EP0552994B1 - Chaussure, en particulier chaussure de sport, comportant au moins un ressort disposé dans la semelle, cassette et ressort pour une telle chaussure - Google Patents

Chaussure, en particulier chaussure de sport, comportant au moins un ressort disposé dans la semelle, cassette et ressort pour une telle chaussure Download PDF

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Publication number
EP0552994B1
EP0552994B1 EP93400006A EP93400006A EP0552994B1 EP 0552994 B1 EP0552994 B1 EP 0552994B1 EP 93400006 A EP93400006 A EP 93400006A EP 93400006 A EP93400006 A EP 93400006A EP 0552994 B1 EP0552994 B1 EP 0552994B1
Authority
EP
European Patent Office
Prior art keywords
spring
plate
shoe
cassette
sole
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 - Lifetime
Application number
EP93400006A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0552994A1 (fr
Inventor
Jean Beyl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beyl Suzanne
Original Assignee
Beyl Suzanne
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beyl Suzanne filed Critical Beyl Suzanne
Publication of EP0552994A1 publication Critical patent/EP0552994A1/fr
Application granted granted Critical
Publication of EP0552994B1 publication Critical patent/EP0552994B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B21/00—Heels; Top-pieces or top-lifts
    • A43B21/24—Heels; Top-pieces or top-lifts characterised by the constructive form
    • A43B21/30—Heels with metal springs
    • 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
    • A43B13/182—Helicoidal springs
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B21/00—Heels; Top-pieces or top-lifts
    • A43B21/24—Heels; Top-pieces or top-lifts characterised by the constructive form
    • A43B21/32—Resilient supports for the heel of the foot

