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WO1996004811A1 - Chaussure - Google Patents

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Info

Publication number
WO1996004811A1
WO1996004811A1 PCT/US1994/010118 US9410118W WO9604811A1 WO 1996004811 A1 WO1996004811 A1 WO 1996004811A1 US 9410118 W US9410118 W US 9410118W WO 9604811 A1 WO9604811 A1 WO 9604811A1
Authority
WO
WIPO (PCT)
Prior art keywords
outsole
stiffener
footwear
area
midsole
Prior art date
Application number
PCT/US1994/010118
Other languages
English (en)
Inventor
George C. Brown
John M. Connelly
Menno Van Wyk
Larry G. Selbiger
David Hill
Al Gross
Original Assignee
One Sport, Inc.
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 One Sport, Inc. filed Critical One Sport, Inc.
Priority to AU78319/94A priority Critical patent/AU7831994A/en
Publication of WO1996004811A1 publication Critical patent/WO1996004811A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B5/00—Footwear for sporting purposes
    • A43B5/002—Mountain boots or shoes
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/12—Soles with several layers of different materials

Definitions

  • the present invention relates generally to the field of footwear and more particularly, in many aspects, to footwear for use on uneven terrain.
  • Footwear for use on uneven terrain must provide sufficient traction and torsional rigidity to avoid ankle or knee discomfort or injury resulting from excessive pronation, supination or boot instability.
  • the shoe or boot must be rigid enough to avoid penetration by jagged rocks, pebbles, etc., and yet provide sufficient cushioning to attenuate and dissipate the ground reaction forces encountered in the heel and metatarsal areas of the foot when impacting the ground. This is particularly important in speed hiking or trail running, when the force with which the wearer impacts the ground may be as high as three to four times his or her body weight.
  • conventional hiking boots comprise a midsole 10 directly attached to a deeply lugged outsole 12.
  • the upper component of the boot 14 is shaped and sized to receive a wearer's foot, and is wrapped around a rigid, hard lasting board 16 prior to being cemented or stitched to the midsole/outsole unit.
  • Lasting board 16 is of uniform stiffness, generally underlies all areas of the foot, and is typically constructed of nylon or Texon board.
  • the boot may have a shank under the heel.
  • Cushioning is provided by midsole 10 and sockliner 18, which is placed on top of lasting board 16 and contacts the wearer's foot.
  • Sockliner 18 is typically constructed of ethylvinyl acetate (EVA) or polyurethane foam.
  • EVA ethylvinyl acetate
  • Conventional hiking boots are therefore both heavy and uncomfortable to wear.
  • An objective of the present invention is therefore to provide footwear which reduces muscle fatigue and the occurrence of ankle and knee injuries when hiking or running on uneven terrain.
  • a further objective of the present invention is to provide footwear having both high torsional rigidity and forefoot flexibility.
  • Another objective of the present invention is to provide footwear suitable for trail use with sufficient cushioning to attenuate and dissipate the ground reactive forces generated during speed hiking or running.
  • Yet a further objective of the present invention is to provide footwear that demonstrates a high degree of compliance with uneven terrain, thereby providing good traction and cornering.
  • An additional objective of the present invention is to provide such footwear that is lightweight, comfortable to wear, and can be manufactured for a moderate cost.
  • a lightweight stiffener between the midsole and the outsole of the shoe or boot, and providing an outsole that interacts with the stiffener to provide a self-levelling feature.
  • the placement of the stiffener between the outsole and midsole provides the torsional rigidity and heel support required for use on uneven terrain without compromising the cushioning provided by the midsole. Elimination of the stiff and heavy lasting board used in conventional hiking boots additionally leads to reduced weight.
  • the stiffener is preferably constructed of a hard, semi-rigid material, such as a plastic material, and most preferably nylon 6, nylon 66, fiberglass, carbon fiber or some amalgam thereof.
  • the stiffener has graduated rigidity along its longitudinal axis, with the heel area being more rigid than the metatarsal area, thereby providing greater flexibility in the forefoot area. This is preferably achieved by varying the thickness of the stiffener, with the heel area being thicker than the metatarsal area.
  • graduated rigidity can also be accomplished by other methods, such as use of a composite material.
  • Forefoot flexibility may also be provided by means of a series of perforations or slots located in the metatarsal region of the stiffener and oriented generally perpendicular to the longitudinal axis of the boot.
