US20020050077A1 - Footwear with visible, replaceable cushioning cassette - Google Patents
Footwear with visible, replaceable cushioning cassette Download PDFInfo
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- US20020050077A1 US20020050077A1 US09/336,361 US33636199A US2002050077A1 US 20020050077 A1 US20020050077 A1 US 20020050077A1 US 33636199 A US33636199 A US 33636199A US 2002050077 A1 US2002050077 A1 US 2002050077A1
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- cassette
- footwear
- cavity
- midsole
- midsole section
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B7/00—Footwear with health or hygienic arrangements
- A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
- A43B7/1405—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form
- A43B7/1415—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form characterised by the location under the foot
- A43B7/144—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form characterised by the location under the foot situated under the heel, i.e. the calcaneus bone
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B1/00—Footwear characterised by the material
- A43B1/0072—Footwear characterised by the material made at least partially of transparent or translucent materials
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- 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
- A43B13/20—Pneumatic soles filled with a compressible fluid, e.g. air, gas
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/28—Soles; Sole-and-heel integral units characterised by their attachment, also attachment of combined soles and heels
- A43B13/36—Easily-exchangeable soles
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B21/00—Heels; Top-pieces or top-lifts
- A43B21/24—Heels; Top-pieces or top-lifts characterised by the constructive form
- A43B21/32—Resilient supports for the heel of the foot
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B21/00—Heels; Top-pieces or top-lifts
- A43B21/36—Heels; Top-pieces or top-lifts characterised by their attachment; Securing devices for the attaching means
- A43B21/42—Heels with replaceable or adjustable parts, e.g. top lift
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B5/00—Footwear for sporting purposes
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B5/00—Footwear for sporting purposes
- A43B5/06—Running shoes; Track shoes
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B7/00—Footwear with health or hygienic arrangements
- A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
- A43B7/1405—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form
- A43B7/1415—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form characterised by the location under the foot
- A43B7/1445—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form characterised by the location under the foot situated under the midfoot, i.e. the second, third or fourth metatarsal
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B7/00—Footwear with health or hygienic arrangements
- A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
- A43B7/1405—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form
- A43B7/1455—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form with special properties
- A43B7/1463—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form with special properties with removable pads to allow custom fit
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B7/00—Footwear with health or hygienic arrangements
- A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
- A43B7/1405—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form
- A43B7/1455—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form with special properties
- A43B7/1464—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form with special properties with adjustable pads to allow custom fit
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B7/00—Footwear with health or hygienic arrangements
- A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
- A43B7/1405—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form
- A43B7/1475—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form characterised by the type of support
- A43B7/148—Recesses or holes filled with supports or pads
Abstract
Footwear, particularly an athletic or sport shoe, having a sole with a visible, replaceable cushioning cassette, and method for modifying impact response capacity or color pattern by removing and replacing the cushioning cassette. The invention also provides footwear, comprising a sole; and an upper connected to the sole, the sole comprising an outsole; and a midsole, the midsole comprising a midsole section wherein walls of a periphery of cells form in the midsole section at least one cavity for receiving a cushioning cassette, which, when within the cavity, is visible through clear material of the sole when viewed from outside of the footwear.
Description
- The present invention relates to footwear. More particularly, the present invention relates to an athletic or sport shoe having a sole with a visible, replaceable cushioning cassette.
- The visual appeal of shoe components, particularly the appeal of color in visible shoe components, is an important aesthetic consideration in shoe design. Visible shoe components—including laces, tongues, vamp sections, and other components of uppers—form a color pattern that often is integral, for example, to an overall color pattern of a schema for uniform dress of a team, a band, or a cheerleading squad.
- While color characteristics of uppers are of primary importance for a shoe's visual appeal, color characteristics of soles and sole components may also be of importance for a shoe's visual appeal. However, soles, including those of athletic or sport shoes, are designed primarily to mediate impacts between the feet of a wearer and a surface on which the wearer treads.
- The impact response capacity of a shoe is critical for a shoe's practical utility. Significant force is often placed on the front and heel regions of a shoe sole when a wearer walks, runs, or jumps. Such force may be particularly strong and recurrent when a wearer walks, runs, or jumps during the fray of athletic competition or other sporting activity.
- The impact response capacity of a shoe is tied closely to the cushioning capacity of the shoe's sole. Cushioning capacity of a sole, i.e., its capacity to mediate impacts between a wearer's foot and a surface, has two component capacities: (1) shock absorption capacity, and (2) resilience capacity. Achieving a balance in shock absorption and resilience capacities is advantageous for optimizing the impact response capacity of a shoe.