Definitions

  • the invention relates to a shoe of the kind which comprises at least one spring, arranged in the sole between an upper plate and a lower plate to absorb impacts on the ground, the spring being disposed substantially vertically above the heel of the user, between the rigid upper plate and the lower plate close to the ground, and being constituted by at least one spring of the torsion spring type which comprises at least one winding with a substantially horizontal axis provided at each of its ends with a radial extension arm, the two extreme radial arms forming an angle between them, the winding being arranged so as to bear externally against one of the plates while the ends of the arms are in abutment against the other plate, l winding can approach or move away from the plate from which it is distant in a direction substantially orthogonal to this plate, while the angular difference between l he arm increases or decreases under the effect of the load applied to the spring.
  • the invention relates more particularly to such a shoe intended for sports activities but can also be applied to shoes such as city shoes.
  • US-A- 4,756,095 shows a shoe of this kind.
  • one of the arms of the spring is immobilized in translation, while the winding of the spring is in sliding contact against the respective plate.
  • the production of such a shoe is relatively complex.
  • the spring does not exert a high reaction, which gives an impression of "soft" to the heel of the user.
  • the invention also aims to provide a shoe in which one can put in place a spring of a particular type capable of fulfilling its role of shock absorber over a reduced vertical elastic stroke of approximately 6 to 7 mm.
  • the upper plate and the lower plate may have U-shaped cross sections turning their concavity towards each other, and the wings of which fit together to ensure relative lateral holding of the two plates.
  • the upper plate is rigid and is entirely located behind a transverse line intended to be located under the metatarsus of the user's foot; the sole has a transverse articulation zone at this line so that the angle formed between the plane of the rigid upper plate and the part of the sole located in front of the articulation zone can vary; the walls of the upper of the shoe which surround the foot of the user are fixed, at their lower part, to the rigid upper plate; the spring (s) is (are) located under the single zone of the rigid plate intended to be located under the heel of the user, the assembly being such that the variations of the load applied to the spring cause an oscillating movement of the rigid upper plate around the transverse line of articulation, relative to the lower plate.
  • the rigid upper plate extends to the transverse line of articulation, which constitutes its front limit.
  • a layer of softer material may be provided under the lower surface of this rigid lower plate, to come into contact with the ground.
  • the rigid upper plate may have a surface limited to that of the heel of the shoe, while the lower plate has similar dimensions and is mounted with at least substantially vertical freedom in translation, relative to the upper plate
  • the spring is arranged to give, from the start of compression, a high load, which then only doubles, after a compression stroke of about 6 or 7 mm, so as to achieve good shock absorption.
  • the cassette has a triangular prismatic shape constituted by a dihedron produced with two rigid plates articulated along the edge around a transverse axis, a spring being disposed between the faces of this dihedron; this cassette is intended to be slid between an upper sole part and a lower sole part of the shoe, the length of the cassette being such that the axis of articulation is, in normal use of the shoe, substantially under the metatarsus of the user's foot, while the spring is located substantially vertical to the user's heel.
  • the spring comprises at least one winding provided at each of its ends with a radial extension arm, the two extreme radial arms having substantially the same radial dimension and forming between them an angle of approximately 60 °, and it comprises two windings in opposite direction coaxial, separated from each other by a free space, the end arms located axially towards the outside of these windings being connected by a branch parallel to the axis of the springs, the winding being intended to be disposed in external support against a plate, while the ends of the arms are intended to come into sliding contact against another plate, the winding being able to approach or move away from the plate from which it is distant in a direction substantially orthogonal to this plate, while the angular difference between the arms increases or decreases, under the effect of the load.
  • Figure 3 is an elevational view, on a larger scale, of the spring according to the invention.
  • Figure 5 is a schematic perspective view of a cassette intended to be introduced into the sole of a shoe.
  • Figure 6 is a cross section of the sole at the heel of a shoe according to the invention.
  • Figure 7 is a side view with parts in section of a shoe type city shoe according to the invention.
  • Figure 8 is a schematic perspective view of a detail of the shoe of Figure 6, on a larger scale.
  • Figure 9 shows, similarly to Figure 7, an alternative embodiment of a city shoe.
  • Figure 10 shows, similarly to Figure 9, another variant of a city shoe.
  • Figure 13 is a schematic side view of another alternative embodiment of the shoe.
  • the upper plate 2 is rigid, for example made of rigid plastic, having a low coefficient of friction.
  • This plate 2 is located behind a transverse front limit L, constituted by a line perpendicular to the plane of Figure 1, located in the area intended to be located under the metatarsus 4 of the user's foot.
  • the rigid upper plate 2 extends to the limit L which constitutes its transverse front edge.
  • the upper 9 of the shoe which envelops the foot F of the user, has its lower edges fixed on the periphery of the plate 2 and, towards the front, on the upper edge of the part 6.
  • the spring R is of the torsion spring 11 type; it is arranged, substantially vertical to the heel of the user, between the rigid upper plate 2 and the lower plate 3 close to the ground.
  • the spring 11 comprises two coaxial windings 12, 13, in opposite directions, separated from each other by a free space 14.
