EP3254576B1 - Sole for a shoe with one part to support the heel - Google Patents
Sole for a shoe with one part to support the heel Download PDFInfo
- Publication number
- EP3254576B1 EP3254576B1 EP17173024.5A EP17173024A EP3254576B1 EP 3254576 B1 EP3254576 B1 EP 3254576B1 EP 17173024 A EP17173024 A EP 17173024A EP 3254576 B1 EP3254576 B1 EP 3254576B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sole
- exhaust
- opening
- heel
- bridge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
- A43B13/18—Resilient soles
- A43B13/20—Pneumatic soles filled with a compressible fluid, e.g. air, gas
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
- A43B13/18—Resilient soles
- A43B13/181—Resiliency achieved by the structure of the sole
Definitions
- a further problem related in particular to soles having, a cavity opened on the shoe bottom in the part where the heel rests, such as for example the soles described in US5806210 and US6233846 , consists in that, in particular use conditions, this part of the heel, when heavily loaded, is comparatively rigid and does not provide a reliable and stable shock absorption. This is accounted for by the fact that, when the sole is pressed against the ground, air may remain trapped inside the cavity provided in the sole part where the heel rests.
- FIGS. 1-9 show a first form of embodiment of a sole according to the invention comprising a structural element 10 which develops so as to support the whole foot and which acts as a support for all sole components.
- This structural element 10 has a plurality of openings 2 ( fig. 1 ), 20 A, 31 A-E, and seats 15, 1N, 1P, 1Q ( fig. 2 ) and 1R ( fig. 2 ) for assembling and/or housing: a bridge element 5 ( fig. 3 ) and an air exhaust element 4 ( fig. 3 ) (suitable to be assembled in the seats 1N and 15, respectively), a shock-absorbing element 19 ( fig. 4 ), suitable to be housed in the seat 1P ( fig.
- FIGS 7 - 9 show the sole with all the above-listed elements.
- the structural element 10 can be divided into a rear region R1 ( fig. 2 ) suitable to support the heel, a central region R2 for the plantar arch and a front region R3 for the forefoot.
- a rear region R1 fig. 2
- central region R2 for the plantar arch
- a front region R3 for the forefoot.
- the structural element 10 in correspondence with its regions R1 and R2 adapted to support the heel and the plantar arch, has an elongated annular-shaped through opening 2, sized so that said first element 10 in correspondence with its rear part supporting the heel has a U-shape and comprises (in a bottom view) two opposite arms 1 A and 1B ( fig. 2 and fig. 7 ) connected by an arched arm 1C forming a U or a horseshoe shape.
- the inner walls 1A' 1B' 1C' ( fig. 7 ) of the above arms of the U shape delimit this annular-shaped opening 2 along with a bottom wall 6A.
- These arms 1A 1B 1C converge in a central part 6 of the first element 10 which includes the inner side wall 6A delimiting the opening 2 on the side.
- This opening 2 has advantageously an annular shape closed on the side.
- the opening 2 has an elongated drop-shape with a larger part 2A ( fig. 2 ) in the heel and a smaller part 2B in correspondence with the most central part 6 of the element 10 and suitable to support the foot plantar arch.
- the width L2 of this smaller part 2B of the cavity 2 ranges between 10% and 70% of the maximum width L1 of the larger part 2 A.
- the opening 2 is advantageously opened in correspondence with the sole face which is suitable to come into contact with the ground and in correspondence with said face it has a mouth 2C having the same size as the opening itself.
- the opening 2 extends over at least 50% of the sole part adapted to support the heel (said area is marked by a dashed line identified by reference T in fig. (8 ), preferably over at least 60% of said area T and more preferably over at least 70% of said area T.
- the elongated, drop-like shape of the opening 2 and of the bridge element 5 closing it has the advantage that the flexibility of the sole gradually increases as one moves away from the heel and gets closer to the plantar arch.
- the above cavity 20 is shaped so as to form a substantially closed cavity when the part of the sole suitable to support the heel is presses against the ground, the exhaust element 4 allowing the air contained in said cavity to flow out.
- the U-shaped arms 1A-C of the element 10 in correspondence with the face adapted to come into contact with the ground, have a hollow seat 1Q ( fig. 2 ) suitable to house an outer sole 13, also with a U-shape, suitable to increase the friction of the sole with the ground and ultimately to improve the grip of the sole to the ground.
- the outer sole 13 which is closest to the part of the sole supporting the plantar arch of the opposite arms 1 A and 1B of the U shape is not at all covered by the outer sole 13.
- the outer sole only covers an area from 30% to 70% of the face of the U-shaped arms 1A-B facing the ground.
- the larger opening 31A and relevant pad 19 A have a polygonal shape, such as for example a pentagonal shape with arched sides, and they have two converging front sides 22 A and 22B forming a K1 angle between 80 and 140°, more preferably between 90° and 130°, and two rear sides 22C 22 D forming an angle K2 between 90° and 20° and more preferably between 70° and 30°, as well as a rear extremal arched side with its concavity turned towards the rear part of the sole.
- a polygonal shape such as for example a pentagonal shape with arched sides
- they have two converging front sides 22 A and 22B forming a K1 angle between 80 and 140°, more preferably between 90° and 130°, and two rear sides 22C 22 D forming an angle K2 between 90° and 20° and more preferably between 70° and 30°, as well as a rear extremal arched side with its concavity turned towards the rear part of the sole.
