WO2004006709A1 - Shoe, especially a sports shoe, and method for producing the same - Google Patents

Shoe, especially a sports shoe, and method for producing the same Download PDF

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Publication number
WO2004006709A1
WO2004006709A1 PCT/EP2003/007501 EP0307501W WO2004006709A1 WO 2004006709 A1 WO2004006709 A1 WO 2004006709A1 EP 0307501 W EP0307501 W EP 0307501W WO 2004006709 A1 WO2004006709 A1 WO 2004006709A1
Authority
WO
WIPO (PCT)
Prior art keywords
spring
characterized
shoe according
sole
shoe
Prior art date
Application number
PCT/EP2003/007501
Other languages
German (de)
French (fr)
Inventor
Frank Volke
Werner Hasenstab
Original Assignee
Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V.
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
Priority to DE2002131882 priority Critical patent/DE10231882B4/en
Priority to DE10231882.4 priority
Application filed by Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V. filed Critical Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V.
Publication of WO2004006709A1 publication Critical patent/WO2004006709A1/en

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Classifications

    • AHUMAN NECESSITIES
    • A43FOOTWEAR
    • A43BCHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00Soles; Sole and heel units
    • A43B13/14Soles; Sole and heel units characterised by the constructive form
    • A43B13/18Resilient soles
    • A43B13/181Resiliency achieved by the structure of the sole
    • A43B13/182Helicoidal springs
    • AHUMAN NECESSITIES
    • A43FOOTWEAR
    • A43BCHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00Soles; Sole and heel units
    • A43B13/14Soles; Sole and heel units characterised by the constructive form
    • A43B13/18Resilient soles
    • A43B13/187Resiliency achieved by the features of the material, e.g. foam, non liquid materials

Abstract

The invention relates to a shoe, especially a sports shoe, comprising a sole provided with a damping system which has at least one spring element and by which means the forces acting on the sole can be at least partially absorbed. The inventive shoe is characterised in that the at least one spring element is embodied in the form of a linear slit spring or at least as a plate spring which contains at least one local camber.

Description

Shoe, in particular sports shoe, and to methods for manufacturing a shoe

technical field

The invention relates to a shoe, in particular work or sports shoe with a sole, exhibiting damping system is provided in which at least one spring element, are protected by the force acting on the sole force inputs at least partially absorbable. Further, a method of manufacturing such a shoe is described.

State of the art

In the design and manufacture of footwear, in particular of highly drawn down work and sport shoes, a main focus is on the specific investigation of mechanical loads that are caused by standing, walking and running motions and especially to in the foot and leg portion existing body parts act. To orthopedic injuries to joints, tendons, ligaments and bones that may occur through improper loading to prevent it is on and in the footwear to take effective measures to minimize missing or overloads at least.

In particular, it applies the high acceleration torques associated with each shock-like resting the foot on the ground to absorb possible to a large extent by the footwear itself. For this, the shoe sole that is responsible not only for the liability of the shoe on the ground, but essentially for the comfort and thus connected to the damping characteristics, while substantially.

For these reasons, great efforts at least the above-mentioned properties of shoe soles are made for many years to optimize under dynamic loads. Essentially, the development goals focus on further improvement in elasticity and damping characteristics of the shoe soles.

The elasticity of a shoe sole providing a reversible deformability of the sole, that the sole is short by an external force input or longer deformed. After discontinuation of the force entry, eg. During the pressure of the shoe from the ground, the stored by the deformation energy is delivered essentially no loss to the rotor again. The shoe sole moreover also has damping elements which are equally deformable, however, inherent in these components deformation energy is essentially irreversibly converted into heat and therefore can not be returned to the moving system.

Now has proven over the course of related investigations that the specific provision of the elasticity components determining cause unexpected complications within the shoe sole, which are closely connected to the special shapes and sizes choice and the nature, the structure and the arrangement of these components within the shoe sole , This seems to be the reason that nowadays mainly absorbing materials and components are used in most shoes used by the but lost for the movement of a runner acting on the shoe or the shoe sole forces.