  • the stiffener preferably has medial and lateral flanges in the central or arch area of the shoe or boot to provide additional support and permit use of a lighter weight outsole.
  • the outsole of the boot comprises a multiplicity of deep cut lugs, or active tread elements, attached to a thin rubber membrane.
  • the stiffener is cut away in the area of the lugs located on the rear, or heel, of the outsole, to enable each lug to telescope upward into the midsole.
  • Each of the rear, or outrigger, lugs is thus able to comply with the uneven terrain in an independent manner, much like the independent suspension system in high performance automobiles. This enhances the ability of the shoe or boot to corner and provide traction on angled and uneven surfaces.
  • the midsole of the boot or shoe of the present invention is constructed of two or more materials having different hardness or rigidity, preferably dual density foam.
  • the bottom layer of the midsole comprises a softer, lower density material and is in contact with both the stiffener and the outrigger lugs on the outsole, thereby improving the independent suspension and shock absorbing properties of the lugs.
  • the upper layer of the midsole is positioned closer to the sockliner and to the wearer's foot, further insulating the foot from shocks while improving cushioning and support .
  • the midsole is constructed of polyurethane (PU) with the bottom layer being constructed of PU having a durometer of about 60 to 65 and the upper layer constructed of PU having a durometer of about 25 to 40.
  • the upper component of the shoe or boot is constructed of a durable material such as leather, fabric (such as nylon, synthetic leathers, plastics, lycra, COOLMAXTM and/or neoprene) , other materials such as
  • the upper component is slip lasted, and then cemented to the platform formed by the outsole, stiffener and midsole to provide maximum flexibility at minimum weight.
  • the upper component may be slip lasted with a glued-in tuck board, and then cemented to the outsole/stiffener/midsole platform to provide some additional torsional stability at the cost of a slight weight gain. Techniques and materials for slip lasting which may be usefully employed with the present invention are well known in the art.
  • Figure 1 is an exploded view of a prior art boot having a lasting board positioned between the midsole and the sockliner.
  • Figure 2 is a schematic side view of a preferred shoe of the present invention.
  • Figure 3 is a schematic view of the lower surface of a preferred outsole of the present invention.
  • Figure 4 is a schematic cross-sectional view of a preferred outsole/stiffener/midsole platform of the present invention.
  • Figures 5A and 5B are schematic side and top views, respectively, of a preferred stiffener of the present invention.
  • Upper component 20 is shaped and sized to receive a wearer's foot, and has a toe area 22 at its front end and a heel area 24 at its rear end.
  • Upper component 20 may be constructed from a durable material, such as leather, fabrics or other materials, or a combination thereof, depending upon the desired characteristics of the shoe. Suitable fabrics include synthetic leathers, nylon, GORETEXTM, SY PATEXTM, COOLMAXTM, lycra and neoprene. Other materials for the construction of upper components of footwear are known in the art and may be usefully employed in the present invention.
  • Outsole 26 extends the length of the shoe between toe area 22 and heel area 24, and has a toe end 28 and a heel end 30.
  • Outsole 26 is constructed of material which provides good traction on uneven terrain in variable weather conditions, such as VIBRAMTM or, preferably, GOODYEAR INDY 500TM rubber.
  • outsole 26 is provided with a multiplicity of deep lugs 32, attached to and separated by a thin rubber membrane 34, preferably of approximately 1.5 mm thickness.
  • Suitable lugs 32 may be of various configurations and preferably project from both the lower and sidewall surfaces of outsole 26.
  • Heel projection 33 is provided to reinforce and stabilize the heel area. Lugs 32 are capable of moving independently from one another and from heel projection 33.
  • Outsole 26 is preferably provided with a plurality of V-shaped projections 35 in the center of the heel and forefoot areas between opposing lugs 32.
  • V- shaped projections 35 are positioned generally perpendicular to the antral longitudinal axis of outsole 26 and are of graduated size. As illustrated in Figure 3 V-shaped projections 35 in the heel area are arranged such that smaller projections are interposed between larger projections. In the forefoot area, a series of V-shaped projections is provided that is graduated in size, with the largest projection closest to toe end 28. Additional V-shaped projections may also be provided in the forefoot area and may be provided in conjunction with projections having other configurations, such as generally semispherical knobs 37.
