CA1323755C - Custom midsole - Google Patents
Custom midsoleInfo
- Publication number
- CA1323755C CA1323755C CA000549627A CA549627A CA1323755C CA 1323755 C CA1323755 C CA 1323755C CA 000549627 A CA000549627 A CA 000549627A CA 549627 A CA549627 A CA 549627A CA 1323755 C CA1323755 C CA 1323755C
- Authority
- CA
- Canada
- Prior art keywords
- insert
- midsole
- outsole
- peripheral portion
- peripheral
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
ABSTRACT
In accordance with the present invention there is provided a shoe. The shoe is comprised of a durable outsole having an outsole upper surface. A cushionable midsole is provided which is comprised of at least one peripheral portion and a separate insert. A lower surface of the peripheral portion is joined to the outsole upper surface, the at least one peripheral portion forming a receptacle for receiving the insert. A reinforcing layer is preferably provided which is joined to the outsole upper surface within the receptacle. The reinforcing layer is substantially thinner than the depth of the receptacle and provides torsional strength. The insert has a lower surface for contacting the reinforcing layer and a preselected cushionability. The insert is selected from among a plurality of like inserts having differing degrees of cushionability. The insert is selected according to the weight of the wearer. Finally, an upper is provided which is joined to the peripheral portion.
In accordance with the present invention there is provided a shoe. The shoe is comprised of a durable outsole having an outsole upper surface. A cushionable midsole is provided which is comprised of at least one peripheral portion and a separate insert. A lower surface of the peripheral portion is joined to the outsole upper surface, the at least one peripheral portion forming a receptacle for receiving the insert. A reinforcing layer is preferably provided which is joined to the outsole upper surface within the receptacle. The reinforcing layer is substantially thinner than the depth of the receptacle and provides torsional strength. The insert has a lower surface for contacting the reinforcing layer and a preselected cushionability. The insert is selected from among a plurality of like inserts having differing degrees of cushionability. The insert is selected according to the weight of the wearer. Finally, an upper is provided which is joined to the peripheral portion.
Description
!
13~3755 CUSTOM MIDSOLE
TECHNICAL FIELD OF THE INVENTION
This invention relates in general to athletic or other activewear shoes, and more particularly relates to shoes having custom midsoles.
BACKGROUND OF THE INVENTION
Athletic or other activewear shoes of a conventional construction generally have three or four separate parts. First, such shoes are provided with an outsole that is made of a durable material and that extends across the lower surface of the shoe. A midsole is joined to the outsole to provide a cushioning layer to the wearer's foot. Usually, an upper formed of leather, synthetics or other materials is joined to the midsole.
In many conventional structures, an insole is further provided for disposal between the midsole and the wearer's foot for additional cushioning.
The midsoles of these conventional constructions have two undesirable characteristics. First, they have the property of deforming over a large area of surface when a downward force is impressed on them. Second, the midsoles are affixed to the shoes and therefore customers can make no choice in the midsole's cushionability without selecting another shoe. Thus, conventional midsoles do not offer anything in the way of independent suspension or deformation of various areas thereof, and further are suited to only a particular weiqht class or cushionability preference of wearers.
Thus, a need exists in the industry for a midsole that has a plurality of cushioning elements, each demonstratin~ an individual suspension and deforming independently from the remaininq elements. Further, a need exists in the industry for midsoles that can be ~3237~
selected according to the weight or cushionability preference of the wearer.
4 13237~5 SUMMARY OF THE INVENTION
In accordance with one aspect of the invention there is provided a shoe, comprising: a durable outsole having an outsole upper surface; a cushionable midsole. comprising at least one cushionable peripheral portion and a separate removable insert, a lower surface of said peripheral portion being joined to said outsole upper surface, said at least one peripheral portion forming an orifice for receiving and laterally enclosing said insert; said insert having a preselected cushionability in that it is selected from a plurality of like inserts having differing degrees of cushionability and it is selected according to the weight of the wearer; and an upper joined to said peripheral portion.
In accordance with another aspect of the invention there is provided a midsole for disposal on an upper surface of an outsole, comprising: a removable insert of said midsole, and a peripheral member of said midsole disposed laterally outwardly of said removable insert; said peripheral member forming an orifice, said removable insert insertable through said orifice to be substantially adjacent to said upper surface of said outsole, said peripheral member permanently affixed to said upper surface of said outsole; said removable insert having a lower surface for disposal substantially adjacent to said upper surface of said ou~sole, a plurality of cushioning elements formed to fill at least a major portion of said lower surface, said elements each operable to cushionably deform and flatten responsive to a force having a component perpendicular to said lower sllrface at said element, each element operable to deform independently of the remaining elements.
In accordance with yet another aspect of the invention there is provided a sole construction for a shoe, comprising:
an outsole having an upper surface; a cushionable midsole comprising at least one cushionable peripheral portion and a separate removable insert, a lower surface of said peripheral portion being joined to said outsole upper surface, said at least one peripheral portion forming an orifice for receiving and laterally enclosing said insert; said insert having a `:
.~
5 13237~
preselected cushionability and being selected according to the weight or cushionability preference of the wearer from among a plurality of like inserts having differing degrees of cushionability.
In accordance with yet another aspect of the invention there is provided a method for fabricating a shoe, comprising:
joining an outsole to a cushionable peripheral member of a midsole to form an orifice for receiving and peripherally enclosing a removable insert of the midsole; joining an upper to the peripheral portion; selecting the insert from a plurality of like inserts having different cushionabilities, the selection being made according to the weight or cushionability preference of the wearer; and inserting the selected insert into the orifice.
6 13237~
BXIEF DESCRIPTION OF THE DRAWINGS
Various aspects of the invention and their advantages will be more completely understood by reference to the following Detailed Description in conjunction with the appended drawings in which:
EIGURE 1 is an isometric view of a shoe construction according to the invention as fitted with a custom midsole therefor, with parts broken away to show interior structure;
FIGURE 2 is a bottom isometric view of a preferred embodiment of a custom midsole insert of the invention;
FIGURE 3 i8 a longitudinal section taken substantially along line 3-3 of EIGURE l;
FIGURE 4 is a top isometric view of an alternate embodiment of a custom midsole insert according to the invention; and FIGURE 5 is a longitudinal section taken substantially along line 5-5 of FIGURE 4.
