved lower core surface 44. This way, it is possible to reinforce the structure of the equipment body 3 for the same weight of the equipment body, even for traditional skis or snowboards having a substantially flat base. Thanks to the provision of a transversely bent core 23 combined with a flat equipment base 31, it is possible to make an equipment body 3 having higher mechanical and structural strength for the same weight, with respect to the prior solutions, or having a lower weight for the same structural and mechanical resistance.
. According to the fifth aspect of the invention, the equipment 1 comprises an equipment body 3 according to any of the embodiments described above, where applicable, associated with the above mentioned advantages.
. Thanks to the characteristics described above, provided separately or in combination, where applicable, in particular embodiments, it is possible to meet the aforementioned needs obtaining the aforementioned advantages, and in particular:

to obtain winter sports equipment with excellent performance both on-piste and off-- piste, such as on compact, high-packed snow and snow with a soft, powdered consistency;
to obtain an equipment body for winter sports equipment having a particularly suitable conformation to allow elegant skiing both on- and off-piste;
to provide a production method of an equipment body comprising a flexible and resistant core.

. A person skilled in the art may make numerous modifications and adaptations to the embodiments described above, replacing elements with others functionally equivalent so as to satisfy contingent and specific requirements while remaining within the sphere of protection of the following claims.

List of references

1.: Winter sports equipment
2.: Penetrable medium, such as snow
3.: Equipment body
4.: Boot
5.: Base surface
6.: Attachment portion
7.: Attachment site
8.: User
9.: Front portion
10.: Rear portion
11.: Transverse base profile
12.: Concave portion
13.: Convex portion
14.: Longitudinal base profile
15.: Front base portion
16.: Front base face
17.: Opposite front base face
18.: Rear base portion
19.: Rear base face
20.: Opposite rear base face
21.: Unusable portion of the prior art
22.: Surface level of the penetrable medium
23.: Core
24.: Equipment body boundary
25.: Transverse boundary profile
26.: Opposite transverse boundary profile
27.: First lateral extension, or first fin
28.: Second opposite lateral extension, or second opposite fin
29.: Front core portion
30.: Rear core portion
31.: Equipment base
32.: Carbon fibre sheet
33.: Intermediate core portion
34.: Front boundary
35.: Rear boundary
36.: Inflection portion of the transverse base profile
37.: Lateral end portion
38.: Opposite lateral end portion
39.: Front end
40.: Rear end
41.: Longitudinally concave portion
42.: Longitudinally convex portion
43.: Transversely bended core portion
44.: Lower core surface
45.: Coating
46.: Mould
47.: Fibreglass layer
48.: Polymer layer
49.: Reinforcement layer
50.: Laminar structure
51.: First tail of the rear core portion
52.: Second tail of the rear core portion
53.: Bridge portion of the rear core portion
X-X.: Longitudinal direction of the equipment body
Y-Y.: Transverse direction or transversal direction of the equipment body
Z-Z.: Thickness direction of the equipment
S-S.: Posture or stance direction
M-M.: Longitudinal median equipment axis
α.: Equipment angle
β.: Slope angle