- the hardness of the material of the structural element 10 is higher that the hardness of the material of the shock-absorbing element, preferably by 5% to 100% higher, more preferably by 10% to 50% higher and even more preferably by 15% to 30% higher.
- the element 10 is made of EVA or high-density polyurethane and/or a similar material.
- the two parts Z1' and Z3' of the sole may be connected with each other by a bridge element J (dashed in fig. 15 ), adapted to stiffen the plantar arch.
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- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Description
- It is an object of the present invention to provide a footwear sole according to the precharacterising part of the main claim.
- Footwear, particularly sports footwear, soles have long been known showing several technical problems: they are generally not simple and rapid to be produced, because they consist of plentiful components to be assembled to one another, furthermore known soles are comparatively heavy and they are not always sufficiently flexible.
- A further problem related in particular to soles having, a cavity opened on the shoe bottom in the part where the heel rests, such as for example the soles described in
US5806210 andUS6233846 , consists in that, in particular use conditions, this part of the heel, when heavily loaded, is comparatively rigid and does not provide a reliable and stable shock absorption. This is accounted for by the fact that, when the sole is pressed against the ground, air may remain trapped inside the cavity provided in the sole part where the heel rests. - Similar shock-absorbing problems are to be found in the known soles with reference to the sole area which is suitable to house the phalanxes and/or the plantar pad. In known soles, the flexibility and the shock-absorbing skills of the sole are not always sufficient in these areas.
- The object of the present invention is to implement a sole which overcomes the above-mentioned drawbacks, particularly which is suitable to improve the comfort of those who use the sole at least in correspondence with the sole part adapted to support the heel.
- A further object is to implement a sole with a reduced weight.
- A further object is to provide a sole which is simple and rapid to be produced and which consists of a limited number of components.
- These and other objects which will appear blatant to those skilled in the art are achieved by a sole according to the appended claims.
- For an improved understanding of the present invention, drawings are herewith enclosed by way of example and not of limitation, wherein:
-
fig. 1 shows a perspective schematic top view of a first component of the sole according to the invention; -
fig. 2 shows a perspective schematic bottom view of the component offig. 1 , -
fig. 3 shows a perspective schematic bottom view of a second component of the sole according to the invention; -
fig. 4 shows a perspective schematic bottom view of a third component of the sole according to the invention; -
fig. 5 and fig. 6 show a schematic bottom view of a fourth and of a fifth component of the sole according to the invention; -
fig. 7 shows a perspective schematic bottom view of a sole according to the invention, with all the relevant components assembled to one another, -
fig. 8 shows a schematic top view thereof, -
fig. 9 shows a schematic side view thereof, -
fig. 9A shows a schematic rear view thereof, -
fig. 10 shows a schematic sectional view according to the line D-D offig. 8 , showing a portion of the foot acting on the sole, -
figs. 11-17 show perspective bottom views of seven variations of the form of embodiment shown infigures 1-9 . - In the present context, such spatial terms as "vertical", "horizontal", "above", "below", "upper", "lower", "inner", "outer", "bottom", "top" are used to help describe the invention and with reference to the orientation of the forms of embodiment shown in the drawings. The terms "central", "side", "longitudinal", "crosswise" are used in the usual manner known to those skilled in the art.
- With reference to
figures 1-9 , they show a first form of embodiment of a sole according to the invention comprising astructural element 10 which develops so as to support the whole foot and which acts as a support for all sole components. Thisstructural element 10 has a plurality of openings 2 (fig. 1 ), 20 A, 31 A-E, andseats fig. 2 ) and 1R (fig. 2 ) for assembling and/or housing: a bridge element 5 (fig. 3 ) and an air exhaust element 4 (fig. 3 ) (suitable to be assembled in theseats fig. 4 ), suitable to be housed in theseat 1P (fig. 1 ) with thepads 19A-E fitted into the holes 31 A-E of thestructural element 10, and two elements 13 (fig. 6 ) and 23 (fig. 5 ) adapted to act as outer sole and suitable to be assembled inseats fig. 2 ) of thestructural element 10, respectively. -
Figures 7 - 9 show the sole with all the above-listed elements. - The
structural element 10 can be divided into a rear region R1 (fig. 2 ) suitable to support the heel, a central region R2 for the plantar arch and a front region R3 for the forefoot. Hereinafter the features of the rear R1 and central R2 regions will be described first and the features of the front region R3 will be described afterwards. - The
structural element 10, in correspondence with its regions R1 and R2 adapted to support the heel and the plantar arch, has an elongated annular-shaped throughopening 2, sized so that saidfirst element 10 in correspondence with its rear part supporting the heel has a U-shape and comprises (in a bottom view) twoopposite arms fig. 2 andfig. 7 ) connected by anarched arm 1C forming a U or a horseshoe shape. Theinner walls 1A' 1B' 1C' (fig. 7 ) of the above arms of the U shape delimit this annular-shaped opening 2 along with abottom wall 6A. - These