Among the most common used in shoe soles damping materials are mainly plastics, gels or foams. Moreover, air chambers are so integrated in soles that are achieved by such an air cushion spring effect, whereby the elasticity of shoe soles can be improved slightly in high-quality sports shoes.

Also multi-layer soles are known which are equipped with so-called intermediate or midsoles with which a desired coordination between elasticity and cushioning in certain limited boundaries is possible.

Such soles have a, usually made of a foamed plastic material existing element having both elastic and damping properties. However, changes in the elastic properties arise with such soles, in their lifetime, a, whereby the elasticity of the foamed material decreases significantly. However, this means that the shoe is felt "soft", so even lost the foot support function and the risk of injury increases.

For this reason, several approaches are known to equip shoe soles with spring elements to influence the elastic properties positively and increase their service life.

In DE 41 22 086 A1 this purpose a device for the heel suspension and stabilization is described for a sports shoe, which provides a thin plate of the heel height, which is made of a composite material made of a thermoplastic resin and a carbon-glass fiber fabric. The plate has a front and a rear end and an integrally formed, rearwardly extending while sloping upward, acting in the vertical direction of the spring part. A problem with this proposed paragraph suspension, that a constant pressure point is set for the entire heel. The individual adjustment of the suspension to the geometry of the foot is not possible with this device. Furthermore, the device only provides a cushioning in the heel area. A recording of forces in the front boot area in which the forces particularly in faster running act above the plug on the foot is not reached by this suspension.

In WO 00/74515 A1 a shoe and a spring damping device for a shoe is further described. In the described shoe is a leaf spring device is provided between a sole and an insole, which extends in the direction of action of the insole to the sole. The leaf spring member is formed of a thermoplastic elastomer and has at least one friction portion on which rubs during a relative movement between the insole and the sole. Even with this damping means only the loss of a shoe in the heel area is again possible, since this device requires a relatively large construction that requires a lot of space in the shoe sole.

Notwithstanding the preceding damping systems 6,055,747 describes the US a damping system which is due to the use of helical springs also able to realize in the springs stored energy during a forward movement of the foot again into kinetic energy. For this purpose, located in the heel area of ​​the sole within a base plate, on which a plurality of coil springs is arranged. The springs are held between the base plate and an upper cover plate. However, provided when running shoes are very problematic with coil springs, since the distance between sole and foot bed by the relatively long spring travel and the resulting instability of the suspension shoe is a high risk of injury for the wearer. Also, give stocked with such coil springs shoes stored during compression impact energy virtually undiminished on the joints back. For this reason, the use of coil springs is completely ruled out, for example, running shoes.

In addition to the problems already described, all have springs previously used for damping in shoes on the disadvantage that they tire relatively quickly and guarantee especially in heavily used sports or running shoes soon the desired damping anymore.

Summary of the invention

Starting from the known state of the art, the invention has for its object to provide a shoe with an improved damping system in which a damping of shock loads is guaranteed and at the same time a part of the energy can be used for absorbing shocks for a more economical running movement of at least the. In addition, should be possible and the damping system characterized by extreme longevity, stability and load a user-specific optimization of the pressure points inside the shoe sole.

The solution of the underlying object of the invention is defined in claim. 1 Subject matter of claim 21 is a method of the invention for producing the shoe. advantageously the inventive idea further developing features are subject of the dependent claims and the description with reference to the embodiments can be seen.

The shoe according to the invention, in particular sports shoe, with a sole, in which there is at least one spring element exhibiting damping system is provided, are protected by the force acting on the sole force inputs at least partially absorbed, is characterized in that the at least one spring element in the manner of a linear slit spring or is formed of a plate spring, which has a local elevation within the plate spring portion via at least.

