EP0449981B1 - Schuh mit einer elastischen sohleneinlage - Google Patents

Schuh mit einer elastischen sohleneinlage Download PDF

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Publication number
EP0449981B1
EP0449981B1 EP90901966A EP90901966A EP0449981B1 EP 0449981 B1 EP0449981 B1 EP 0449981B1 EP 90901966 A EP90901966 A EP 90901966A EP 90901966 A EP90901966 A EP 90901966A EP 0449981 B1 EP0449981 B1 EP 0449981B1
Authority
EP
European Patent Office
Prior art keywords
insert
shoe
leaf
sole
outer ring
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
EP90901966A
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English (en)
French (fr)
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EP0449981A1 (de
EP0449981A4 (en
Inventor
Jerry Dr. Schindler
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.)
SCHINDLER, JERRY, DR.
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0449981A1 publication Critical patent/EP0449981A1/de
Publication of EP0449981A4 publication Critical patent/EP0449981A4/en
Application granted granted Critical
Publication of EP0449981B1 publication Critical patent/EP0449981B1/de
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
    • 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
    • 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

Definitions

  • the present invention relates to the field of footwear and particularly to footwear having an elastic sole insert.
  • coil springs of conventional design are difficult to retain as their free ends cause load concentrations requiring rigid retainer plates as reinforcement structures, as shown in U.S. Patent 2,668,374.
  • U.S. Patent, 4,267,648 suggests several alternatives to coil springs, such as flat disk springs and belleville washer springs. In order to maintain a low profile, a large number of small springs are utilized.
  • a shoe is provided with a plate located inside the shoe and located in the area of the heel of the wearer.
  • the plate is hinged to the shoe at its forward end and springs are trapped between the plate and the sole.
  • the springs may be in the form of a pair of comb-like parts with interdigitated fingers, the springs being riveted to the plate and the fingers contacting the sole below the plate. Spring action in this case involves the foot moving within the envelope formed by the upper part of the shoe and may result in the foot being rubbed by the laterial of the shoe upper. In addition, the springs also rub on the inside of the sole during the spring movement.
  • a feature of the present invention is that the insert has a large diameter relative to its height and presents a large load bearing surface.
  • An advantage of the present invention is the elastic insert is relatively easy to retain within the shoe, and has a relatively low weight and size when compared to prior art devices having comparable energy storage capacity.
  • a shoe to be worn on the foot of a person comprises a generally planar sole member having an exterior and interior surface, an original height (h) and a peripheral edge; an upper member affixed to the sole periphery to generally surround the foot of the wearer; an insole conforming with the sole interior surface for cooperation with the foot; an elastic insert oriented between the sole interior surface and the insole and arranged to elastically deform along an axis generally perpendicular to the sole member, and characterised in that said insert is provided with a continuous generally planar outer ring having a cut-out region formed therein defining a leaf projecting in a free state out of the plane of the ring, said leaf elastically deflecting towards said plane and the sole member being compressed upon the exertion of a load along said axis, and the leaf returning when the sole member expands to its original height.
  • Figures 1-5 show a first embodiment of the elastic insert 20 shown in an athletic shoe 22.
  • the elastic insert 20 consists of upper and lower elements 24 and 26 shown in Figure 4 oriented in stacked alignment along a common axis.
  • Upper and lower elements 24 and 26 are substantially identical to one another and are centrally attached to one another using a rivet 28 or the like which acts as a fastener means for attaching the upper and lower elements together.
  • Each of the upper and lower elements are formed of an elastically deformable material such as a spring steel sheet or the like.
  • Each element has a continuous and generally planar outer ring 30 having a cutout region 32 formed therein which defines a leaf 34.
  • the leaf extends inwardly from the outer ring 30 and is preferably of a spiral shape, as shown in the Figure 1 plan view.
  • the leaf terminates in an enlarged boss 36 having a central hole 38 for receiving rivet 28.
  • outer ring 30 is generally planar.
  • Leaf 34 projects out of the plane of the ring in the free state.
  • the sheet material forming the element 26 has a thickness T, and the element has a free height H as shown.
  • the maximum deflection is the difference between the free height H and thickness T.
  • the elastic element may be compressed repeatedly from its free height to the totally flat position without fatigue.
  • Leaf 34 acts as a cantilever beam fixed at one end and loaded at the other.
  • the leaf is affixed to the outer ring and extends inwardly therefrom.
  • the leaf has an uniform thickness T and a varying width.
  • the leaf width is greatest adjacent the outer ring 30, and tapers to a minimum width adjacent the central boss 36.
  • the spiral design causes the leaf to be loaded in torsion, as well as simply in sheer and bending, as would be the case in a straight beam cantileveredly affixed to a rigid body at one end.
  • the elastic insert is made up of an upper and lower element as shown in Figure 4, the free height, compressed thickness, and useful range will be twice that of the single element.
  • Shoe 22 is made up of a sole member 40, an upper member 42 and an insole 44.
  • Sole 40 has an exterior surface 46 and an interior surface 48.
  • the upper member 42 is affixed to the periphery of the sole and generally surrounds the foot of the wearer in a conventional manner.
  • Insole 44 conforms to the sole interior surface and cooperates with the foot of the shoe wearer in a typical fashion.
  • a cavity 50 Between the sole interior and the insole is a cavity 50 in which the elastic insert 20 is installed.
  • leaf 34 will elastically deflect toward the plane of the outer ring.
  • the load exerted upon the insert will cause the insert to compress and expand, storing and releasing energy.
  • a thin insole reinforcement 52 is provided to prevent the soft foam insole 44 from deforming into the element cutout region 32.
  • the elastic insert is particularly beneficial in an athletic shoe used in jumping sports, such as basketball and volleyball.
  • the inserts are also helpful in running shoes.
  • the load is transmitted from the wearer's foot to the ground through the shoe sole.
  • the sole is compressed during initiation of the jump and expands to the original height once the shoe is separated from the ground.