arms 1Acentral part 6 of thefirst element 10 which includes theinner side wall 6A delimiting theopening 2 on the side. Thisopening 2 has advantageously an annular shape closed on the side. For example, theopening 2 has an elongated drop-shape with alarger part 2A (fig. 2 ) in the heel and asmaller part 2B in correspondence with the mostcentral part 6 of theelement 10 and suitable to support the foot plantar arch. For example, the width L2 of thissmaller part 2B of thecavity 2 ranges between 10% and 70% of the maximum width L1 of thelarger part 2 A. - The
opening 2 is advantageously opened in correspondence with the sole face which is suitable to come into contact with the ground and in correspondence with said face it has amouth 2C having the same size as the opening itself. - The
opening 2 extends over at least 50% of the sole part adapted to support the heel (said area is marked by a dashed line identified by reference T infig. (8 ), preferably over at least 60% of said area T and more preferably over at least 70% of said area T. - The
opening 2 is closed in correspondence with theupper face 10 A (fig. 7 ) of theelement 10 by a bridge element 5 (fig. 3 ) comprising a substantiallyflat wall 5 A featuring: an outerperipheral section 5B suitable to be housed flush in ahollow seat 1 N provided in the upper face 1M (fig. 1 ) of thefirst element 10 of the sole and a centralstiffening section 5C (suitable to stiffen the bridge element crosswise) having a higher thickness (for example a thickness exceeding the thickness of the outerperipheral section 5B by 10% to 80%) and having such a shape as to partially enter the opening 2 flush. Thebridge element 5, through itsperipheral section 5B, is rigidly connected, for example by gluing (or in another way known to those skilled in the art), to thehollow seat 1N of theelement 10 so that these two elements form a single body. - The bridge element is shaped and sized so that it is substantially arranged under the heel. According to the invention, the
bridge element 5 is made of a harder material than the material of theelement 10 it is connected to. - For example, the hardness of the
bridge element 5 is from 10% to 200% higher than the hardness of theelement 10, preferably from 30% to 100% higher and even more preferably from 50% to 80% higher. - Relative to the material of the
element 10, when thebridge element 5 is assembled to therelevant seat 1N provided in theelement 10, the bridge element can be considered at least crosswise as a rigid or semirigid element (crosswise referring to the direction of the X axis offig. 3 ). - The
bridge element 5 is for example made of TPU and/or a similar material. By way of example, the hardness of the material of thebridge element 5 and/or of the exhaust element 4 (described in detail hereinafter) ranges between 65C and 100C, more preferably between 75C and 90C and even more preferably is about 85C. - The
element 10 is made of a more supple and flexible material than thebridge element 5, for example high-density EVA and/or a similar material. By way of example, the hardness of thestructural element 10 ranges between 40C and 70C, more preferably between 50C and 70C and even more preferably is about 60C. - On account of the crosswise rigid or
semirigid bridge element 5, when the force F1 (fig. 10 ) exerted by the heel acts thereupon, it does not bend or it bends only to a limited extent, so that it can convey this force F1 evenly along the perimeter of thehollow seat 1N of theelement 10. Ultimately, the bridge element has the function to concentrate the force F1 exerted by the heel in a well-defined portion of the sole, having a U-shape (more limited that in traditional soles, wherein the part supporting the heel is full and without the through opening 2), removing or limiting the components of this force acting horizontally (as shown schematically infig. 10 ). - On account of the bridge element, in the heel the sole has improved shock-absorbing features and a higher stability.
- On account of the high density of the material forming the
element 10, it can elastically absorb the high thrust concentrated by thebridge 5. - As regards the rigid or semi rigid behaviour of the bridge element, it must be considered with reference to its transverse axis, namely the X axis represented in
fig 3 . - The elongated, drop-like shape of the
opening 2 and of thebridge element 5 closing it has the advantage that the flexibility of the sole gradually increases as one moves away from the heel and gets closer to the plantar arch. - The sole according to the invention also comprises an
exhaust element 4 for the air which may remain trapped in the cavity 20 (fig. 10 ) formed by the throughopening 2 and by thebottom wall 5 when the part of the sole comprising thisopening 2 is pressed against the ground P (fig. 10 ), actually closing, at least partially, this cavity on the lower side as well. - Preferably the
above cavity 20 is shaped so as to form a substantially closed cavity when the part of the sole suitable to support the heel is presses against the ground, theexhaust element 4 allowing the air contained in said cavity to flow out. - It has been experimentally ascertained that the air remaining trapped in the
cavity 20 may adversely affect the shock-absorbing features of the sole in correspondence with the heel and that the presence of an exhaust element according to the invention solves this problem, improving such shock-absorbing features. - The