According to the invention it has been recognized that slotted springs, as they are mainly used in mechanical engineering and, for example, in EP 0318669 A1 are described, are particularly suitable for use in damping systems of shoes due to the linear attenuation characteristic of the stability and longevity. Thus, tests have shown that slot springs survive up to 4 million cycles without loss of mechanical linear response. In particular, this spring is characterized in that it is lightweight, durable, recyclable and easy to pour in rubber and / or plastic. Slotted springs, which are according to the invention proposed for use in footwear as a damping system each consist of a solid cylindrical base body which is provided with slots which are disposed transversely to the longitudinal axis of the cylindrical body and go out respectively via the center or longitudinal axis of the cylindrical body. In addition, the slit spring having preferably at least in the region of the slots and the disc areas lying therebetween coaxially with the longitudinal axis extending the longitudinal bore. This longitudinal bore through which the two axial end portions and has there expediently a smaller diameter.

Therefore preferably comprises a formed as a linear slit spring spring element comprises a cylindrical base body which has at least one oriented perpendicular to the cylinder center axis cross-sectional area along which runs at least one slot, which covers an area which is greater than one half the cross sectional area of ​​the cylindrical base body.

but it is also conceivable to integrate disc springs into the inventive damping system for a shoe instead of or in combination with the above linear slit spring as they emerge from DE 202 05 139 U1. The term used in the other "plate spring" refers to the spring arrangement described in the above publication DE 202 05 139 U1. Such plate springs are made from a flat material or shaped having curved or shaped areas in themselves, which are local elevations or recesses with respect to an imaginary plane through the plate spring. In a preferred embodiment, the plate spring in question is designed as a ring spring, ie it has a ring-shaped spring cross section. The annular spring material, it is based on the basis of metallic or based on fiber-reinforced material, has along the ring mold at least one, preferably three or more from the plane of the ring outstanding local ring curvatures, which rise respectively to the ring of curvature on both sides adjoining ring portions. Such a shaped plate spring is able to take at a minimum travel particularly directed perpendicular to the plane of the ring spring forces.

Such a plate spring, may be as shown above as an annular spring formed or provided as a plate spring having an arbitrary n-edged contour, is for integration into the invention designed according to the damping system, preferably between two abutment, eg. In the form of two robust layers or to position plates. It also lends itself to more of such plate springs protruding type over each other to stack in order to obtain in this way an individual Dämpfungscharaktersitik. In this way, it is possible to form a spring assembly of a plurality of stacked plate springs. Of course, it is also possible to arrange a plurality of such spring assemblies formed of plate springs within a shoe sole, with the arrangement of the spring packets directed to the anatomical shape of the foot. It is also conceivable, spring assemblies, which have different spring properties, such as spring stiffness divided by anatomical considerations within the shoe sole to arrange.

In order to achieve the best possible distribution of the forces acting on the shoe sole forces, including a plurality of slotted springs next to one another between an upper and a lower boundary plane, for example. By two shoe sole regions may be formed may be disposed. In this way, a damping system is implemented within the shoe sole.

Preferably, the includes at least one spring element is an adjusting unit, with which the spring stiffness is variable. In this way it is possible to adjust the damping characteristics of a shoe sole individually to the expected stress. The adjustment can be made for example by means of a tool which is brought into operative connection with the adjusting unit, or to an adjusting element which is fixedly connected to the adjustment unit. In another variation of the shoe according to the invention with damping system which is releasably incorporated at least one spring element within the sole. Thus, it is possible to replace the spring element when the load of the shoe changed for example by changing external influence.

Of course, it is also possible to provide a plurality of spring elements distributed over an area in the sole, especially in the heel area of ​​the sole to arrange. Preferably, the spring elements are divided into groups in this case, wherein in each case a group of at least one spring element is included and the spring elements have within a group on uniform spring properties. Preferably, the spring elements of different groups have different spring properties.