  • Each winding 12, 13 comprises radial end arms 12 a , 12 b , 13 a , 13 b forming between them an angle A, and substantially of the same length.
  • the arms 12b, 13b are located at the outer ends of the springs 12, 13 and are mutually parallel while the arms 12a, 13a are located at the inner ends of the windings 12, 13, these two arms being parallel also.
  • the outer arms 12b , 13b are connected, at their outer radial ends, by a branch 15 parallel to the axis of the windings.
  • the arms 12 a , 13 a located inwards are curved outwards, at their radial ends, along lugs 16 a , 16 b .
  • the spring 11 is arranged so that the windings 12, 13 bear externally against one of the plates, substantially along a generatrix.
  • the windings 12, 13 are in abutment against the upper plate 2, while the branch 15 and the legs 16 a , 16 b are in abutment against the lower plate 3.
  • the branch 15 and the legs 16 a , 16 b are in sliding contact against this plate 3, which is made of a material with low friction.
  • Means are provided for holding the spring 11 relative to the plate 2 in the longitudinal direction and in the position where the axis of the windings is transverse. These means can be constituted by a transverse groove 17 with a concave circular profile which comes to marry part of the cylindrical surface of the windings 12 and 13. The spring 11 is kept slightly compressed between the plates 2 and 3.
  • the space 18 located between the plates 2 and 3 and included between the articulation zone 5 and the spring 11 is free of any material so that the plate 2 can be angularly debated, relative to the plate 3, by oscillation around the articulation zone 5 during variations of the useful height H of the spring.
  • This useful height H is equal to the distance between the leg support plane 15 and the legs 16 a, 16 b and the plane parallel to this plane support externally tangent to the windings 12 , 13.
  • the space 18 a located behind the spring 11 is also free of any material.
  • the height H is approximately 18 mm when the spring 11 is not subjected to any load and the spring 11 is arranged so that, from the first millimeter of reduction in the height H, the load undergone, and therefore the reaction exerted by this spring, is around 35 daN.
  • the spring 11 is also arranged so that the vertical elastic stroke, that is to say the reduction in height H is approximately 6 or 7 mm for doubling the vertical load which caused the first millimeter of reduction height.
  • the angle A is advantageously chosen to be close to 60 ° at rest so that the angle between an extreme radial arm 12 a , 13 a or 12 b , 13 b and the vertical is approximately 30 ° ( AT 2 ).
  • the length of the lever arm d is substantially proportional to sin AT 2 .
  • the lever arm d increases when the compression of the spring occurs, at the same time as the action of the windings 12, 13 increases due to the increase in torsion. This increase in the length of the lever arm d mitigates the increase in the action of the windings.
  • the outer contours of the plates 2 and 3 are connected by a flexible wall 19, similar to the wall of a bellows, capable of absorbing the oscillating movements of the plate 2 relative to the plate 3.
  • the lower plate 3 can be provided on its lower surface with a layer 20 of softer material, which also extends under the front part 6 of the shoe so as to constitute only a single ply.
  • the plates 2 and 3 preferably have a U-shaped cross section turning their concavity towards each other.
  • the concavity of the section of the upper plate 2 is turned downwards and the wings 21, 22 of this section, which are substantially vertical, are engaged between the wings 23, 24, facing upwards of the lower plate 3.
  • the lower edge of the wings 21, 22 is located below the upper edge of the wings 23, 24.
  • the spring 11 is calibrated so as to absorb, at the very start of its travel, for example in the first millimeter of reduction in the useful height H, a load corresponding substantially to half the weight of the user.
  • the tightening of the foot in the shoe by lacing, or equivalent means remains the same during the vertical movements of the foot, while in a shoe where the vertical elasticity is produced inside the shoe, the tightening of the foot, in particular by lacing, varies constantly.
  • the load reached after 6 mm of crushing would be substantially equal to six times the load obtained after 1 mm of crushing.
  • the torsion spring 11 of the invention occupies almost the entire width of the heel of the shoe, which contributes to good lateral stability, the axis of the winding being placed horizontally. In the case of conventional compression springs, several springs would be necessary.
  • shoes which provide, as means of cushioning in the heel, flexible materials, of the elastomer or equivalent material type, are very soft at the start of the crushing, hence a lack of lateral stability, and harden then very quickly at the end of the crushing.
  • the axis 26 is intended to be located substantially under the metatarsus 4 of the foot of the user, while the spring 11 is disposed between the faces 102, 103 of the dihedral backwards where it is held by any suitable means.
  • the upper plate 102 has a U-shaped cross section turning its concavity downward, as shown in FIG. 6, and comprising lateral wings 104, 105 extending downward, substantially in a vertical plane.
  • the lower plate 103 also has a U-shaped cross section turning its concavity upwards and limited, on the sides, by vertical lateral wings 106, 107 situated inside the wings 104, 105, with reduced play. .
  • the cooperation between the lateral wings of the plates 102 and 103 ensures transverse maintenance of one plate relative to the other.
  • the lateral wings 104, 105 of the upper plate comprise, at their front end, an ear such as 27 framing a notch provided in the front edge of the upper plate 102.
  • Each ear 27 has a hole serving bearing at the ends of axis 26.
  • the lower plate 103 comprises a cylindrical sleeve 28 forming its front transverse edge, disposed between the ears 27.
  • This sleeve 28 has a central bore traversed by the axis 26.
  • a retaining lug 29 is provided at the rear of the plate 103 to cooperate with a stop provided on the rear face of the plate 102 and to keep the cassette 25 closed at rest, the spring 11 being prestressed by 1 mm.