exhaust element 4 has a substantially rigid body providing at least one and preferably two throughholes 4A suitable to connect thecavity 20 with the sole outside and so as to exhaust the air contained in said cavity in correspondence with at least onesection 1C (fig. 9A ) of theouter side 1B of theelement 10. - The
exhaust element 4 preferably provides an outerarched wall 4C (fig. 9 A) and an inner arc-shaped wall 4B (fig. 3 ) suitable to be coupled flush with a section of the outer rear arc-shaped side wall 1C (fig. 9A ) of theelement 10 of the sole and with an arc-shaped section of the inner arc-shaped wall 1C' (fig. 2 ) delimiting the throughopening 2 on the side, respectively. - The
exhaust element 4 also shows: anupper face 4D, substantially flat and preferably also coplanar with theupper face 5F (fig. 8 ) of thebridge element 5, and alower face 4E, also preferably flat and parallel to theupper face 4D. - As shown in
figure 1 , theelement 10 has aseat 15 suitable to house the body of theexhaust element 4 flush (fig. 7-9 ), the latter being rigidly connected in this seat, for example, by gluing or by another conventional method known to those skilled in the art. - The
seat 15 for the exhaust element is advantageously provided in the most extremal part of theelement 10, namely in thearched arm 1C of the U-shaped part and is symmetrical to an Y longitudinal axis Y of the sole (fig. 8 ). - On account of this particular position of the
exhaust element 4, the sole is well-balanced and at any rate adapted to absorb the stresses it is submitted to in correspondence with the heel. - The exhaust element is a substantially rigid element, namely is an element which, if submitted to the usual forces exerted by the heel on the sole, does not significantly deform, so that the
passageways 4 A for the air are always open when the sole is submitted to the usual stresses. This outcome could not be achieved if the air exhaust passageways were provided directly in theU-shaped arms 1 A-C, because these would be compressed under the action of the force exerted on the sole and would hence close said passageways. - Advantageously the
exhaust element 4 and thebridge element 5 are implemented in a single piece, as shown infig. 3 with therear ending part 5D (fig. 3 ) of thebridge element 5 assembled to thefront part 4M of theelement 4. Advantageously the upper faces 4C and 5F of the twoelements fig. 8 ) to each other, so as to form a single flat surface for the heel to rest on. - The connection between the two
elements bridge element 5, at least in its rear part which is closest to theelement 4. - The
U-shaped arms 1A-C of theelement 10, in correspondence with the face adapted to come into contact with the ground, have ahollow seat 1Q (fig. 2 ) suitable to house an outer sole 13, also with a U-shape, suitable to increase the friction of the sole with the ground and ultimately to improve the grip of the sole to the ground. - The material this outer sole is made of is a material of a conventional kind for this part of a sole, for example it is a rubber, this kind of material has a comparatively high specific weight which affects the overall weight of the sole itself. In order to limit the overall weight of the sole, according to the invention, the extension of said outer U-shaped sole 13 is limited to only a portion P1 (
fig. 2 ) of the U-shaped arms provided in correspondence with the heel. Advantageously, aportion 31Afig. 2 ) of the lower face of thearms opening 2, of the U-shaped sole remains visible, namely is not covered by the outer sole 13 and aportion 31A'e 31B' (fig. 2 ) which is closest to the part of the sole supporting the plantar arch of theopposite arms U-shaped arms 1A-B facing the ground. - Advantageously, in order to improve the grip, the outer sole 13 is configured with raised and recessed elements.
- Advantageously, the outer sole 13 has
side portions 13 A-B (fig. 9 and9A ) partly extending also along therear side walls - The outer sole 13 housed in a
hollow seat 1Q provided in the U-shaped arms of theelement 10 and therefore is arranged at the same height as or only slightly protruding (for example 1 or 2 mm) relative to the face of said U-shaped arts facing the ground. - The outer sole is made of a material which is customary to a person skilled in the art for implementing said outer soles, such as a wear-resistant polymer or elastomer, natural or synthetic rubber, TPU, nylon or other polymer blends including TPU and/or nylon or other materials adapted to ensure the necessary functionalities.
- Preferably the hardness of the material composing the outer sole ranges between 50C and 90 C, more preferably between 60C and 80C and even more preferably is about 70C (measured with an LX manual durometer, scale: Shore C).
- According to a form of embodiment, the
element 10 in correspondence with the plantar arch has a plurality (for example 3) crosswise through slots 16 (fig. 2 ) entirely crossing thearms element 10 of the sole, in correspondence with its lower face. These slots are suitable to improve the sole flexibility. Theseslots 16 are not essential. - In the forefoot region R3 (
fig. 2 ), thestructural element 10 has five throughopenings 31A-E suitable to allow the fivepads 19A-E of the shock-absorbingelement 19 to be introduced into the openings themselves. Thepads 19A-E have their outermost face slightly convex and slightly protruding (for example protruding by 0.1 mm to 2 mm) from the face which remains visible of theelement 10 having theopenings 31A-E. - The shape, the size and the position of the
pads 19 A-E are substantially similar to those of the four digital pads (also called digital pulps) and to the metacarpal pad which are present in large felids such as cheetahs. - The