7 1323~55 DETAILED DESC~IPTION
Referring first to FIGURE 1, an isometric view of a preferred embodiment of a shoe construction according to the invention is shown. A custom midsole insert is indicated generally at lO. Insert lO is shown as fitted into an active wear shoe indicated generally at 12. While the illustrated shoe 12 is one designed for walking, the invention can also be employed in other types of athletic shoes, such as running, aerobics, or court shoes. The invention also has application in any circumstance where varying midsole cushionability is desired.
Shoe 12 is comprised of an outsole 14 that forms the wearing surface of the shoe. Outsole 14 is preferably constructed of a relatively durable, resilient material such as natural rubber. Outsole 14 has an exterior surface that is provid0d with a suitable tread surface 16.
Outsole 14 further has an interior or upper surface 18.
Upper surface 18 may be smooth and featureless throughout, or may have a central area 20 that is reticulated or webbed in order to save weight. A peripheral area (not shown) of upper surface 18 presents a smooth surface or gluing or other means of attachment.
A peripheral midsole member 22 is formed to be glued or otherwise attached to the peripheral area of outsole upper surface 18. Peripheral member 22 is more cushionable and yieldable than outsole 14, and can be conveniently molded of polyurethane foam or ethylene vinyl acet~ee copolymer (EVA). Per~pheral member ~ ls in the 8 13237~5 illustrated embodiment endless and extends completely around the periphery of outsole 14. Peripheral member has an interior sidewall 24 and an upper surface 26. Member 22 defines a central receptacle 28 that is dimensioned for 5 receiving insert lO.
While in the illustrated embodiment peripheral member 22 is endless, this need not necessarily be the case. Member 22 can, for example, take the form of two longitudinal strips, one for each side of the shoe, or could take the form of several sections spaced around the periphery of the shoe. The form taken by peripheral member 22 should in any event perform its dual function of retaining insert lO and provide stru-.ural support for the peripheral area of the shoe.
Shoe 12 further comprises an upper 30 that can be fashioned of leather, cloth, synthetic materials or a combination of these, and is attached to upper surface 26 of peripheral member 22 by a method later described.
Insert 10 comprises an upper base member 32 and a plurality Gf supporting elements 34 that are preferably formed integrally with base member 32 to depend therefrom.
As shown, elements 34 occupy receptacle 28 when central member or element lO is inserted into shoe 12. Elements 34 are dimensioned such that their depth matches the depth of sidewall 24, and are formed so as to occupy substantially all of receptacle 28 from one sidewall 24 to the other. Base member 32 has an upper surface 36. A
flocking material 38, which is preferably formed of a 9 13237~5 polyester/nylon material but can be formed of any suitable fabric, is joined as by gluing to upper surface 36. As finished out by flocking material 38, insert 10 would not require any insole or liner on top of it to be suitable 5 for wearing.
As shown, base member 32 has a control member 42, and a lip member 40 ~hat extends beyond a central area 42. Cushioning elements 34 depend from central member 42.
Lip member 40 i5 formed to be coextensive with top surface 26 of peripheral member 22. A uniform cushionable upper surface 36 is therefore presented to the wearer's foot throughout the interior of the shoe_.
Referring now to FIGURE ~;- a bottom isometric view of insert 10 is shown. In the illustrated embodiment, insert 10 is integrally formed with an insole portion 44. In the embodiment shown in FIGURE 2, upper surface 36 comprises the upper surface of insole portion 44, and the flocking material 38 (FIGURE 1) is joined to this surface.
In the illustrated embodiment, elements 34 each ta~e the form of a pillar with a rounded free end.
Elements 34 are formed in central area 42 in a closest pac~ing arrangement in Grder to provide cushionable support throughout central area 42. Elements 34 are formed independently of each other, and are only joined to base 32. In this manner, elements 34 provide in effect a multiple-point independent suspension. This is because elements 34 will be compressed and will yield lo 13237~
independently of each other. This is an advantage over midsoles or insoles of solid construction, which have a tendency to yield and compress continuously and uniformly over large areas. The discrete elements 34 on the other hand give an independent, discontinuous support to different portions of the foot that is not obtainable by a midsole or insole of uniform construction.
Elements 34 are graduated in size in order to conform to the depth of sidewall 24 (FIGURE 1). In a front area 46 of area 42, a plurality of relatively small elements 48 and formed. Elements 48 will conform to the relatively thin depth of peripheral member 22 in the front region. In heel region 50, a relatively smaI' number of large heel cushioning elements 52 are formed. The larger size of elements 52 adapts them to the larger depth of peripheral member 22 in heel region 50. Further, since there is a larger cushioning depth of material, the larger size of elements 52 will make sure there is no undue bending or nonradial deformation, as might otherwise occur if a plurality of long, thin elements were used.
Referring now to FIGURE 3, an elevational section taken substantiaily along line 3-3 of FI~URE 1 is shown. FIGURE 3 particularly illustrates the graduated size of elements 34 from front region 46 to rear region 50- Some o the elements 34 are not shown in section because section line 3-3 did not pass throuqh them, or are shown only partially in section because line 3-3 did not pass through them along their major diameter. Insole 11 13237~
portion 44 is shown to have a concave surface 54 in heel region 50 for the support of the heel of the wearer's foot.
Upper 30 has a bottom lip member 56 for mating 5 with upper surace 26 of peripheral member 22. Lip member 56 is attached as by gluing to upper surface 26. Then, an element 58 is placed on top of lip member 56. Element 58 is elongate and extends around the periphery of shoe 12, corresponding to upper surface 26. Element 58 can 10 conveniently be formed of a leatherized paper material or other relatively strong material. Stitching 60 is used to join element 58, lip member 56 and peripheral member 22, y and optionally outsole 14, together.