  • outsole 26 is additionally provided with a plurality of generally semi ⁇ spherical knobs 37 in the metatarsal area and toe area 28 to provide good toe-off traction.
  • the plurality of knobs 37 may also be graduated in size and may be provided on both the lower surface and the sidewall of outside 26.
  • the heel sidewall of outsole 26 may be slightly rounded to enhance the stability of the shoe.
  • Stiffener 36 of the present invention extends along longitudinal axis of the shoe and is positioned between outsole 26 and midsole 48 as shown in Figure 4. The outsole, stiffener and midsole are joined together to form a platform typically using a cementing technique involving heat and pressure using techniques and materials well known in the art.
  • Stiffener 36 is constructed of a lightweight, semi-rigid and durable material, such as nylon 6, nylon 66, fiberglass or carbon fiber, or a combination thereof. Stiffener 36 preferably has varying properties of flexibility or rigidity along its longitudinal axis, providing greater flexibility in metatarsal area 40 than in heel area 38. According to a preferred embodiment, graduated flexibility is achieved by graduating the thickness of stiffener 36, with heel area 38 being thicker (preferably about 2.5 mm) and therefore more rigid, tapering to a thinner metatarsal area 40 (preferably about 1.5 mm thick) with proportionally more flex. Other means of providing a stiffener having different flexibility properties along its longitudinal axis, such as providing slots or perforations, using composite materials, and the like are well known in the art. A stiffener having graduated flexibility along its longitudinal axis, as described herein, may also be usefully employed with other kinds of footwear.
  • stiffener 36 is provided with a plurality of perforations or slots 42 in metatarsal area 40, each slot being oriented generally perpendicular to the longitudinal axis of the shoe. The exact number, size and pattern of the perforations is determined by the desired flexibility of the shoe.
  • stiffener 36 has one or more slots oriented generally perpendicular to the longitudinal axis of stiffener 36. According to a preferred embodiment, 2 or 3 slots may be provided, each being approximately 3.5 mm wide.
  • Both the medial and lateral sides of stiffener 36 are preferably provided with angled flange 44 in the central or arch section of the shoe, thereby providing increased support for the foot while enabling use of a lower weight outsole. Angled flanges 44 preferably project from opposing sides of the arch section at an angle of from about 110 to about 170 from the plane of the arch section.
  • Stiffener 36 is cut-away in the region immediately above lugs 32 in heel area 38 to form channels 45. Lugs 32 are thus able to telescope upwards between torsion bars 46 and into midsole 48 in an independent manner, thereby enhancing the ability of outsole 26 to comply with uneven terrain.
  • Midsole 48 is constructed of two materials having different rigidities, preferably dual density foam.
  • Upper layer 50 comprises a more rigid material, such as a harder, higher density foam
  • lower layer 52 comprises a less rigid material, such as a softer, lower density foam.
  • upper layer 50 is constructed of polyurethane having a durometer of about 25-40
  • lower layer 52 is constructed of polyurethane having a durometer of about 60-65.
  • Midsole 48 is preferably constructed, using a conventional 2-step mold process, of polyether polyurethane having a specific gravity of between about 0.25 to 0.30 in order to resist hydrolysis.
  • the dual-rigidity construction of midsole 48 provides support and cushioning without the need for a lasting board or a tuck board between the foot and midsole 48.
  • Sockliner 54 is located above midsole 48 and contacts the wearer's foot. Sockliner 54 is preferably removable and is constructed of EVA, polyurethane or other materials well known in the art.
  • upper shoe component 20 is preferably slip lasted by means of a conventional slip lasting process.
  • the slip lasting process (sometimes referred to as California lasting) involves the insertion of a last into a completely sewn upper, thus forcing the upper to assume the shape of the last. In effect, the fabric slip sock at the bottom of the upper takes the place of the lasting board. The upper is then cemented to the outsole/stiffener/midsole platform.
  • upper shoe component 20 may be slip lasted and cemented to the outsole/stiffener/midsole platform with the addition of a tuck board to the fabric slip sock at the bottom of the upper. This provides additional torsional rigidity but increases the weight of the shoe or boot slightly.
  • footwear of the present invention While the characteristics of the footwear of the present invention are particularly beneficial for hiking or running on uneven terrain, it is apparent that the footwear of the present invention may be usefully employed for other applications.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