pads 19 A-E play the same function as the corresponding pads present in felids, namely to absorb shocks in both the metatarsal portion of the foot and the phalanxes. - The
larger opening 31A andrelevant pad 19 A are provided in the sole area adapted to support the front metatarsal portion of the foot sole, namely the so-called foot plantar pad. - The
larger opening 31A andrelevant pad 19 A have a polygonal shape, such as for example a pentagonal shape with arched sides, and they have two convergingfront sides rear sides 22C - The four
smaller openings 31B-E andrelevant pads 19B-E are provided in the sole area adapted to support the phalanxes. - More particularly, the four
openings 31B-E andrelevant pads 19B-E all have an annular shape. - The two larger annular openings and
pads 31C-D 19D-C are provided in correspondence with the front end portion of the sole, one on the right and one on the left of an axis of symmetry V (fig. 2 ) of this front portion of the sole, have a substantially elliptical shape in plan view, the major axes E1 and E2 (fig. 2 ) of thesepads openings - The two smaller annular openings and
pads 31B,E 19B, E are provided in correspondence with an intermediate part of the front portion of the sole, one on the right and one on the left of an axis of symmetry V (fig. 2 ) of this front portion of the sole, and they are arranged between the two largerannular pads 31C-D and themetatarsal pad 31A, they have a substantially triangular (as represented) or elliptical shape in plan view, the major axes E3 and E3 (fig. 2 ) of thesepads openings - As shown in
figure 4 , thepads 19A-E start from a substantiallyflat body 19F which, along with the pads, forms the shock-absorbingelement 19. Thisflat body 19F is suitable to be housed flush and to be rigidly connected to (for example by gluing or by other customary methods known to those skilled in the art) in theseat 1P (fig. 1 ) of thestructural element 10. Thisseat 1P and theflat part 19F of the shock-absorbing element are shaped so that each of thepads 19A-E is entirely encircled by a flat portion of theflat part 19F so that the pads are steadily connected to theupper face 1K (fig. 1 ) of the front portion of thestructural element 10. - Advantageously the
flat part 19F of the shock-absorbingelement 19 and therelevant seat 1P are sized and shaped so that theupper face 19H (fig. 8 ) remaining visible of the shock-absorbingelement 19 is substantially flush with and forms a single surface with theadjacent surfaces 10 A (fig. 8 ) of thestructural element bridge element 5. - It should be highlighted that the
flat part 19F of the shock-absorbing element is advantageously shaped and sized so as to substantially extend over the whole forefoot area of the sole (as visible infig. 8 ). In this way, in the forefoot region the sole has a shock-absorbing layer formed by the thickness of theflat part 19F of the shock absorbing element. For example, said flat part has a thickness between 0.1 mm and 10 mm, more preferably between 0.1 mm and 5 mm, and even more preferably between 0.1 mm and 2 mm. - As visible in
figure 4 , the pads start from theinner face 19G of the flat part withside walls 19A'. They are substantially perpendicular to saidface 19G and sized so that the upper face remaining visible of the pads slightly protrudes (for example protrudes by 0.1 mm to 2 mm) from theopenings 31A-E of thesupport element 10 and also from the outer sole 23 encircling said pads. - According to the invention, the material forming the shock-absorbing element is less dense and more supple and absorbing than the material forming the
structural element 10. - According to the invention, the density of the material of the
structural element 10 may be higher than the density of the material of the shock-absorbing element by at least about 5%, or 10%, or 15%, or 20%, or 25%, or 30%, or 35%, or 40%, or 45 %, or 50%, or 100%, or 150%, or 200% or more. - For example, the density of the material of the
structural element 10 is a high density and ranges between 1 pound per cubic foot and 20 pounds per cubic foot, preferably between 2 pounds per cubic foot and 12 pounds per cubic foot, or even more preferably between 10 and 13 pounds per cubic foot. - In general, the higher density of the material of the structural element allows implementing a more rigid and structurally more stable element than a material with a lower density of the shock-absorbing element.
- Advantageously also the hardness of the material of the
structural element 10 is higher that the hardness of the material of the shock-absorbing element, preferably by 5% to 100% higher, more preferably by 10% to 50% higher and even more preferably by 15% to 30% higher. - For example, the hardness of the material of the
structural element 10 ranges between 40C and 70C, more preferably ranges between 50C and 70C and even more preferably is about 60C (measured with an LX manual durometer, scale: Shore C). - For example, the hardness of the material of the
shock absorbing element 19 ranges between 40C and 60C and preferably is about 50C (measured with an LX manual durometer, scale: Shore C). - Advantageously, the
element 10 is made of EVA or high-density polyurethane and/or a similar material. - In correspondence with the front region R3 (
fig. 2 ) of the face facing the ground of thestructural element 10, a front outer sole 23 is available (fig. 5 ). Said front outer sole 23 has the same thickness and is made of the same material as the rear outer sole 13 described above. - Preferably, the outer sole 23 has a V-shape and is suitable to be associated only to the most extremal and lateral part of the front region of the shoe sole and not also to the part of the plantar pad.