In operation, shoes 12 and inserts 10 are 15 distributed to retailers as separate items. Each insert 10 has a specific durometer reading that measures its relative yieldability or resiliency. The cushionability of inserts 10 can also be varied by changing the shape and/or spacing of elements 34. A plurality of different 2~ inserts 10 having a range of durometer readings are provided for each shoe size, such that any pair of numerous pairs of inserts 10 can be inserted into a respective pair of shoes 12. A particular pair of inserts 10 are selected for a particular customer according to the 25 customer's weight and cushioning preference. Thus, a lightweight person will in general require an insert 10 that is more cushionable and less resilient than a heavier person. Further, the customer may have a particular 12 13237~5 preference concerning how "soft" or "hard" the shoe feels, and may select a pair of inserts 10 that match his or her preferences in this respect. Finally, there may be medical reasons for selecting a right insert 10 that has a different resiliency and cushionability that a left insert 1n, and the invention will permit this selection.
Referring now to FIGURES 4 and 5, a~ alternate embodiment of a custom insert according to the invention is illustrated. Referring first to FIGURE 4, an alternate insert is indicated generally at 62. Like the other illustrated embodiments, insert 52 has a base member 64 to which a layer 66 of flocking material is attached as by gluing. Insert 62 comprises a central region 68 and a peripheral lip member 70 that is preferably formed lS integrally with region 68. The embodiments shown in FIGURES 4 and 5 differ from the inserts shown in FIGURES
1-3 in that the insole portion 44 formed integrally with the first embodiment has been omitted. In its place, a plurality of convex surface elements 72 has been formed in central region 68. Convex elements 72 are provided to have a massaging effect on the lower surface of the foot of the wearer.
Referring particularly to FIGURE 5, a plurality of cushioning elements 74 depend downwardly from central region 6~. Like the first embodiment, elements 74 are preferably made of large size in the heel region, and are preferably made of smaller size in the toe region in order to conform t~ the lift of peripheral member 2Z. Elements .
;
` 13237~
74 are joined at a middle depth 76 thereof in order to form base member 64. It is preferred that convex surfaces 72 be formed in registry with respective depending elements 74 for convenience in fabrication.
In summary, a novel midsole with a custom insert has been provided in order to vary the resiliency and cushionability of the midsole according to the wearer's needs. Two embodiments of the midsole have been provided, one with an integral insole portion and the other with a plurality of convex elements for a massaging action of the foot. Either embodiment of the midsole has a plurality of depending elements that provide an independent cushioning suspension. _ While preferred embodiments of the invention and their advantages have been described above, the invention is not limited thereto but only by the spirit and scope of the claims which follow.
13237~5 13a SUPPLEMENTARY DISCLOSURE
The present invention preferably has a footbed reinforcing layer joined to the bottom of the receptacle prior to placing the insert therein. The footbed reinforcing layer is preferably much thinner than the depth of the receptacle and provides torsional strength for lateral support of the wearer's foot.
In accordance with one aspect of the invention there is provided a shoe, comprising a durable outsole having an outsole upper surface; a cushionable midsole comprising at least one cushionable peripheral portion and a separate removable insert, a lower surface of said peripheral portion being joined to said outsole upper surface, said at least one peripheral portion forming an orifice for receiving and laterally enclosing said insert; a reinforcing layer joined to said outsole upper surface within said receptacle, said reinforcing layer being substantially thinner than the depth of said receptacle and providing torsional strength; said insert having a lower surface for contacting said reinforcing layer and a preselected cushionability in that it is selected from a plurality of li~e inserts having differing degrees of cushionability and it is selected according to the weight of the wearer; and an upper joined to said peripheral portion.
DESCRIPTION OF D~AWINGS SUPPORTED BY THE SUPPLEMENTARY
DISCLOSURE
FIGURE 6 is an isometric view of a shoe construction according to the invention as fitted with a custom midsole therefor and a reinforcing layer, with parts broken away to show interior structure.
DETAILED DESCRIpTIoN OF THE SUPP~EMENTARY DISCLOSURE
Referring to FIG~RE 6, an isometric view of a preferred embodiment of a shoe construction according to the invention is shown. A custom midsole insert is indicated generally at 10. Insert 10 is shown as fitted into an active wear shoe indicated generally at 12. While the illustrated shoe 12 is one designed for walking, the invention can also be employed in other types of athletic shoes, such as running, aerobic or ; B~
.~
13237~5 court shoes. The invention also has application in any circumstance where varying midsole cushionability is desired.
Shoe 12 is comprised of an outsole 14 that forms the wearing surface of the shoe. Outsole 14 is preferably 5 constructed of a relatively durable, resilient material such as natural rubber. Outsole 14 has an exterior surface that is provided with a suitable tread surface 16. Outsole 14 further has an interior or upper surface 18. Upper surface 18 may be smooth and featureless throughout, or may have a 10 central area 20 that is reticulated or webbed in order to save weight. A peripheral area (not shown) of upper surface 18 represents a smooth surface for gluing or other means of attachment.
A peripheral midsole member 22 is formed to be glued or 15 otherwise attached to the peripheral area of outsole upper surface 18. Peripheral member 22 is more cushionable and yieldable than outsole 14, and can be conveniently molded of polyurethane foam or ethylene vinyl acetate copolymer (EVA).
Peripheral member 22 is as shown in the illustrated 20 embodiment, endless and extends completely around the periphery of outsole 14. Peripheral member 22 has an interior sidewall 24 and an upper surface 26. Member 22 defines a central receptacle 28 that is dimensioned for receiving insert 10.
While in the illustrated embodiment peripheral member 22 is endless, thi~ need not necessarily be the case. Member 22 can, for example, take the form of two longitudinal strips, one for each side of the shoe, or could ta~e the form of several sections spaced around the periphery of the shoe.