  • the assembly is such that even when the cassette is not stressed by a load, the side walls 104, 105 and 106, 107 overlap along a range.
  • the plates 102 and 103 are made of a rigid plastic material, with a reduced coefficient of friction.
  • the space 118 located between the axis 26 and the spring 11 of the cassette 25 is free of material like the space 18 of FIG. 1.
  • This change of cassette makes it possible to best adapt the shoe to the requirements of use depending on whether the shoe will be used, for example, on a particular day for a walk or on another day for a course involving relatively frequent jumps.
  • the upper sole part can comprise the plate 2 described with reference to FIGS. 1 to 3, and which is represented in FIG. 6, while the lower sole part can comprise the plate 3, also represented in FIG. 6.
  • the faces external of the wings 104 and 105 of the plate 102 of the cassette are, practically, in contact with the internal faces of the wings 21, 22 of the plate 2.
  • the plates 102, 103 of the cassette are rigid, it is however possible to remove the rigid plates 2 and 3 from the sole of the shoe; in such a case, the upper sole part and the lower sole part are made entirely of a flexible material.
  • a shoe fitted with such a cassette works as explained above, and has the same advantages as those mentioned in connection with FIGS. 1 to 3.
  • a shoe C according to the invention can be of the city shoe type with a prominent heel 30, protruding downwards while the sole 201, flexible in particular in the zone 205 located under the metatarsus away from the ground from this area to the upper level of the heel at the back. There is therefore a free space 218 between the articulation zone 205 and the heel.
  • the rigid upper plate 202 has an area limited substantially to that of the heel. It extends to the rear of the shoe but, towards the front, is limited by a transverse edge 31 situated behind the articulation zone 205.
  • the plate 202 has, at its periphery, a substantially vertical wall 222 extending downward.
  • the lower plate 203 is also rigid and is mounted with a possibility of vertical translation relative to the plate 202. Lateral support and vertical guidance is ensured between the plates 202 and 203 by virtue of vertical walls 224 provided on the edges of the plate 203, and extending upwards, which cooperate with the wall 222.
  • transverse pins 32 projecting transversely inwards, from the side walls 224, these pins 32 being engaged in vertical oblong openings 33 provided in the wall 222 of the plate 202.
  • the pins 32 thus allow a relative oscillation between the plates 202 and 203 around a transverse axis and, moreover, a displacement in substantially vertical translation between these plates.
  • the spring 11 is disposed between the plate 202 and the plate 203, substantially vertical to the heel of the user, this spring 11 being held by any suitable means.
  • FIG. 9 shows an alternative embodiment of the city shoe of FIG. 7.
  • the rigid upper plate 302 is limited by a flange 331 which comes to surround a flange 34 of the lower plate 303.
  • the flanges 331 and 34 in their part transverse, have a shape curved, cylindrical, the horizontal axis of which is in the vicinity of the flexion region 305 of the sole.
  • the spring 11 is housed between the plates 302, 303, the extent of which is limited to the area of the heel. There is a free space 318 between the zone 305 and the heel, so that the foot is not in too great contact on the front of the cassette.
  • a sort of bellows 319 surrounds all of the plates 302, 303.
  • FIG. 10 illustrates a variant of a city shoe comprising, housed in the heel, a cassette 425, similar to the cassette of FIG. 5, but of shorter length.
  • the hinge pin 426 is located in the area of the front edge of the heel, the spring 11 being towards the rear.
  • the cassette 425 is disposed between an upper plate 402 and a rigid lower plate 403.
  • the assembly is surrounded by a sort of bellows 419. We find the flexion zone 405 at the level of the metatarsus and the free space 418.
  • Figures 11 and 12 illustrate another alternative embodiment of the heel of a shoe.
  • the rigid upper plate 502 is placed against the upper wall 35 of an envelope 36 integral with the sole and comprising a vertical peripheral wall 37 directed downwards.
  • the plate 502 is provided with a vertical rim 531 on its contour, with the exception of its front transverse edge.
  • the bottom plate 503 rigid, made of hard material like the plate 502, forms a sort of overturned cover with its rim 534 turned upwards, situated inside the wall 37 and the rim 531.
  • the plate 503 can move , substantially vertically, relative to the plate 502.
  • a stud 38 is provided projecting on each side, at the front and at the top of the longitudinal parts of the rim 534.
  • Each stud 38 is received in a vertical groove 39 provided on the internal wall rim 534, and closed down.
  • the plate 503 has at the rear, at the top of its rim, a lug 40 projecting rearwards, also received in a groove or window 41, closed downwards, from the rim 534.
  • the spring 11 is disposed between the plates 502 and 503 in a manner similar to that described above.
  • FIG. 13 shows a shoe whose sole has a cassette 625 a similar to the cassette 25 in FIG. 6, but moreover short, located in front of the metatarsus of the user's foot and arranged in the opposite direction.
  • the edge of the cassette 625 a is located slightly in front of the metatarsus, while the spring of the cassette 625 a is located under the toe of the shoe.
  • the vertical elastic stroke of the spring of the cassette 625 a is smaller than that of the spring associated with the heel; this stroke is, for example, 3 or 4 mm.
  • This cassette 625 a can be combined with a second cassette 625 b , arranged like the cassette 25 in FIGS. 5 and 6, that is to say with its edge forwards and its spring under the heel.
  • the cassette spring 625 b has a travel of 6 to 7 mm.
  • the cassette 625 a can be combined with a rear sole part similar to that of FIG. 1.
  • a shoe according to the invention remains simple to manufacture while ensuring good shock absorption of the heel on the ground with an optimal restitution of the energy stored during the impact.
  • the friction between the foot and the upper of the shoe, especially at the heel, is eliminated despite the elasticity introduced at the heel.