  • a typical shoe sole is relatively inelastic and is very inefficient at releasing energy during the jumping maneuver do to high hysteresis.
  • Inserts of a present size are very elastic with relatively little hysteresis thereby releasing the maximum amount of energy during a jumping maneuver.
  • each shoe is provided with two elastic inserts, as shown in Figures 3 and 5.
  • One insert 20 located in the shoe sole adjacent the wearer's heel and the other insert 20' oriented below the ball of the wearer's foot.
  • Too soft of an insert will not store the maximum amount of energy, therefore limiting the beneficial effect of the insert and possibly resulting in excess of deformation during normal walking. While ideally the insert spring rate would be specifically selected for each wearer considering the wearer's weight and athletic ability, commercial shoes having permanently installed inserts can be made with regular or stiff inserts. Spring rate of the inserts would also vary as a function of shoe size.
  • ball and heel elastic elements should have a substantially equal geometry and spring rate. It should be recognized that the heel and ball spring rates can be varied as desired depending upon the expected use of the shoe. It should also be appreciated that only a single insert may be used in certain circumstances. For example, a long-distance running shoe may utilize a heel insert only while the sprinter's shoe may utilize a ball insert only.
  • a second embodiment 60 of the elastic insert is shown in Figures 6-8.
  • the insert is formed of a rectangular sheet 62 having a cutout 64 formed therein which should define a continuous outer ring 66 and a plurality of leaves 68,68',68'',68'' projecting inwardly from the outer ring 66.
  • the insert is preferably made up of upper and lower elements 70,72 as shown in Figure 7.
  • the outer ring 66 of each element is generally planar and parallel to the shoe sole.
  • the element is elastically deflectable along an axis generally perpendicular to the shoe sole.
  • the leaves of each element project out of the plane of the ring in the free state as shown in Figure 7 and cooperate with the corresponding leaf in the other element.
  • the ends of the leaves are locally parallel to the opposing leaf, as shown.
  • the leaves of the upper and lower element are fastened together using a suitable fastener such as a rivet or the like.
  • the elastic element has a fully compressed height equal to two times the sheet thickness T, and the leaves are generally tapered having a width greatest adjacent the outer ring.
  • a third embodiment of the elastic insert 76 is shown in Figure 9.
  • the difference between insert 76 and insert 60 is web 78 which extends across the insert connecting on opposite of the element outer ring. It should be appreciated that a wide variety of leaf configurations can be constructed by cutting one or more cutouts of various shapes to suit the desired application.
  • insert 80 is made up of upper and lower elements in a similar fashion as the earlier embodiments described. Insert 80 is similar in appearance to insert 20 shown in Figures 1 and 2.
  • a first and a second cutout region 82 and 84 is formed in the elastic insert to define a generally spiral shaped leaf 86 affixed at both ends to continuous outer ring 88.
  • the leaf has a central boss 90 and a hole 92 provided therein for attachment of a rivet or the like. The leaf is widest at the outer ring 88, and becomes narrowest at the attachment to the boss 90.
  • the elastic insert 80 exhibits significantly different load versus deflection characteristics than previously described elastic inserts utilizing leafs of cantilever design.
  • Leafs of a cantilever design have a fairly linear load versus deflection curve as shown on line 94 in Figure 12.
  • a non-linear load versus deflection curve is preferred and which has an initially steep slope and a very low slope high deflection.
  • the elastic insert 80 combines the load versus deflection characteristics of the cantilevered spring shown in curve 94 with that of a dome spring or belleville washer represented by curve 96 to achieve the load versus deflection curve represented by line 98.
  • Figure 13 shows a schematic representation of a cantilevered beam affixed at one end and load at the other.
  • Beam 100 has a length l.
  • force F is exerted on the free end of the beam, the free end deflects a distance d.
  • Force F is exerted on the end of the beam causes an equal and opposite reaction force F R at the wall attachment. Force F also causes a bending moment M o to be exerted at the wall attachment, where M o equals Fl.
  • the leaves are generally tapered, being widest adjacent the outer ring, and narrowest adjacent the loading point.
  • This tapered leaf design results in a substantially uniform stress distribution.
  • Beam 68 in insert 60 shown in Figure 6 acts like a classical cantilever beam as shown in Figure 13, with the exception that its width and moment of inertia varies as a function of length.
  • the beam is loaded in both the bending and sheer modes.
  • the spiral leaf design incorporated in insert 26 is also loaded in torsion.
  • the relative magnitude of the bending in the torsional load varies throughout the beam length as a function of geometry. In the embodiment of the insert shown in Figure 1, over two-thirds of the energy is stored in the spring as a result of torsional deformation.
  • insert 80 in addition to sheer bending and torsion, the beam is also loaded in axial compression.
  • the leaf will have a generally rectangular cross-sectional area having a width substantially greater than its thickness.
  • the rectangle shape enables the polar moment inertia of the leaf cross-section to be maximized to better resist torsion in the spiral insert designs shown in Figures 1 and 10.
  • the elastic inserts in the preferred embodiment can be fabricated of high quality spring steel, such as SAE 9254, SAE 1074 or equivalent, but it should be appreciated that other materials could be used. Common spring materials and their properties are listed in Mark's Standard Handbook for Mechanical Engineering, 8th Edition, pages 8-78, which is incorporated by reference herein. Other material, such as titanium sheet or molded fiber reinforced composites, could also be used in applications where weight is critical.
  • flat plate stock such as spring steel stock having the appropriate thickness is selected. While the steel is in the annealed state, it is cut to the desired plan view using a milling or stamping operation. Preferably, the insert is de-burred to remove sharp corners. The leaf is then plastically deformed out of the plane of the outer ring to achieve the desired free height. The elastic insert element is then heat treated using a conventional quenching techniques to harden the spring. In the preferred embodiment where the elastic insert is made up of a pair of elements, the two elements are axially aligned with their leaves engaging one another and fastened together using a rivet or the like.