Claims

Equipment body (3) for winter sports equipment (1), said equipment body (3) having a main extension in a longitudinal direction (X-X), said equipment body (3) also extending in a transverse direction (Y-Y), orthogonal to the longitudinal direction (X-X); said equipment body (3) comprises an equipment body boundary (24) which defines opposite transverse boundary profiles (25, 26) which define the encumber in the transverse direction (Y-Y) of said equipment body (3); wherein said equipment body (3) comprises a base surface (5) and an attachment portion (6), facing opposite to said base surface (5); and wherein said equipment body (3) comprises a front portion (9) and a rear portion (10), longitudinally opposite to said front portion (9) with respect to said attachment portion (6);
and wherein said equipment body (3) comprises a core (23), said front portion (9) of said equipment body (3) comprising a front portion of the core (29); and wherein said front core portion (29) has a smaller transverse dimension than the distance between said opposite transverse boundary profiles (25, 26) of said front portion (9) of the equipment body (3) and wherein said equipment body (3) further comprises opposite lateral extensions (27, 28), extending transversely from said front portion of core (29) to form said opposite transverse boundary profiles (25, 26), said opposite lateral extensions (27, 28) being more flexible than said front portion of core (29);
and wherein said base surface (5) defines a transverse base profile (11); and wherein the transverse base profile (11) of said front portion (9) of the equipment body (3) is different from the transverse base profile (11) of said rear portion (10) of the equipment body (3);
and wherein said transverse base profile (11) comprises a concave portion (12), so that said base surface (5) comprises a transversely concave portion of surface;
and wherein said concave portion (12) extends for a prevailing portion of the front portion (9) of the equipment body (3) in transversal direction (Y-Y).
Equipment body (3) according to claim 1, wherein said front core portion (29) comprises at least one transversely bent portion (43); and/or wherein
said transversely bent portion (43) of said front core portion (29) defines the shape of at least a portion of said transverse base profile (11).
Equipment body (3) according to claim 1 or 2, wherein said front portion (9) of the equipment body (3) has a multilayer structure and comprises said front portion of core (29), and at least a laminar structure (50) having an extension in a transverse direction (Y-Y) equal to the transverse extension of said equipment body (3) so as to form said opposite lateral extensions (27, 28) of the equipment body (3).
Equipment body (3) according to claim 3, wherein said at least one laminar structure (50) comprises a plurality of layers.
Equipment body (3) according to any of the preceding claims, wherein said opposite lateral extensions (27, 28) of said equipment body (3) are made in a separate piece from said core (23) and then assembled to said core (23).
Equipment body (3) according to any of the preceding claims, wherein said core (23) further comprises a rear core portion (30) and an intermediate core portion (33), between said front core portion (29) and said rear core portion (30); and wherein the extension in the transverse direction (Y-Y) of said intermediate core portion (33) is greater than the extension in the transverse direction (Y-Y) of said front core portion (29).
Equipment body (3) according to claim 6, wherein said rear portion of core (30) has a lesser extension in the transverse direction (Y-Y) than said rear portion (10) of the equipment body (3).
Equipment body (3) according to any of the preceding claims, wherein said transverse base profile (11) comprises a convex portion (13), so that said base surface (5) comprises a transversely convex portion of surface, and wherein said convex portion (13) extends for a prevailing portion of the rear portion (10) of the equipment body (3) in transversal direction (Y-Y);
or wherein said rear portion (10) of the equipment body (3) comprises a substantially flat transverse base profile (11).
Equipment body (3) according to any of the preceding claims, wherein said equipment body (3) has a multilayer structure and is composed of a plurality of layers, having a main extension in the longitudinal direction (X-X) and transverse direction (Y-Y), superposed in the thickness direction (Z-Z) and intimately associated with each other; and wherein said equipment body (3) further comprises opposite lateral extensions (27, 28) which extend from said core (23) to form said opposite transverse boundary profiles (25, 26).
Equipment body (3) according to any of the preceding claims, wherein said opposite lateral extensions (27, 28) of the equipment body (3) comprise lateral end portions (37, 38) which have a substantially flat base surface (5), so that the transverse base profile (11) associated to said front portion (9) of the equipment body (3) comprises inflection portions (36) between said concave portion (12), and the transverse base profile (11) of the base surface (5) of said lateral end portions (37, 38).
Equipment body (3) according to any of the preceding claims, wherein said concave portion (12) of the transverse base profile (11) extends for a prevailing direction in the longitudinal direction (X-X) of the front portion (9) of the equipment body (3); and /or wherein
said convex portion (13) of the transverse base profile (11) extends for a prevailing portion of the rear portion (10) of the equipment body (3) in the longitudinal direction (X-X); and /or wherein
said base surface (5) comprises two opposite front surfaces of the base (16, 17); and / or wherein two opposite front faces of the base (16, 17) are portions of a single continuous curved surface;
and /or wherein
said base surface (5) comprises two opposite rear surfaces of the base (19, 20); and / or wherein
said two opposite front faces of the base (19, 20) are portions of a single continuous curved surface; and /or wherein
the curvature radius of the concave portion (12) of the transverse base profile (11) increases towards said front boundary (34) of said front portion (9) of the equipment body (3);and /or wherein said rear core portion (30) comprises two tails (51, 52) which branch from a portion of said core (23); and /or wherein
said equipment body (3) is symmetrical with respect to the longitudinal direction (X-X); and / or wherein
said first transverse boundary profile (25) is specular to said second transverse boundary profile (26).
Winter sports equipment (1), comprising an equipment body (3) according to any one of the preceding claims, wherein said equipment (1) is a ski or a snowboard.
Manufacturing method of an equipment body (3) for winter sports equipment (1), said equipment body (3) having a main extension in a longitudinal direction (X-X) and also extending in a transverse direction (Y-Y), orthogonal to the longitudinal direction (X-X), said equipment body further comprises an equipment body boundary (24) which defines opposite transverse boundary profiles (25, 26) which define the encumber in the transverse direction (Y-Y) of said equipment body (3), said equipment body (3) comprising a front portion (9) and a rear portion (10), longitudinally opposite to said front portion (9), comprising the following steps:
A - Providing an equipment base (31) comprising a base surface (5);