30 The form taken by the peripheral member 22 should in any event perform its dual function of retaining insert 10 and providing structural support for the peripheral area of the ; shoe.
A footbed reinforcing layer 31 is affixed as by gluing 35 to outsole upper surface 18 within receptacle 28. Layer 31 is preferably much thinner than the depth of central receptacle 28 so as to allow room for insert 10. Reinforcing A layer 31 is sized to substantially coincide with the bottom area of receptacle 28.
-13b-.
~3~5~
Layer 31 is fabricated of a relatively resilient firmand less flexible material in relation to the EVA forming peripheral member 22. For example, layer 31 can be constructed of a leatherized paper or cardboard. The purpose 5 of layer 31 is to replace torsional strength lost by the creation of receptacle 28 in midsole member 22. Thus, a midsole/outsole configuration having satisfactory torsional strength is formed for proper lateral support of the wearer's foot while at the same time providing for a central insert 10 10 having selectable cushionability.
Shoe 12 further comprises an upper 30 that can be fashioned of leather, cloth, synthetic materials or a combination of these, and is attached to upper surface 26 of peripheral member 22.
Insert 10 comprises an upper base member 32 and a plurality of supporting elements 34 that are preferably formed integrally with base member 32 to depend therefrom.
As shown, elements 34 occupy receptacle 28 when central member or element 10 is inserted into shoe 12. Elements 34 20 are dimensioned such that their depth matches the depth of sidewall 24 minus the thickness of layer 31, and are formed so as to occupy substantially all of receptacle 28 from one sidewall 24 to the other. Peripheral member 22 and removable insert 10 are apportioned such that most of the weight of the 25 wearer will be borne by insert 10.
Base member 32 has an upper surface 36. A flocking material 38, which is preferably formed of a polyester/nylon material but can be formed of any suitable fabric, is joined as by gluing to upper surface 36. As finished out by 30 flocking material 38, insert 10 would not require any insole or liner on top of it to be suitable for wearing.
As shown, base member 32 has a central member 42, and a lip 40 that extends beyond central area 42. Cushioning elements 34 depend from central member 42. Lip member 40 is 35 formed to be coextensive with top surface 26 of peripheral member 22. A uniform cushionable upper surface 36 is therefore presented to the wearer's foot throughout the interior of the shoe.
-13c-
13~3755 CUSTOM MIDSOLE
TECHNICAL FIELD OF THE INVENTION
This invention relates in general to athletic or other activewear shoes, and more particularly relates to shoes having custom midsoles.
BACKGROUND OF THE INVENTION
Athletic or other activewear shoes of a conventional construction generally have three or four separate parts. First, such shoes are provided with an outsole that is made of a durable material and that extends across the lower surface of the shoe. A midsole is joined to the outsole to provide a cushioning layer to the wearer's foot. Usually, an upper formed of leather, synthetics or other materials is joined to the midsole.
In many conventional structures, an insole is further provided for disposal between the midsole and the wearer's foot for additional cushioning.
The midsoles of these conventional constructions have two undesirable characteristics. First, they have the property of deforming over a large area of surface when a downward force is impressed on them. Second, the midsoles are affixed to the shoes and therefore customers can make no choice in the midsole's cushionability without selecting another shoe. Thus, conventional midsoles do not offer anything in the way of independent suspension or deformation of various areas thereof, and further are suited to only a particular weiqht class or cushionability preference of wearers.
Thus, a need exists in the industry for a midsole that has a plurality of cushioning elements, each demonstratin~ an individual suspension and deforming independently from the remaininq elements. Further, a need exists in the industry for midsoles that can be ~3237~
selected according to the weight or cushionability preference of the wearer.
4 13237~5 SUMMARY OF THE INVENTION
In accordance with one aspect of the invention there is provided a shoe, comprising: a durable outsole having an outsole upper surface; a cushionable midsole. comprising at least one cushionable peripheral portion and a separate removable insert, a lower surface of said peripheral portion being joined to said outsole upper surface, said at least one peripheral portion forming an orifice for receiving and laterally enclosing said insert; said insert having a preselected cushionability in that it is selected from a plurality of like inserts having differing degrees of cushionability and it is selected according to the weight of the wearer; and an upper joined to said peripheral portion.
In accordance with another aspect of the invention there is provided a midsole for disposal on an upper surface of an outsole, comprising: a removable insert of said midsole, and a peripheral member of said midsole disposed laterally outwardly of said removable insert; said peripheral member forming an orifice, said removable insert insertable through said orifice to be substantially adjacent to said upper surface of said outsole, said peripheral member permanently affixed to said upper surface of said outsole; said removable insert having a lower surface for disposal substantially adjacent to said upper surface of said ou~sole, a plurality of cushioning elements formed to fill at least a major portion of said lower surface, said elements each operable to cushionably deform and flatten responsive to a force having a component perpendicular to said lower sllrface at said element, each element operable to deform independently of the remaining elements.
In accordance with yet another aspect of the invention there is provided a sole construction for a shoe, comprising:
an outsole having an upper surface; a cushionable midsole comprising at least one cushionable peripheral portion and a separate removable insert, a lower surface of said peripheral portion being joined to said outsole upper surface, said at least one peripheral portion forming an orifice for receiving and laterally enclosing said insert; said insert having a `:
.~
5 13237~
preselected cushionability and being selected according to the weight or cushionability preference of the wearer from among a plurality of like inserts having differing degrees of cushionability.
In accordance with yet another aspect of the invention there is provided a method for fabricating a shoe, comprising:
joining an outsole to a cushionable peripheral member of a midsole to form an orifice for receiving and peripherally enclosing a removable insert of the midsole; joining an upper to the peripheral portion; selecting the insert from a plurality of like inserts having different cushionabilities, the selection being made according to the weight or cushionability preference of the wearer; and inserting the selected insert into the orifice.