L'invention concerne une chaussure basse ou montante possédant un cambrion (36) léger à rigidité graduée, situé entre la semelle extérieure (26) et la semelle intercalaire (48), afin d'opposer une certaine rigidité à la torsion et de procurer un support pour le talon. La semelle extérieure est pourvue de reliefs dans la zone du talon, lesquels s'escamotent indépendamment vers le haut dans la semelle intercalaire, augmentant ainsi la tenue dans les courbes ainsi que la traction sur terrain irrégulier.
PCT/US1994/010118 1994-08-12 1994-09-07 Chaussure WO1996004811A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU78319/94A AU7831994A (en) 1994-08-12 1994-09-07 Footwear

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US28989594A 1994-08-12 1994-08-12
US08/289,895 1994-08-12

Publications (1)

Publication Number Publication Date
WO1996004811A1 true WO1996004811A1 (fr) 1996-02-22

Family

ID=23113600

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1994/010118 WO1996004811A1 (fr) 1994-08-12 1994-09-07 Chaussure

Country Status (2)

Country Link
AU (1) AU7831994A (fr)
WO (1) WO1996004811A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998007341A3 (fr) * 1996-08-20 1998-06-04 Adidas Ag Chaussure ayant un support interne
EP1033088A1 (fr) 1999-03-02 2000-09-06 Salomon S.A. Chaussure avec semelage anti vibrations
US6412196B1 (en) 1999-03-26 2002-07-02 Alexander L. Gross Contoured platform and footwear made therefrom
US7647709B2 (en) 2005-05-19 2010-01-19 Danner, Inc. Footwear with a shank system
US20220264988A1 (en) * 2021-02-24 2022-08-25 Jianqiu Dong Foldable Slipper

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH246465A (fr) * 1945-10-02 1947-01-15 Soc D Rech Et D Applic Tech Chaussure.
CA867576A (en) * 1969-04-26 1971-04-06 Gardner Denys Skid-preventing footwear
GB2156653A (en) * 1982-02-10 1985-10-16 Colgate Palmolive Co Stiffening formation for athletic shoes
US4561195A (en) * 1982-12-28 1985-12-31 Mizuno Corporation Midsole assembly for an athletic shoe
EP0373336A1 (fr) * 1988-12-13 1990-06-20 Helmut Mayer Pièce d'insertion pour chaussure
EP0434076A2 (fr) * 1989-12-20 1991-06-26 Helmut Mayer Insert pour une chaussure
EP0548475A1 (fr) * 1991-12-24 1993-06-30 Salomon S.A. Semelle de chaussure de sport multicouche

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH246465A (fr) * 1945-10-02 1947-01-15 Soc D Rech Et D Applic Tech Chaussure.
CA867576A (en) * 1969-04-26 1971-04-06 Gardner Denys Skid-preventing footwear
GB2156653A (en) * 1982-02-10 1985-10-16 Colgate Palmolive Co Stiffening formation for athletic shoes
US4561195A (en) * 1982-12-28 1985-12-31 Mizuno Corporation Midsole assembly for an athletic shoe
EP0373336A1 (fr) * 1988-12-13 1990-06-20 Helmut Mayer Pièce d'insertion pour chaussure
EP0434076A2 (fr) * 1989-12-20 1991-06-26 Helmut Mayer Insert pour une chaussure
EP0548475A1 (fr) * 1991-12-24 1993-06-30 Salomon S.A. Semelle de chaussure de sport multicouche

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998007341A3 (fr) * 1996-08-20 1998-06-04 Adidas Ag Chaussure ayant un support interne
EP1033088A1 (fr) 1999-03-02 2000-09-06 Salomon S.A. Chaussure avec semelage anti vibrations
FR2790371A1 (fr) 1999-03-02 2000-09-08 Salomon Sa Chaussure avec semelage anti-vibrations
US6412196B1 (en) 1999-03-26 2002-07-02 Alexander L. Gross Contoured platform and footwear made therefrom
US7647709B2 (en) 2005-05-19 2010-01-19 Danner, Inc. Footwear with a shank system
US20220264988A1 (en) * 2021-02-24 2022-08-25 Jianqiu Dong Foldable Slipper

Also Published As

Publication number Publication date
AU7831994A (en) 1996-03-07

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