B - Making a core (23) comprising at least a front core portion (29);

C - Associating opposite lateral extensions (27, 28) to said front core portion (29) to form said opposite transverse boundary profiles (25, 26), wherein said opposite lateral extensions (27, 28) are more flexible than said front core portion (29).

D - Associating directly or indirectly said core (23) to said equipment base (31).
Method according to claim 13, comprising the following further step:
E - Transversely bending at least said front core portion (29) having a smaller transverse dimension to the distance between said opposite transverse boundary profiles (25, 26) of said front portion (9) of the equipment body (3);
and / or wherein said step-E- is performed in a steam chamber; and/or wherein
said step-E- is performed in a vacuum environment; and/or wherein
said step-E- is performed using a single mould (46); and / or wherein
said step-E- is performed in an autoclave; and/or wherein
said step-E- is performed before step -C-; and/or wherein
said step-E- is performed between step -B- and step -C-; and/or wherein
said step -B- is carried out by gluing together a plurality of layers; and / or wherein
said steps-B-,-C-, and E- are performed in a vacuum environment; and/or wherein
said step -B- is performed by intimately joining to one another a plurality of layers, to make a core (23); and / or wherein
said plurality of layers are glued together; and / or wherein
said method comprises the further step of transversely bending said rear core portion (30); and / or
wherein this step is carried out in the same way as said step -E-; and / or wherein
said core (23) is obtained from at least one wood veneer.
Winter sports equipment (1), comprising an equipment body (3) having a main extension in a longitudinal direction (X-X), said equipment body (3) also extending in a transverse direction (Y-Y), orthogonal to the longitudinal direction (X-X); wherein said equipment body (3) comprises a base surface (5) suitable to slide on a penetrable medium (2), and an attachment portion (6), facing opposite to said base surface (5) and suitable to form at least one attachment site (7) to connect directly or indirectly to a user (8) of the equipment (1); and wherein said equipment body (3) comprises a front portion (9) and a rear portion (10), longitudinally opposite to said front portion (9) with respect to said attachment portion (6); and wherein said base surface (5) defines a transverse base profile (11); and wherein the transverse base profile (11) of said front portion (9) of the equipment body (3) is different from the transverse base profile (11) of said rear portion (10) of the equipment body (3); and wherein said transverse base profile (11) comprises a concave portion (12), so that said base surface (5) comprises a transversely concave portion of surface; wherein said concave portion (12) extends for a prevailing portion of the front portion (9) of the equipment body (3) in transversal direction (Y-Y) and a convex portion (13), so that said base surface (5) comprises a transversely convex surface portion, wherein said convex portion (13) extends for a prevailing portion of the rear portion (10) of the equipment body (3) in transversal direction (Y-Y).