In another embodiment, a plurality of spring members in a carrier matrix is ​​disposed. The carrier matrix serves firstly to stabilize individual spring elements at least along a linear axis, and on the other to guarantee a certain two-dimensional arrangement of the linear slotted springs. Preferably, the carrier matrix is ​​in the form of a plate on which a plurality of recesses or protrusions is provided. the individual spring elements are inserted into the corresponding recesses or protrusions and be stabilized in this manner in their longitudinal spring axis.

Preferably, the spring elements has both its lower and its upper end with such a plate, so that the spring elements are enclosed between two plates.

Both the two support matrices enclosed spring elements as well as the formation in the form of a single equipped with spring elements support matrix are preferably configured as a module unit and readily implementable in a shoe sole. So it is possible to provide modular units with different spring properties, eg. Soft, medium, hard, which can be incorporated depending on the characteristics runners in a shoe. This simplifies and reduces the cost of production of sports shoes and / or work shoes have different damping and elasticity properties substantially.

In a further embodiment, at least the shoe sole on an engagement opening, through which the at least one spring element is integrated into the shoe sole. In this way it is ensured that the spring element, which is preferably made of metal, adjusted to the individual requirements and is also recyclable at a wear occurred. Unlike commonly used for shoe soles damping materials reuse of the damping system according to the invention is thus, for example, in another sport shoe problem.

Preferably, the spring element is arranged in a chamber within which it is surrounded by a gaseous, liquid and / or solid medium. The medium, which is located in the chamber and of which the spring element is surrounded, it may be an inert gas, such as argon or krypton or a gel-like fluid both. The chamber is in this case a cavity within the sole is. It is also possible to exchange also the filled in the chamber next to the medium spring element or the spring element according to the invention including the carrier matrix. Thus, another way, the damping system according to the invention for shoes has to be individually adapted to its user or to the specific demands of the insert.

In a specific embodiment, the cavity of a fluid-tight layer is lined, so that the entire medium may be changed at once at an exchange of the medium located in the chamber.

The spring element itself is preferably made of a recyclable material such as metal. but beyond that, it is also conceivable to manufacture the spring element from other materials to ensure the stability and durability of the spring element.

An inventive method of manufacturing a shoe with a sole, in which a least one spring element exhibiting damping system is provided, are protected by the force acting on the sole force inputs at least partially absorbed, is characterized in that the at least one spring element is molded into the sole. Preferably, a plurality of spring members in a support matrix are in this case initially be integrated, the carrier matrix together with the spring elements in a recess within the sole introduced and the support matrix together with the spring element molded with the sole.

Due to the modular construction of the damping system in the form of a carrier matrix are combined in the individually formed depending on the desired Dämpfungscharakeristik in their spring properties linear slotted springs and integrated, is a simple assembling a semifinished sole, in a shape adapted to the carrier matrix recess is provided with which damping module possible. Thus, for otherwise identical shoes with different damping and elasticity properties produced at low cost.

In this way it is possible sports shoes with User-specific Dämpfungsbzw. provide elasticity properties that is specifically targeted to the anatomy of his foot and simultaneously has pressure points that enable the user to an optimum force gentle and comfortable walking. But also in the field of work boots or safety shoes with additional protective elements, such as steel caps, insoles etc., is damping system Advantageously, the invention can be used.

Moreover, it is of course possible, for example for high-performance sports, individually design a shoe having active linear damping characteristics, on an athlete. Summary of the Invention

The invention is described below without limiting the general concept of the invention by means of embodiments with reference to the drawings. Show it:

Fig. 1 very schematic shoe support matrix and spring elements,

FIG. 2a slot spring made of a solid cylindrical body,

Fig. 2b plate spring stack,

Fig. 3 cross-section of a shoe sole with linear damping

Spring elements.