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Claims (8)

  1. Ein am Fuß einer Person zu tragender Schuh, enthaltend ein im wesentlichen ebenes Sohlenteil (40) mit einer äußeren und einer inneren Oberfläche (46 bzw. 48), einer ursprünglichen Höhe (h) und einer Umfangskante; einen oberen Abschnitt (24), der am Sohlenumfang befestigt ist und im wesentlichen den Fuß des Trägers umgibt; eine Innensohle (44), die mit der inneren Oberfläche (48) der Sohle zum Zusammenwirken mit dem Fuß zusammenpaßt; und einem elastischen Einsatz (20), der zwischen der inneren Oberfläche der Sohle und der Innensohle ausgerichtet und so angeordnet ist, daß er sich längs einer im wesentlichen rechtwinklig zum Sohlenteil verlaufenden Achse elastisch verformt, dadurch gekennzeichnet, daß der Einsatz (20) mit einem durchgehenden, im wesentlichen ebenen äußeren Ring (30) versehen ist, in dem ein ausgeschnittener Bereich (32) ausgebildet ist, der die Form eines Blattes (34) bestimmt, das frei aus der Ebene des Rings herausragt, wobei sich das Blatt unter der Einwirkung einer Last elastisch zur Ringebene hin verbiegt und das Sohlenteil (40) längs der Einsatzachse komprimiert wird, und wobei das Blatt sich wieder zurückbiegt, wenn das Sohlenteil seine ursprüngliche Höhe (h) wieder erreicht.
  2. Schuh nach Anspruch 1, wobei der elastische Einsatz weiterhin ein oberes (24) und ein unteres (26) Element enthält, die in Achsrichtung übereinander ausgerichtet sind, wobei jedes Element mit dem durchgehenden, im wesentlichen ebenen äußeren Ring (30) versehen ist, in dem der ausgeschnittene Bereich ausgebildet ist, der die Form des Blattes (34) bestimmt, das aus der Ebene des betreffenden Rings frei herausragt, wobei die Blätter in Richtung aufeinander hervorstehen und miteinander zusammenwirken.
  3. Schuh nach Anspruch 2, wobei der Einsatz weiterhin eine Befestigungseinrichtung (38) zur Befestigung der Blätter des oberen und des unteren Elements aneinander enthält.
  4. Schuh nach Anspruch 2 oder 3, wobei der äußere Ring im wesentlichen kreisförmig ist.
  5. Schuh nach einem der Ansprüche 1 bis 4, wobei das Einsatzblatt im wesentlichen spiralförmig ist.
  6. Schuh nach einem der vorangegangenen Ansprüche, enthaltend zwei elastische Einsätze, insbesondere einen Balleneinsatz, der im wesentlichen unter dem Fußballen des Schuhträgers liegt, und einen Ferseneinsatz, der im wesentlichen unter der Ferse des Schuhträgers liegt.
  7. Schuh nach Anspruch 1 oder 2, wobei der Einsatz einen durchlaufenden Ring (66) und eine Mehrzahl von Blättern (68, 68') enthält, die innerhalb des Rings vorstehen, und wobei sich jedes Blatt, gerechnet längs einer Dimension des Einsatzes, in der entgegengesetzten Richtung quer zu dieser Dimension zum angrenzenden Blatt bzw. den angrenzenden Blättern erstreckt.
  8. Schuh nach einem der Ansprüche 1 bis 6, wobei das eine bzw. jedes vorhandene Einsatzelement einen durchlaufenden äußeren Ring (88) und ein Paar von ausgeschnittenen Bereichen (82, 84) enthält, die die Form des Spiralblatts bestimmen.
EP90901966A 1988-12-21 1989-12-21 Schuh mit einer elastischen sohleneinlage Expired - Lifetime EP0449981B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US28745888A 1988-12-21 1988-12-21
US287458 1988-12-21
PCT/US1989/005759 WO1990006700A1 (en) 1988-12-21 1989-12-21 Shoe and elastic sole insert therefor