- The outer sole has four through
openings 23 A-D having the same size and position as theopenings 31B-E (fig. 2 ) of thestructural element 10; the outer sole 23 hence completely encircles all thepads 19 B-E (as shown infig. 7 ). These pads slightly protrude (by 0,1mm e 2 mm) relative to the outer surface of the sole 23. - The outer sole has substantially a V- or a U-shape, the two
arms smaller openings base 23G of V which includes the other twoopenings - As usual, the sole provides an
extension 23F suitable to develop upwards so as to form an end bent towards the upper part of the sole on the front tip of the sole. - Advantageously, in order to improve the flexibility of the extremal forefoot part, the outer sole 23 has a central through
slot 23 H (fig. 5 ) provided between the twoopenings sections 23M provided between theopenings openings openings - As is the case with the rear outer sole 13, the front
outer sol 23 as well has a very limited extension so as to minimise the sole weight. - In actual fact, the whole region of the sole suitable to support the plantar arch, an extended area of the heel and the whole area of the plantar pad are without an outer sole. The outer sole with its
parts - It should be highlighted that the presence of the
wide opening 2 has the advantage, among others, to avoid a wide area of outer sole, thus affecting positively both the overall weight of the sole and the amount of material required to implement the sole itself. - The outer sole 23 is adapted to be introduced and connected into the
hollow seat 1R (fig. 2 ) provided in the face remaining visible of thestructural element 10, per example the outer sole 23 is glued (or assembled by another customary method known to those skilled in the art) to said seat. - The sole according to the invention is particularly simple to be implemented, since it comprises only five components which can be easily manufactured and rapidly assembled: the
structural element 10, the component which groups in a single body both thebridge element 5 and theair exhaust element 4, the shock-absorbingelement 19 which groups in a single body the fivepads 19A-E, and the rear 13 andfront 23 outer soles. - As is usual in soles of the kind described so far, the sole also has
customary side fig. 1 ) and rear 25B walls of a conventional shape for those skilled in the art, laterally starting from the upper face S (fig. 8 ) of thestructural element 10 and suitable to be assembled with said upper face of the sole to the shoe uppers (not represented). - According to the invention, the sole might also be implemented as follows:
- the forefoot part might be of a conventional type, with only the rear part comprising the features illustrated so far;
- or the sole might be implemented with a rear part of a conventional type and with only the forefoot part comprising the features illustrated so far,
- or the sole might provide two distinct parts, one suitable to support the heel and one suitable to support the forefoot (separated and distinguished from each other by a portion of the shoe uppers bottom to which said two parts are assembled), and these two parts might be shaped both with the heel part and with the forefoot part having the features described above or only with the heel part having said features or only with the forefoot part having said features.
-
Figure 11 shows a first variation of the invention; the elements of this variation in common with the form of embodiment illustrated above will not be further described and will be marked by the same reference numbers used to describe the form of embodiment shown infigures 1-9 , increased by 100. The sole according to the variation offig. 11 has astructural element 110, formed by one or more layers of plastic materials of the same type or of different type, which in correspondence with at least the heel area has anopening 102 closed by a wall 105' (or by abridge element 105 of the same type described above) and comprising anexhaust element 104 for the air which may remain trapped in the cavity defined by the walls delimiting theopening 102 and by the closing wall 105'. The forefoot part R3 of the sole is of a conventional type and is therefore not described in detail. -
Fig. 12 illustrates a second variation of the invention, showing a sole wherein the part Z1 for the heel and the part Z3 for the forefoot are distinct and separate parts and wherein the sole is without a central area suitable to support the plantar arch. This type of sole is customary for those skilled in the art and the two parts Z1 and Z3 are assembled in a conventional manner (for example by gluing) to the bottom F of the shoe uppers T; a section C of the bottom F of the shoe uppers being provided between the heel part Z1 and the forefoot part Z3 of the sole. According to the form of embodiment offig. 12 , the part Z1 of the sole provided in correspondence with the heel has astructural element 210, formed by one or more layers of plastic materials of the same type or of different type, which in correspondence with at least the heel area has anopening 202 closed by a wall 205' (or by abridge element 205 of the same type described above) and comprising anexhaust element 204 for the air which may remain trapped in the cavity defined by the walls delimiting theopening 202 and by the closing wall 205'. The forefoot part Z3 of the sole is of a conventional type and is therefore not described in detail. - As is customary for those skilled in the art, the two parts Z1 and Z3 of the sole may be connected with each other by a bridge element J (dashed in
fig. 12 ), preferably with a limited thickness, such as a plastic foil, adapted to stiffen the plantar arch; said bridge element J may be, for example, an extension of thebridge element 205 closing theopening 202. - This sole shows an improved longitudinal flexibility.
- The form of embodiment of
fig. 13 shows a variation compared to the form of embodiment offig. 12 , wherein theopening 302 provides, in addition to theair exhaust element 304 on therear part 301C of the sole, also a further front opening W to allow the air to be exhausted also on the front side (as shown by the arrow S1). The need for the rearair exhaust element 304 in this variation is accounted for by the circumstance that the front opening W may not be sufficient to exhaust the air present in theopening 302, for example because said opening is integrally or partially closed on account of the compression of the sole and/or because it is obstructed by the material built-up therein. Theexhaust element 304 ensures a more reliable and safer outflow of the air from theopening 2. - The form of embodiment of
figure 14 shows a further variation of the invention; the elements of this variation in common with the form of embodiment shown infigures 1-9 will not be further described and will be marked by the same reference numbers used to describe the form of embodiment shown infigures 1-9 , increased by 400. The sole according to the variation offig. 14 has astructural element 410 formed by one or more layers of plastic materials of the same type or of different type, which in correspondence with the forefoot area R3 has five through openings from which five pads 419 A-E protrude, and an outer sole 423, also having five openings in correspondence with the pads 419 A-E. This forefoot part is identical to the one described with reference tofigures 1-9 . The heel part R1 and the plantar arch part R2 of the sole are of a conventional type and will therefore not be described in detail. - This sole shows a forefoot part with improved shock-absorbing performance.