6 13237~
BXIEF DESCRIPTION OF THE DRAWINGS
Various aspects of the invention and their advantages will be more completely understood by reference to the following Detailed Description in conjunction with the appended drawings in which:
EIGURE 1 is an isometric view of a shoe construction according to the invention as fitted with a custom midsole therefor, with parts broken away to show interior structure;
FIGURE 2 is a bottom isometric view of a preferred embodiment of a custom midsole insert of the invention;
FIGURE 3 i8 a longitudinal section taken substantially along line 3-3 of EIGURE l;
FIGURE 4 is a top isometric view of an alternate embodiment of a custom midsole insert according to the invention; and FIGURE 5 is a longitudinal section taken substantially along line 5-5 of FIGURE 4.
7 1323~55 DETAILED DESC~IPTION
Referring first to FIGURE 1, an isometric view of a preferred embodiment of a shoe construction according to the invention is shown. A custom midsole insert is indicated generally at lO. Insert lO is shown as fitted into an active wear shoe indicated generally at 12. While the illustrated shoe 12 is one designed for walking, the invention can also be employed in other types of athletic shoes, such as running, aerobics, or court shoes. The invention also has application in any circumstance where varying midsole cushionability is desired.
Shoe 12 is comprised of an outsole 14 that forms the wearing surface of the shoe. Outsole 14 is preferably constructed of a relatively durable, resilient material such as natural rubber. Outsole 14 has an exterior surface that is provid0d with a suitable tread surface 16.
Outsole 14 further has an interior or upper surface 18.
Upper surface 18 may be smooth and featureless throughout, or may have a central area 20 that is reticulated or webbed in order to save weight. A peripheral area (not shown) of upper surface 18 presents a smooth surface or gluing or other means of attachment.
A peripheral midsole member 22 is formed to be glued or otherwise attached to the peripheral area of outsole upper surface 18. Peripheral member 22 is more cushionable and yieldable than outsole 14, and can be conveniently molded of polyurethane foam or ethylene vinyl acet~ee copolymer (EVA). Per~pheral member ~ ls in the 8 13237~5 illustrated embodiment endless and extends completely around the periphery of outsole 14. Peripheral member has an interior sidewall 24 and an upper surface 26. Member 22 defines a central receptacle 28 that is dimensioned for 5 receiving insert lO.
While in the illustrated embodiment peripheral member 22 is endless, this need not necessarily be the case. Member 22 can, for example, take the form of two longitudinal strips, one for each side of the shoe, or could take the form of several sections spaced around the periphery of the shoe. The form taken by peripheral member 22 should in any event perform its dual function of retaining insert lO and provide stru-.ural support for the peripheral area of the shoe.
Shoe 12 further comprises an upper 30 that can be fashioned of leather, cloth, synthetic materials or a combination of these, and is attached to upper surface 26 of peripheral member 22 by a method later described.
Insert 10 comprises an upper base member 32 and a plurality Gf supporting elements 34 that are preferably formed integrally with base member 32 to depend therefrom.
As shown, elements 34 occupy receptacle 28 when central member or element lO is inserted into shoe 12. Elements 34 are dimensioned such that their depth matches the depth of sidewall 24, and are formed so as to occupy substantially all of receptacle 28 from one sidewall 24 to the other. Base member 32 has an upper surface 36. A
flocking material 38, which is preferably formed of a 9 13237~5 polyester/nylon material but can be formed of any suitable fabric, is joined as by gluing to upper surface 36. As finished out by flocking material 38, insert 10 would not require any insole or liner on top of it to be suitable 5 for wearing.
As shown, base member 32 has a control member 42, and a lip member 40 ~hat extends beyond a central area 42. Cushioning elements 34 depend from central member 42.
Lip member 40 i5 formed to be coextensive with top surface 26 of peripheral member 22. A uniform cushionable upper surface 36 is therefore presented to the wearer's foot throughout the interior of the shoe_.
Referring now to FIGURE ~;- a bottom isometric view of insert 10 is shown. In the illustrated embodiment, insert 10 is integrally formed with an insole portion 44. In the embodiment shown in FIGURE 2, upper surface 36 comprises the upper surface of insole portion 44, and the flocking material 38 (FIGURE 1) is joined to this surface.
In the illustrated embodiment, elements 34 each ta~e the form of a pillar with a rounded free end.
Elements 34 are formed in central area 42 in a closest pac~ing arrangement in Grder to provide cushionable support throughout central area 42. Elements 34 are formed independently of each other, and are only joined to base 32. In this manner, elements 34 provide in effect a multiple-point independent suspension. This is because elements 34 will be compressed and will yield lo 13237~
independently of each other. This is an advantage over midsoles or insoles of solid construction, which have a tendency to yield and compress continuously and uniformly over large areas. The discrete elements 34 on the other hand give an independent, discontinuous support to different portions of the foot that is not obtainable by a midsole or insole of uniform construction.
Elements 34 are graduated in size in order to conform to the depth of sidewall 24 (FIGURE 1). In a front area 46 of area 42, a plurality of relatively small elements 48 and formed. Elements 48 will conform to the relatively thin depth of peripheral member 22 in the front region. In heel region 50, a relatively smaI' number of large heel cushioning elements 52 are formed. The larger size of elements 52 adapts them to the larger depth of peripheral member 22 in heel region 50. Further, since there is a larger cushioning depth of material, the larger size of elements 52 will make sure there is no undue bending or nonradial deformation, as might otherwise occur if a plurality of long, thin elements were used.
Referring now to FIGURE 3, an elevational section taken substantiaily along line 3-3 of FI~URE 1 is shown. FIGURE 3 particularly illustrates the graduated size of elements 34 from front region 46 to rear region 50- Some o the elements 34 are not shown in section because section line 3-3 did not pass throuqh them, or are shown only partially in section because line 3-3 did not pass through them along their major diameter. Insole 11 13237~
portion 44 is shown to have a concave surface 54 in heel region 50 for the support of the heel of the wearer's foot.