Publications (3)

Publication Number Publication Date
EP0449981A1 EP0449981A1 (de) 1991-10-09
EP0449981A4 EP0449981A4 (en) 1991-11-13
EP0449981B1 true EP0449981B1 (de) 1995-08-30

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Application Number Title Priority Date Filing Date
EP90901966A Expired - Lifetime EP0449981B1 (de) 1988-12-21 1989-12-21 Schuh mit einer elastischen sohleneinlage

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EP (1) EP0449981B1 (de)
KR (1) KR910700010A (de)
AT (1) ATE126976T1 (de)
CA (1) CA2006299A1 (de)
DE (1) DE68924074D1 (de)
WO (1) WO1990006700A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5692323A (en) * 1993-01-26 1997-12-02 Rotasole Pty. Ltd. Footwear with auto-returning turntable
EP0682482A4 (de) * 1993-01-26 1996-08-21 Jack Coldberg Schuh mit zurückgesetzter sohle.
AUPO510597A0 (en) * 1997-02-14 1997-04-11 Miers, David John Energy-storing device
US20040031169A1 (en) * 2001-09-28 2004-02-19 Jensen Jeffrey L. Neuropathic foot protector
KR100832471B1 (ko) * 2006-04-04 2008-05-27 삼성전자주식회사 압축 스프링 및 이를 구비한 터치식 스위치
US9226843B2 (en) 2011-01-18 2016-01-05 Medefficiency, Inc. Systems and methods for limb support
CN113729354B (zh) * 2021-09-22 2023-03-28 泉州鸿荣轻工有限公司 一种运动记忆型储能高弹运动鞋底及其制备工艺

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB105409A (en) * 1916-04-13 1917-04-13 Huon Arthur Matear A New or Improved Shock-absorber for use in Boots or Shoes.
GB608180A (en) * 1945-08-24 1948-09-10 John Hilton Improvements relating to footwear
US2668374A (en) * 1951-03-14 1954-02-09 Seigle William Spring cushioning insole
US2947529A (en) * 1957-12-03 1960-08-02 Bell & Howell Co Disc-type suspension spring
NL268232A (de) * 1961-08-15
US3602490A (en) * 1969-09-24 1971-08-31 Mandrel Industries Seismometer spring
BE757025A (fr) * 1969-10-04 1971-04-05 Deres Dev Corp Dispositif de support mecanique
US4457084A (en) * 1981-04-08 1984-07-03 Hiroshi Horibata Hopping and dancing shoes
US4685094A (en) * 1984-11-30 1987-08-04 Geosource Inc. Lateral compliance device for geophone springs

Also Published As

Publication number Publication date
EP0449981A1 (de) 1991-10-09
CA2006299A1 (en) 1990-06-21
ATE126976T1 (de) 1995-09-15
KR910700010A (ko) 1991-03-13
WO1990006700A1 (en) 1990-06-28
DE68924074D1 (de) 1995-10-05
EP0449981A4 (en) 1991-11-13

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