WAYS OF IMPLEMENTING THE INVENTION, INDUSTRIAL APPLICABILITY

Fig. 1 shows highly schematically a sports shoe with a sole way in which a carrier matrix T is used with a plurality of linear slit S springs. The carrier matrix T is encapsulated in a rubber compound in the form of the sole.

Fig. 2a shows a typical linear spring slot S which is used as a spring element for the integrable in an athletic shoe cushioning system. The spring slot S consists of a solid cylindrical body and is pierced with slits 1 which are arranged transverse to the longitudinal axis of the cylindrical body and extend beyond the middle or the longitudinal axis of the cylindrical body. At the level of the individual slots 1 remain webs 2 which are arranged asymmetrically over the entire length of the slit spring. These webs 2 ensure the transmission of power from the upper to the lower end of the spring. In the range of the slots 1 and the disc regions in between the spring slot can be regarded as a hollow cylinder. In this area of ​​the body thus has a longitudinal axis extending coaxially to the longitudinal bore 3. The upper and the lower end portion of the slot serves as a stop spring, via which a force is transmitted to the lying above or below the sole area.

In FIG. 2b, a spring package is shown, which consists of three vertically stacked plate springs 4. Of course, each plate spring 4 already has in itself an effective spring force, so that in a simple embodiment, the provision of a single plate spring would suffice. However, reference 2b is taken to illustrate a combination of a plurality of plate springs to the embodiment in FIG.

For convenience of illustration, the three plate springs 4 are arranged slightly apart from each other between two layers robust. 8 and 9 The latter serve as a preferred mechanical counter-bearing, but which need not be necessarily provided individually for each spring pile. As the embodiment gem. is Fig. 2c show also a plurality of such spring stack between such layers 8 and 9 can be placed.

Each of the three plate springs 4 shown is designed as an annular spring and has three in a common plane just formed annular spring portions 5 on. The individual annular spring portions 5 are defined by curves representing elevations 6 in relation to the common plane. In the illustrated case, the three plate springs 4 are arranged such that their peaks 6 come to lie in each case vertically above the flat annular spring portions 5 of the respective lower or upper plate spring. Of course, deviating stack arrangements are conceivable, for example. A contour covering arrangement of the plate springs.

Notwithstanding the specific embodiment of the plate springs shown in Figure 2b, in principle, a three four or n-angular cross-section are also suitable spring plate springs with a different form of the ring spring cross-section, eg., With or without internal cutouts. For the mutual connection of the plate springs 4 in the illustrated stack-shaped arrangement local joints, which serve for example., By means of material closure, for example compounds. By means of adhesive or welding technique can be realized. The overall height or the spring characteristics of such a spring assembly can be adjusted to any of Hinzu- or removal of further plate springs.

In Fig. 2c, a spring arrangement 7 is illustrated, which is characterized in that it has an upper 8 and a lower plate 9. Between the plates 8, 9, a plurality of spring elements (10) of the aforementioned type are inserted. A force acts on the upper plate 8, which is for example designed as a support matrix and integrated into the heel of a shoe, the force is distributed over a plurality of spring elements. In this way it is also possible to take an angle on the spring elements acting forces.

Fig. 3 shows a top view of a plurality of spring elements 10 which are arranged flat so distributed in the sole. By this arrangement of the spring elements 10, it is possible to adjust the required by the user pressure point individually in the shoe.