-
Fig. 15 illustrates a further variation of the invention, showing a sole wherein the part Zl' for the heel and the part Z3' for the forefoot are distinct and separate parts and wherein the sole is without a central area suitable to support the plantar arch. This type of sole is customary for those skilled in the art and the two parts Z1' and Z3' are connected in a conventional manner (for example by gluing) to the bottom F of the shoe uppers T. A section C of the bottom F of the shoe uppers is provided between the heel part Z1' and the forefoot part Z3' of the sole. According to the form of embodiment offig. 15 , the part Z3' of the sole provided in correspondence with the forefoot has five through openings from which five pads 519 A-E protrude, and an outer sole 523, also having five openings in correspondence with the pads 519 A-E. This forefoot part is identical to the one described with reference tofigures 1-9 . The heel part Z1' of the sole is of a conventional type and will therefore not be described in detail. - This sole shows an improved longitudinal flexibility.
- As is customary for those skilled in the art, the two parts Z1' and Z3' of the sole may be connected with each other by a bridge element J (dashed in
fig. 15 ), adapted to stiffen the plantar arch. -
Fig. 16 illustrates a further variation of the invention, showing a sole wherein the part Z1" for the heel and the part Z3" for the forefoot are distinct and separate parts and wherein the sole is without a central area suitable to support the plantar arch. This type of sole is customary for those skilled in the art and the two parts Z1" and Z3" are connected in a conventional manner (for example by gluing) to the bottom of the shoe uppers (not represented). A section (not represented) of the bottom of the shoe uppers is provided between the heel part Z1" and the forefoot part Z3" of the sole. According to the form of embodiment offig. 16 , the part Z3" of the sole provided in correspondence with the forefoot has five through openings from which fivepads 619 A-E protrude, and an outer sole 623, also having five openings in correspondence with thepads 619 A-E. This forefoot part is identical to the one described with reference tofigures 1-9 . The heel part Z1" has a structural element 610, formed by one or more layers of plastic materials of the same type or of different type, which in correspondence with at least the heel area has anopening 602 closed by abridge element 605 of the same type described above (or by a wall) and comprising anexhaust element 604 for the air which may remain trapped in the cavity defined by the walls delimiting theopening 602 and by thebridge element 605. The ends of the twoopposite arms part 606 whoseinner wall 606 A delimits theopening 602. - This sole shows an improved longitudinal flexibility.
- As is customary for those skilled in the art, the two parts Z1" and Z3" of the sole may be connected with each other by a bridge element J (dashed in
fig. 16 ), adapted to stiffen the plantar arch and advantageously forming a single piece with thebridge element 605. -
Figure 17 shows a further variation which is substantially identical to that offig. 16 , where however the forefoot part is divided into two distinct parts K2 and K3, each assembled to the bottom of the shoe uppers to which the sole is applied. The sole accordingly consists of three distinct parts: one for the phalanxes K3, one for the plantar pad K2 and one for the heel K1. According to this variation, the shock-absorbing element comprising the pads 719 A-E is obviously divided into two parts: one for thepad 719A and one showing the fourpads 719B-E, the same also applying to the support element, which is divided into three parts. - This sole shows an improved longitudinal flexibility.
- As for the previous forms of embodiment, the
bridge element 705 might provide an extension J to connect the parts K1 and K2 to each other. - Lastly, it should be pointed out once again that the forms of embodiment illustrated so far are provided by way of example and that plentiful further variations are possible, all falling within the same inventive notion. For example, the extension of the opening 2 (
fig. 1-9 ) might be different. Saidopening 2 might for example be shorter, so as to extend only in correspondence with the heel (as shown infig. 17 ) and not also integrally or partially under the plantar arch. Likewise, the bridge element might have a different shape compared to the one illustrated so far, said bridge element might for example be a wall forming a single piece with theside walls 1A', 1B', 1C', 6A defining theopening 2.
Claims (10)
- A footwear sole, comprising a structural element 10 providing at least one part R1 suitable to support the heel, wherein said part suitable to support the heel has an opening 2 sized and shaped so that said structural element 10, in correspondence with its part suitable to support the heel and with its face adapted to come into contact with the ground P, has a U-shape or a closed ring shape and comprises two opposite arms 1A, 1B linked by an arched arm 1C,- wherein the inner walls 1A' 1B' 1C' of the above arms of the U or of the closed ring at least partially delimit said opening 2,- wherein said opening 2 is opened in correspondence with the sole face adapted to come into contact with the ground,- wherein the opening 2 is closed in correspondence with the upper face 10A of the structural element 10 by a bridge element 5, so as to define a cavity 20 through said inner walls 1A', 1B', 1C',- wherein said bridge element 5 is shaped and sized so that it is substantially arranged under the heel,characterised in that it comprises:- an exhaust element 4 of the air which may remain trapped into said cavity 20 when the part of the sole comprising said opening 2 is pressed against the ground P, at least partially closing said cavity 20 on the lower side as well,- wherein said exhaust element 4 shows a substantially rigid body providing at least one through hole 4A suitable to link the cavity 20 with the outside of the sole and so as to exhaust the air present in said cavity in correspondence with at least one section 1C of the outer side walls 1B of the element 10,- the structural element 10 having a seat 15 suitable to house the body of the exhaust element 4.
- A sole according to claim 1, characterise in that the exhaust element 4 and the bridge element 5 consist of a single piece, so as to form a single body and so that said exhaust element helps to further stiffen the bridge element 5 crosswise.