Upper 30 has a bottom lip member 56 for mating 5 with upper surace 26 of peripheral member 22. Lip member 56 is attached as by gluing to upper surface 26. Then, an element 58 is placed on top of lip member 56. Element 58 is elongate and extends around the periphery of shoe 12, corresponding to upper surface 26. Element 58 can 10 conveniently be formed of a leatherized paper material or other relatively strong material. Stitching 60 is used to join element 58, lip member 56 and peripheral member 22, y and optionally outsole 14, together.
In operation, shoes 12 and inserts 10 are 15 distributed to retailers as separate items. Each insert 10 has a specific durometer reading that measures its relative yieldability or resiliency. The cushionability of inserts 10 can also be varied by changing the shape and/or spacing of elements 34. A plurality of different 2~ inserts 10 having a range of durometer readings are provided for each shoe size, such that any pair of numerous pairs of inserts 10 can be inserted into a respective pair of shoes 12. A particular pair of inserts 10 are selected for a particular customer according to the 25 customer's weight and cushioning preference. Thus, a lightweight person will in general require an insert 10 that is more cushionable and less resilient than a heavier person. Further, the customer may have a particular 12 13237~5 preference concerning how "soft" or "hard" the shoe feels, and may select a pair of inserts 10 that match his or her preferences in this respect. Finally, there may be medical reasons for selecting a right insert 10 that has a different resiliency and cushionability that a left insert 1n, and the invention will permit this selection.
Referring now to FIGURES 4 and 5, a~ alternate embodiment of a custom insert according to the invention is illustrated. Referring first to FIGURE 4, an alternate insert is indicated generally at 62. Like the other illustrated embodiments, insert 52 has a base member 64 to which a layer 66 of flocking material is attached as by gluing. Insert 62 comprises a central region 68 and a peripheral lip member 70 that is preferably formed lS integrally with region 68. The embodiments shown in FIGURES 4 and 5 differ from the inserts shown in FIGURES
1-3 in that the insole portion 44 formed integrally with the first embodiment has been omitted. In its place, a plurality of convex surface elements 72 has been formed in central region 68. Convex elements 72 are provided to have a massaging effect on the lower surface of the foot of the wearer.
Referring particularly to FIGURE 5, a plurality of cushioning elements 74 depend downwardly from central region 6~. Like the first embodiment, elements 74 are preferably made of large size in the heel region, and are preferably made of smaller size in the toe region in order to conform t~ the lift of peripheral member 2Z. Elements .
;
` 13237~
74 are joined at a middle depth 76 thereof in order to form base member 64. It is preferred that convex surfaces 72 be formed in registry with respective depending elements 74 for convenience in fabrication.
In summary, a novel midsole with a custom insert has been provided in order to vary the resiliency and cushionability of the midsole according to the wearer's needs. Two embodiments of the midsole have been provided, one with an integral insole portion and the other with a plurality of convex elements for a massaging action of the foot. Either embodiment of the midsole has a plurality of depending elements that provide an independent cushioning suspension. _ While preferred embodiments of the invention and their advantages have been described above, the invention is not limited thereto but only by the spirit and scope of the claims which follow.
13237~5 13a SUPPLEMENTARY DISCLOSURE
The present invention preferably has a footbed reinforcing layer joined to the bottom of the receptacle prior to placing the insert therein. The footbed reinforcing layer is preferably much thinner than the depth of the receptacle and provides torsional strength for lateral support of the wearer's foot.
In accordance with one aspect of the invention there is provided a shoe, comprising a durable outsole having an outsole upper surface; a cushionable midsole comprising at least one cushionable peripheral portion and a separate removable insert, a lower surface of said peripheral portion being joined to said outsole upper surface, said at least one peripheral portion forming an orifice for receiving and laterally enclosing said insert; a reinforcing layer joined to said outsole upper surface within said receptacle, said reinforcing layer being substantially thinner than the depth of said receptacle and providing torsional strength; said insert having a lower surface for contacting said reinforcing layer and a preselected cushionability in that it is selected from a plurality of li~e inserts having differing degrees of cushionability and it is selected according to the weight of the wearer; and an upper joined to said peripheral portion.
DESCRIPTION OF D~AWINGS SUPPORTED BY THE SUPPLEMENTARY
DISCLOSURE
FIGURE 6 is an isometric view of a shoe construction according to the invention as fitted with a custom midsole therefor and a reinforcing layer, with parts broken away to show interior structure.
DETAILED DESCRIpTIoN OF THE SUPP~EMENTARY DISCLOSURE
Referring to FIG~RE 6, an isometric view of a preferred embodiment of a shoe construction according to the invention is shown. A custom midsole insert is indicated generally at 10. Insert 10 is shown as fitted into an active wear shoe indicated generally at 12. While the illustrated shoe 12 is one designed for walking, the invention can also be employed in other types of athletic shoes, such as running, aerobic or ; B~
.~
13237~5 court shoes. The invention also has application in any circumstance where varying midsole cushionability is desired.
Shoe 12 is comprised of an outsole 14 that forms the wearing surface of the shoe. Outsole 14 is preferably 5 constructed of a relatively durable, resilient material such as natural rubber. Outsole 14 has an exterior surface that is provided with a suitable tread surface 16. Outsole 14 further has an interior or upper surface 18. Upper surface 18 may be smooth and featureless throughout, or may have a 10 central area 20 that is reticulated or webbed in order to save weight. A peripheral area (not shown) of upper surface 18 represents a smooth surface for gluing or other means of attachment.
A peripheral midsole member 22 is formed to be glued or 15 otherwise attached to the peripheral area of outsole upper surface 18. Peripheral member 22 is more cushionable and yieldable than outsole 14, and can be conveniently molded of polyurethane foam or ethylene vinyl acetate copolymer (EVA).
Peripheral member 22 is as shown in the illustrated 20 embodiment, endless and extends completely around the periphery of outsole 14. Peripheral member 22 has an interior sidewall 24 and an upper surface 26. Member 22 defines a central receptacle 28 that is dimensioned for receiving insert 10.