LIST OF REFERENCE NUMBERS

1 slots

2 webs

3 longitudinal bore

4 Diaphragm

5 Flush ring spring section

6 overshoot

7 spring assembly

8 Top plate

9 Lower plate

10 spring element

as sole

S slot spring

T support matrix

Claims

claims
1. Shoe, in particular sports shoe, with a sole (So) in which a least one spring element (10) exhibiting damping system is provided, acting through to the sole (So) force inputs are at least partially absorbable, characterized in that the at least one is formed spring element (10) in the manner of a linear slit spring (S) or at least as a plate spring (4), which has at least one local elevation (6) within the plate spring portion is formed.
2. Shoe according to claim 1, characterized in that as a linear slit spring (S) formed spring element has a cylindrical base body which has at least one oriented perpendicular to the cylinder center axis cross-sectional area along the at least one slot (1), which covers an area which is greater than one half the cross-sectional area of ​​the cylindrical base body.
includes 3. Shoe according to claim 1, characterized in that the plate spring (4) is formed as a disk-like sheet and along its surface regions, at least one elevation (6), which rises above an imaginary surface plane.
4. Shoe according to one of claims 1 to 3, characterized in that the at least one spring element (10) comprises an adjustment unit with which the spring stiffness is variable.
5. Shoe according to one of claims 1 to 4, characterized in that the at least one spring element (10) detachably fixed within the sole (So) is integrated.
6. Shoe according to claim 5, characterized in distributed (So) that a plurality of spring elements (10) surface in the sole, especially in the heel area of ​​the sole are arranged (So).
7. Shoe according to claim 6, characterized in that the spring elements (10) can be divided into groups, is included in each of which at least one spring element (10), that the spring elements (10) within a group on uniform spring characteristics and the spring elements of different have groups have different spring properties.
8. Shoe according to claim 6 or 7, characterized in that the plurality of spring elements (10) in a carrier matrix (T) is disposed.
9. Shoe according to claim 8, characterized in that the carrier matrix (T) of each individual spring element (10) at least stabilized along a linear axis.
10. Shoe according to claim 8 or 9, characterized in that the carrier matrix (T) is constructed as a modular unit and in the sole (So) is interchangeable implement.
11. Shoe according to one of claims 1 to 10, characterized in that in the sole (So) an engagement hole is provided at least, by which is interchangeable at least one spring element (10).
12. Shoe according to one of claims 1 to 11, characterized in that the at least one spring element (10) is arranged in a chamber and is surrounded within the chamber from a gaseous, liquid and / or solid medium.
13. Shoe according to claim 12, characterized in that the chamber is a hollow space inside the sole.
14. Shoe according to claim 13, characterized in that the cavity is lined with a fluid-tight layer.
15. Shoe according to claim 12, characterized in that the medium consists of rubber and / or plastic material.
16. Shoe according to one of claims 1 to 15, characterized in that the spring element (10) consists of a recyclable material, preferably metal.
17. Shoe according to claim 3, characterized in that the plate spring (4) is a spring element (10), which is described in DE 202 05 139 U1.
18. Shoe according to claim 3 or 17, characterized in that the plate spring (4) is designed as an annular spring and wenbisgtens a cant (6) along which the ring mold.
19. Shoe according to one of claims 3, 17 or 18, characterized in that the plate spring (4) is disc-shaped with circular or n-polygonal peripheral contour.
20. Shoe according to claim 19, characterized in that the plate spring provides one or no inner recess.
21. A method for producing the shoe according to any one of claims 1 to 20, characterized in that the at least one spring element (10) in the sole (So) is poured.
22. The method according to claim 21, characterized in that a plurality of spring elements (10) in a
Support matrix (T) is integrated, that the carrier matrix (T) together with the spring elements (10) in a recess within the sole (So) is introduced, and that the carrier matrix (T) together with the spring elements (10) with the sole is cast (So) ,
PCT/EP2003/007501 2002-07-12 2003-07-10 Shoe, especially a sports shoe, and method for producing the same WO2004006709A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE2002131882 DE10231882B4 (en) 2002-07-12 2002-07-12 Shoe, in particular sports shoe, and to methods for manufacturing a shoe
DE10231882.4 2002-07-12

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20030740452 EP1524924A1 (en) 2002-07-12 2003-07-10 Shoe, especially a sports shoe, and method for producing the same

Publications (1)

Publication Number Publication Date
WO2004006709A1 true WO2004006709A1 (en) 2004-01-22