- A sole according to one of the preceding claims, characterised in that the exhaust element 4 and the bridge element 5 consist of a single piece, so as to form a single body, and that a rear end part 5D of the bridge element 5 extends from a front part 4M of the element 4, so that said front part 4M of the element 4 helps to stiffen said bridge element 5 crosswise at least in its said read end part 5D and/or that the upper faces 4C, 5F of the two exhaust 4 and bridge 5 elements are coplanar to each other so as to form a single flat surface for the heel to rest on.
- A sole according to one of the preceding claims, characterised in that the ends of the walls 1A', 1B' of the opposite arms 1A and 1B of the U or of the closed ring are connected to each other by an end wall 6A opposite the arched wall 1C' of the arm 1C which links said two arms 1A and 1B of the U or the closed ring,- wherein said end wall 6A helps to delimit the opening 2,- wherein said wall 6A preferably consists of a central part 6 of the structural element 10,- wherein said opening 2 has preferably a closed annular shape in a bottom view,- wherein the cavity 20 provided at least under the heel is delimited by said walls 1A', 1B', 1C', 6A and by the bridge element 5.
- A sole according to one of the preceding claims, characterised in that the opening 2 is a through opening.
- A sole according to one of the preceding claims, characterised in that the seat 15 suitable to house the body of the exhaust element 4 is provided in the most extremal rear part of the structural element 10, in the arched arm 1C of the U or of the closed ring.
- A sole according to one of the preceding claims, characterised in that the bridge element 5 and/or the exhaust element 4 are made of a harder material than the structural element 10 to which they are constrained, preferably
the hardness of the material of the bridge element 5 and/or the exhaust element 4 is by 10% to 200% higher than the hardness of the material of the element 10, more preferably by 30% to 100% higher and even more preferably by 50% to 80% higher. - A sole according to one of the preceding claims, characterised in that the bridge element 5 and/or the exhaust element 4 are made of a material having a hardness ranging from 65C to 100C, more preferably from 75C to 90C and even more preferably amounting to about 85C; and that preferably the hardness of the material of the structural element 10 ranges from 40C to 70C, more preferably from 50C to 70C and even more preferably amounts to about 60C.
- A sole according to one of the preceding claims, characterised in that the bridge element is substantially rigid, at least crosswise.
- A sole according to one of the preceding claims, characterised in that the structural element 10 has such a shape and size as to support the whole foot, all the sole components being constrained to said structural element 10.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITUA2016A004126A ITUA20164126A1 (en) | 2016-06-06 | 2016-06-06 | SOLE FOR A FOOTWEAR WITH A PART TO SUPPORT THE HEEL |
Publications (2)
Publication Number | Publication Date |
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EP3254576A1 EP3254576A1 (en) | 2017-12-13 |
EP3254576B1 true EP3254576B1 (en) | 2019-03-27 |
Family
ID=57113578
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17173024.5A Expired - Fee Related EP3254576B1 (en) | 2016-06-06 | 2017-05-26 | Sole for a shoe with one part to support the heel |
Country Status (3)
Country | Link |
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EP (1) | EP3254576B1 (en) |
IT (1) | ITUA20164126A1 (en) |
WO (1) | WO2017212367A1 (en) |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN111655368A (en) | 2018-02-07 | 2020-09-11 | 巴斯夫欧洲公司 | Method for preparing silver impregnation solution |
WO2023222638A1 (en) * | 2022-05-16 | 2023-11-23 | Barre Invest | Sports shoe midsole, sports shoe, method for adapting a sports shoe and method for producing a sports shoe |
FR3135384A1 (en) * | 2022-05-16 | 2023-11-17 | Barre Invest | SPORTS SHOE MIDSOLE, SPORTS SHOE, METHOD FOR ADAPTING A SPORTS SHOE AND METHOD FOR MANUFACTURING A SPORTS SHOE |
FR3135383A1 (en) * | 2022-05-16 | 2023-11-17 | Barre Invest | METHOD FOR MANUFACTURING A SPORTS SHOE |
FR3135382A1 (en) * | 2022-05-16 | 2023-11-17 | Barre Invest | SPORTS SHOE MIDSOLE, SPORTS SHOE, METHOD FOR ADAPTING A SPORTS SHOE AND METHOD FOR MANUFACTURING A SPORTS SHOE |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5806210A (en) * | 1995-10-12 | 1998-09-15 | Akeva L.L.C. | Athletic shoe with improved heel structure |
DE29801638U1 (en) * | 1998-01-31 | 1998-05-20 | Danza S R L | Shoes, in particular sports or dance shoes |
US20070119076A1 (en) * | 2005-11-30 | 2007-05-31 | Fila Luxembourg S.A.R.L. | Enhanced unitary sole assembly |
-
2016
- 2016-06-06 IT ITUA2016A004126A patent/ITUA20164126A1/en unknown
-
2017
- 2017-05-26 EP EP17173024.5A patent/EP3254576B1/en not_active Expired - Fee Related
- 2017-05-26 WO PCT/IB2017/053107 patent/WO2017212367A1/en active Application Filing
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None * |
Also Published As
Publication number | Publication date |
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EP3254576A1 (en) | 2017-12-13 |
ITUA20164126A1 (en) | 2017-12-06 |
WO2017212367A1 (en) | 2017-12-14 |
WO2017212367A9 (en) | 2018-01-18 |
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