While in the illustrated embodiment peripheral member 22 is endless, thi~ need not necessarily be the case. Member 22 can, for example, take the form of two longitudinal strips, one for each side of the shoe, or could ta~e the form of several sections spaced around the periphery of the shoe.
30 The form taken by the peripheral member 22 should in any event perform its dual function of retaining insert 10 and providing structural support for the peripheral area of the ; shoe.
A footbed reinforcing layer 31 is affixed as by gluing 35 to outsole upper surface 18 within receptacle 28. Layer 31 is preferably much thinner than the depth of central receptacle 28 so as to allow room for insert 10. Reinforcing A layer 31 is sized to substantially coincide with the bottom area of receptacle 28.
-13b-.
~3~5~
Layer 31 is fabricated of a relatively resilient firmand less flexible material in relation to the EVA forming peripheral member 22. For example, layer 31 can be constructed of a leatherized paper or cardboard. The purpose 5 of layer 31 is to replace torsional strength lost by the creation of receptacle 28 in midsole member 22. Thus, a midsole/outsole configuration having satisfactory torsional strength is formed for proper lateral support of the wearer's foot while at the same time providing for a central insert 10 10 having selectable cushionability.
Shoe 12 further comprises an upper 30 that can be fashioned of leather, cloth, synthetic materials or a combination of these, and is attached to upper surface 26 of peripheral member 22.
Insert 10 comprises an upper base member 32 and a plurality of supporting elements 34 that are preferably formed integrally with base member 32 to depend therefrom.
As shown, elements 34 occupy receptacle 28 when central member or element 10 is inserted into shoe 12. Elements 34 20 are dimensioned such that their depth matches the depth of sidewall 24 minus the thickness of layer 31, and are formed so as to occupy substantially all of receptacle 28 from one sidewall 24 to the other. Peripheral member 22 and removable insert 10 are apportioned such that most of the weight of the 25 wearer will be borne by insert 10.
Base member 32 has an upper surface 36. A flocking material 38, which is preferably formed of a polyester/nylon material but can be formed of any suitable fabric, is joined as by gluing to upper surface 36. As finished out by 30 flocking material 38, insert 10 would not require any insole or liner on top of it to be suitable for wearing.
As shown, base member 32 has a central member 42, and a lip 40 that extends beyond central area 42. Cushioning elements 34 depend from central member 42. Lip member 40 is 35 formed to be coextensive with top surface 26 of peripheral member 22. A uniform cushionable upper surface 36 is therefore presented to the wearer's foot throughout the interior of the shoe.
-13c-
Claims (33)
1. A shoe, comprising:
a durable outsole having an outsole upper surface;
a cushionable midsole comprising at least one cushionable peripheral portion and a separate removable insert, a lower surface of said peripheral portion being joined to said outsole upper surface, said at least one peripheral portion forming an orifice for receiving and laterally enclosing said insert;
said insert having a preselected cushionability in that it is selected from a plurality of like inserts having differing degrees of cushionability and it is selected according to the weight of the wearer; and an upper joined to said peripheral portion.
a durable outsole having an outsole upper surface;
a cushionable midsole comprising at least one cushionable peripheral portion and a separate removable insert, a lower surface of said peripheral portion being joined to said outsole upper surface, said at least one peripheral portion forming an orifice for receiving and laterally enclosing said insert;
said insert having a preselected cushionability in that it is selected from a plurality of like inserts having differing degrees of cushionability and it is selected according to the weight of the wearer; and an upper joined to said peripheral portion.
2. A shoe according to claim 1, wherein said insert received in said peripheral portion is dimensioned to receive most of the weight transmitted to said midsole by the wearer.
3. A shoe according to claim 1, wherein said peripheral portion is elongate and endless.
4. A shoe according to claim 3, wherein said peripheral portion has an upper surface, a lower lip member of said upper joined to said upper surface of said peripheral portion.
5. A shoe according to claim 4, and further comprising:
an elongate endless peripheral liner joined to said lip member of said upper, said lip member being disposed between said upper surface of said peripheral portion and said liner.
an elongate endless peripheral liner joined to said lip member of said upper, said lip member being disposed between said upper surface of said peripheral portion and said liner.
6. A shoe according to claim 1, wherein said peripheral portion comprises a toe portion and a heel portion integrally formed with said toe portion, the thickness of said peripheral portion decreasing from said heel portion to said toe portion, said insert having a front end and a rear end, the thickness of said insert decreasing from said rear end to said front end in manner similar to that of said peripheral portion.
7. A shoe according to claim 1, wherein said insert is formed of polyurethane foam.
8. A shoe according to claim 1, and further comprising an insole integrally formed with said insert, said insole extending substantially over said peripheral portion.
9. A shoe according to claim 1, wherein said peripheral portion and said insert each have respective upper surfaces, the shoe further including a fabric joined to said insert upper surface and extending laterally outwardly to form a fabric lip member that substantially covers the upper surface of said peripheral portion.
10. A shoe according to claim 9, wherein said fabric comprises a flocking material polyester and nylon.
11. A midsole for disposal on an upper surface of an outsole, comprising: a removable insert of said midsole, and a peripheral member of said midsole disposed laterally outwardly of said removable insert; said peripheral member forming an orifice, said removable insert insertable through said orifice to be substantially adjacent to said upper surface of said outsole, said peripheral member permanently affixed to said upper surface of said outsole; said removable insert having a lower surface for disposal substantially adjacent to said upper surface of said outsole, a plurality of cushioning elements formed to fill at least a major portion of said lower surface, said elements each operable to cushionably deform and flatten responsive to a force having a component perpendicular to said lower surface at said element, each element operable to deform independently of the remaining elements.
12. The midsole of claim 11, wherein said cushioning elements are radially symmetrical.
13. The midsole of claim 12, wherein said cushioning elements are approximately hemispherical in shape.
14. The midsole of claim 12, wherein said cushioning elements take the form of pillars with rounded free ends.
15. The midsole of claim 11, wherein said elements are each laterally adjacent a plurality of other elements in a closest-packing arrangement.