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PCT/EP2003/007501 WO2004006709A1 (en) 2002-07-12 2003-07-10 Shoe, especially a sports shoe, and method for producing the same

Country Status (3)

Country Link
EP (1) EP1524924A1 (en)
DE (1) DE10231882B4 (en)
WO (1) WO2004006709A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20320091U1 (en) 2003-12-23 2005-05-12 Puma Aktiengesellschaft Rudolf Dassler Sport shoe

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4267648A (en) * 1979-09-19 1981-05-19 Weisz Vera C Shoe sole with low profile integral spring system
EP0318669A1 (en) 1987-12-01 1989-06-07 VMA-NC Mess- und Antriebstechnik GmbH Flexible coupling with spring discs
US4901987A (en) * 1988-05-03 1990-02-20 Smalley Steel Ring Company Crest-to-crest compression spring with circular flat shim ends
DE4122086A1 (en) 1990-07-05 1992-01-16 Gear L A Inc An apparatus for batch suspension and stabilization for a sports shoe
US5269081A (en) * 1992-05-01 1993-12-14 Gray Frank B Force monitoring shoe
US5353523A (en) * 1991-08-02 1994-10-11 Nike, Inc. Shoe with an improved midsole
US6055747A (en) 1999-04-29 2000-05-02 Lombardino; Thomas D. Shock absorption and energy return assembly for shoes
US6120880A (en) * 1995-03-23 2000-09-19 Crow; William R. Performance enhancing athletic shoe components and methods
WO2000074515A1 (en) 1999-06-08 2000-12-14 Ahrens Hans Joachim Shoe and spring-operated dampening system for a shoe
US20010049888A1 (en) * 1999-04-29 2001-12-13 Krafsur David S. Spring cushioned shoe
DE20205139U1 (en) 2002-04-02 2003-01-02 Hasenstab Werner Disk spring comprises a washer which has one or more curves and bearing areas

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2313646C3 (en) * 1973-03-19 1980-08-14 Ludwig 7403 Ammerbuch Sailer
DE29813203U1 (en) * 1998-07-24 1998-12-03 Kapitz Carl Heinz Shoe, boot, shoe sole or insole with integrated spring, spiral, ring or shaft as a protection device for damping or prevention of vibration

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4267648A (en) * 1979-09-19 1981-05-19 Weisz Vera C Shoe sole with low profile integral spring system
EP0318669A1 (en) 1987-12-01 1989-06-07 VMA-NC Mess- und Antriebstechnik GmbH Flexible coupling with spring discs
US4901987A (en) * 1988-05-03 1990-02-20 Smalley Steel Ring Company Crest-to-crest compression spring with circular flat shim ends
DE4122086A1 (en) 1990-07-05 1992-01-16 Gear L A Inc An apparatus for batch suspension and stabilization for a sports shoe
US5353523A (en) * 1991-08-02 1994-10-11 Nike, Inc. Shoe with an improved midsole
US5269081A (en) * 1992-05-01 1993-12-14 Gray Frank B Force monitoring shoe
US6120880A (en) * 1995-03-23 2000-09-19 Crow; William R. Performance enhancing athletic shoe components and methods
US6055747A (en) 1999-04-29 2000-05-02 Lombardino; Thomas D. Shock absorption and energy return assembly for shoes
US20010049888A1 (en) * 1999-04-29 2001-12-13 Krafsur David S. Spring cushioned shoe
WO2000074515A1 (en) 1999-06-08 2000-12-14 Ahrens Hans Joachim Shoe and spring-operated dampening system for a shoe
DE20205139U1 (en) 2002-04-02 2003-01-02 Hasenstab Werner Disk spring comprises a washer which has one or more curves and bearing areas

Also Published As

Publication number Publication date
DE10231882A1 (en) 2004-01-29
DE10231882B4 (en) 2004-07-22
EP1524924A1 (en) 2005-04-27

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