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
EP93400006A 1992-01-22 1993-01-05 Chaussure, en particulier chaussure de sport, comportant au moins un ressort disposé dans la semelle, cassette et ressort pour une telle chaussure Expired - Lifetime EP0552994B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9200644A FR2686233A1 (fr) 1992-01-22 1992-01-22 Chaussure, en particulier chaussure de sport, comportant au moins un ressort dispose dans la semelle, cassette et ressort pour une telle chaussure.
FR9200644 1992-01-22

Publications (2)

Publication Number Publication Date
EP0552994A1 EP0552994A1 (fr) 1993-07-28
EP0552994B1 true EP0552994B1 (fr) 1996-07-31

Family

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EP93400006A Expired - Lifetime EP0552994B1 (fr) 1992-01-22 1993-01-05 Chaussure, en particulier chaussure de sport, comportant au moins un ressort disposé dans la semelle, cassette et ressort pour une telle chaussure

Country Status (6)

Country Link
US (1) US5282325A (enrdf_load_stackoverflow)
EP (1) EP0552994B1 (enrdf_load_stackoverflow)
JP (1) JP3567218B2 (enrdf_load_stackoverflow)
DE (1) DE69303833T2 (enrdf_load_stackoverflow)
ES (1) ES2090894T3 (enrdf_load_stackoverflow)
FR (1) FR2686233A1 (enrdf_load_stackoverflow)

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US8347526B2 (en) 2009-04-10 2013-01-08 Athletic Propulsion Labs LLC Shoes, devices for shoes, and methods of using shoes
US8752306B2 (en) 2009-04-10 2014-06-17 Athletic Propulsion Labs LLC Shoes, devices for shoes, and methods of using shoes
US11484092B2 (en) 2020-07-15 2022-11-01 Athletic Propulsion Labs LLC Shoes, devices for shoes, and methods of using shoes
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US8347526B2 (en) 2009-04-10 2013-01-08 Athletic Propulsion Labs LLC Shoes, devices for shoes, and methods of using shoes
US8495825B2 (en) 2009-04-10 2013-07-30 Athletic Propulsion Labs LLC Forefoot catapult for athletic shoes
US8621766B2 (en) 2009-04-10 2014-01-07 Athletic Propulsion Labs LLC Shoes, devices for shoes, and methods of using shoes
US8112905B2 (en) 2009-04-10 2012-02-14 Athletic Propulsion Labs LLC Forefoot catapult for athletic shoes
US8752306B2 (en) 2009-04-10 2014-06-17 Athletic Propulsion Labs LLC Shoes, devices for shoes, and methods of using shoes
US9364044B2 (en) 2009-04-10 2016-06-14 Athletic Propulsion Labs LLC Shoes, devices for shoes, and methods of using shoes
US11039660B2 (en) 2009-04-10 2021-06-22 Athletic Propulsion Labs LLC Shoes, devices for shoes, and methods of using shoes
US11259592B2 (en) 2009-04-10 2022-03-01 Athletic Propulsion Labs LLC Shoes, devices for shoes, and methods of using shoes
US11484092B2 (en) 2020-07-15 2022-11-01 Athletic Propulsion Labs LLC Shoes, devices for shoes, and methods of using shoes
US11707109B2 (en) 2020-07-15 2023-07-25 Athletic Propulsion Labs LLC Shoes, devices for shoes, and methods of using shoes
US11576465B2 (en) 2021-05-18 2023-02-14 Athletic Propulsion Labs LLC Shoes, devices for shoes, and methods of using shoes
US11857027B2 (en) 2021-05-18 2024-01-02 Athletic Propulsion Labs LLC Shoes, devices for shoes, and methods of using shoes

Also Published As

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DE69303833T2 (de) 1997-02-06
FR2686233A1 (fr) 1993-07-23
JPH05293001A (ja) 1993-11-09
JP3567218B2 (ja) 2004-09-22
EP0552994A1 (fr) 1993-07-28
FR2686233B1 (enrdf_load_stackoverflow) 1995-04-28
DE69303833D1 (de) 1996-09-05
US5282325A (en) 1994-02-01
ES2090894T3 (es) 1996-10-16

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