16. The midsole of claim 11, wherein said elements are arranged in transverse rows.
17. The midsole of claim 11, wherein said peripheral member comprises a heel portion, a toe portion of said peripheral member integrally formed with said heel portion, the thickness of said peripheral member decreasing from said heel portion to said toe portion;
said insert having a rear end, and front end of said insert integrally formed with said rear end, the thickness of said removable insert decreasing from said rear end to said front end in correspondence with the decreasing thickness of said heel portion to said toe portion.
said insert having a rear end, and front end of said insert integrally formed with said rear end, the thickness of said removable insert decreasing from said rear end to said front end in correspondence with the decreasing thickness of said heel portion to said toe portion.
18. The midsole of claim 17, wherein said elements are radially symmetrical and are each laterally adjacent a plurality of like elements in a closest-packing arrangement, each element having a radial size, the radial size of said elements decreasing from said rear end to said front end on order to effect a decrease in the thickness of said removable insert from said rear end to said front end.
19. The midsole of claim 11, and further comprising an upper surface of said removable insert, a fabric layer lined to said removable insert upper surface, said fabric layer laterally extending beyond the periphery of said removable insert to cover an upper surface of said peripheral member.
20. The midsole of claim 19, wherein said fabric layer comprises a flocking material comprised of nylon and polyester.
21. The midsole of claim 11, wherein said removable insert has an upper surface, a plurality of convex elements formed in said upper surface.
22. The midsole of claim 21, wherein said upper surface convex elements each correspond to a respective lower surface convex element.
23. The midsole of claim 11, wherein said removable insert is integrally formed with an insole member, said insole member formed above said removable insert and extending laterally to cover an upper surface of said peripheral member.
24. The midsole of claim 23, and further comprising:
a fabric layer joined to an upper surface of said insole member.
a fabric layer joined to an upper surface of said insole member.
25. The midsole of claim 11, wherein said removable insert is comprised of a cushionable synthetic material, said removable insert selectable from among a plurality of like inserts having different cushionabilities.
26. A sole construction for a shoe, comprising:
an outsole having an upper surface;
a cushionable midsole comprising at least one cushionable peripheral portion and a separate removable insert, a lower surface of said peripheral portion being joined to said outsole upper surface, said at least one peripheral portion forming an orifice for receiving and laterally enclosing said insert; said insert having a preselected cushionability and being selected according to the weight or cushionability preference of the wearer from among a plurality of like inserts having differing degrees of cushionability.
an outsole having an upper surface;
a cushionable midsole comprising at least one cushionable peripheral portion and a separate removable insert, a lower surface of said peripheral portion being joined to said outsole upper surface, said at least one peripheral portion forming an orifice for receiving and laterally enclosing said insert; said insert having a preselected cushionability and being selected according to the weight or cushionability preference of the wearer from among a plurality of like inserts having differing degrees of cushionability.
27. A method for fabricating a shoe, comprising:
joining an outsole to a cushionable peripheral member of a midsole to form an orifice for receiving and peripherally enclosing a removable insert of the midsole;
joining an upper to the peripheral portion;
selecting the insert from a plurality of like inserts having different cushionabilities, the selection being made according to the weight or cushionability preference of the wearer; and inserting the selected insert into the orifice.
Claims supported by the Supplementary Disclosure
joining an outsole to a cushionable peripheral member of a midsole to form an orifice for receiving and peripherally enclosing a removable insert of the midsole;
joining an upper to the peripheral portion;
selecting the insert from a plurality of like inserts having different cushionabilities, the selection being made according to the weight or cushionability preference of the wearer; and inserting the selected insert into the orifice.
Claims supported by the Supplementary Disclosure
28. The shoe according to claim 1, wherein a reinforcing layer is joined to said outsole upper surface within said receptacle, said reinforcing layer being substantially thinner than the depth of said receptacle and providing torsional strength, said insert having a lower surface for contacting the reinforcing layer.
29. The shoe according to claim 28, wherein said reinforcing layer is substantially less flexible and more resilient than said peripheral portion.
30. The shoe according to claim 29, wherein said reinforcing layer comprises leatherized paper or cardboard.
31. The midsole according to Claim 11, wherein said midsole has an upper surface and wherein a reinforcing layer is joined to said upper surface of said midsole within said peripheral member and has a thickness substantially less than said peripheral member.
32. The sole according to claim 26, wherein a reinforcing layer substantially less thick than said peripheral portion is joined to said outsole upper surface within said receptacle.
33. The method of Claim 27, wherein the outsole has an upper surface and wherein the method further comprises the step of;
joining a reinforcing layer having a thickness substantially less than said peripheral member to an upper surface of said outsole within the receptacle.
joining a reinforcing layer having a thickness substantially less than said peripheral member to an upper surface of said outsole within the receptacle.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW75111333 | 1986-11-28 | ||
| KR1987-1446 | 1987-02-20 | ||
| KR1019870001446A KR900005672B1 (en) | 1987-02-20 | 1987-02-20 | Insole of shoes |
| US07/025,010 US4733483A (en) | 1987-02-20 | 1987-03-12 | Custom midsole |
| US07/153,222 US4905382A (en) | 1987-02-20 | 1988-02-08 | Custom midsole |
| US153,222 | 1988-02-08 | ||
| US025,010 | 1993-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1323755C true CA1323755C (en) | 1993-11-02 |
Family
ID=27482851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000549627A Expired - Fee Related CA1323755C (en) | 1986-11-28 | 1987-10-19 | Custom midsole |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1323755C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5799417A (en) * | 1997-01-13 | 1998-09-01 | Bata Limited | Shoe sole with removal insert |
-
1987
- 1987-10-19 CA CA000549627A patent/CA1323755C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5799417A (en) * | 1997-01-13 | 1998-09-01 | Bata Limited | Shoe sole with removal insert |
| US6023859A (en) * | 1997-01-13 | 2000-02-15 | Bata Limited | Shoe sole with removal insert |
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