- While soles of some shoes may be unitary, and others may comprise two layers (e.g., outsole and midsole), soles of athletic or sport shoes typically comprise three layers: outsole, midsole, and insole. Furthermore, while each of these layers typically has a role in mediating a shoe's impact response capacity, the role of the midsole is usually primary, in either a shoe having a sole comprising two layers or a shoe having a sole comprising three layers. Consistent with this primary role of the midsole, some shoe designs provide midsole elements that may be interchanged in order to facilitate modifying a shoe's impact response capacity.
- Certain air-bladder inserts for midsoles, which are cemented in a sole, have been developed to facilitate production of shoes with varying impact response capacities. Since these air-bladder inserts are cemented in a sole, their visibility is restricted, even though, in some shoe designs, transparent areas in a shoe's heel region may allow air-bladder inserts to be viewed from below the sole. In addition, since these air-bladder inserts are cemented into place during shoe manufacture, they do not permit either a shoe's impact response capacity or a shoe's color pattern to be readily modified.
- Accordingly, the present invention provides footwear having a sole with a visible cushioning cassette which may be conveniently removed and replaced in order to allow either impact response capacity or color pattern of an individual piece of footwear to be readily modified. In order to modify impact response capacity, replacement is accomplished with a visible cushioning cassette having a different cushioning capacity, while in order to modify color pattern, replacement is accomplished with a visible cushioning cassette of a different color.
- In particular, the present invention provides footwear, particularly an athletic or sport shoe, comprising a sole and an upper connected to the sole, the sole having at least one cavity therein for receiving a cushioning cassette, the cavity being accessible to permit removal and replacement of the cassette, which, when within the cavity, is visible through clear (such as transparent or translucent) material of the sole when viewed from outside of the footwear. In preferred embodiments, the invention provides footwear, particularly an athletic or sport shoe, comprising a sole and an upper connected to the sole, the sole comprising an outsole; and a midsole, the midsole comprising a midsole section having at least one cavity therein for receiving a cushioning cassette, the cavity being accessible to permit removal and replacement of the cassette, which, when within the cavity, is visible through clear (such as transparent or translucent) material of the sole when viewed from outside of the footwear. In other related preferred embodiments, the present invention provides such footwear, wherein the midsole section is made largely of clear material.
- Embodiments of footwear as provided by the present invention include those having soles with other structures that address practical needs for lightness, durability, and structural integrity in the soles. Use of sole structures composed of cells arranged in reticulated or honeycomb-like patterns (i.e., use of reticulated wall structures) lessens sole mass, in comparison with soles that lack such cells. Furthermore, use of such reticulated wall structures in sole layers may provide strength and stabilize soles against lateral collapse. Consequently, the use of such reticulated wall structures in soles is particularly suitable for athletic or sport shoes, since both low sole mass and high sole strength are generally desired in athletic or sport shoes.
- Accordingly, the present invention also provides other preferred embodiments of such previously noted footwear wherein a cavity for a cushioning cassette is formed by walls of cells in a midsole section, wherein walls of these cells also form a reticulated wall structure in the midsole section. The present invention also provides other preferred embodiments of such footwear wherein the midsole section is largely made of clear material. The present invention also provides other preferred embodiments of such footwear (wherein the midsole section is, or is not, largely made of clear material, but wherein a cavity for a cushioning cassette is formed by walls of cells, and wherein walls of these cells also form a reticulated wall structure in the midsole section) wherein a bottom of the cavity for the cushioning cassette also comprises a reticulated wall structure.
- In other preferred embodiments, the invention provides all such previously noted footwear having a sole comprising an outsole and a midsole, but wherein the sole additionally comprises an insole, so that the sole comprises an outsole; a midsole, the midsole comprising a midsole section having at least one cavity therein for receiving a cushioning cassette, the cavity being accessible to permit removal and replacement of the cassette, which, when within the cavity, is visible through clear material of the sole when viewed from outside of the footwear; and an insole. In various embodiments of such footwear, the midsole section is (or is not) largely made of clear material, and a cavity for a cushioning cassette is (or is not) formed by walls of cells in the midsole section, wherein walls of the cells also form a reticulated wall structure in the midsole section.
- The present invention also provides method for modifying color pattern (or impact response capacity) of footwear having a sole with a visible, replaceable cushioning cassette, the method comprising removing the cassette from the sole, and replacing the cassette with another of a different color (or different cushioning capacity). In embodiments where a cushioning cassette in a cavity of a midsole section is accessible without removing an area of the insole, the present invention also provides method for modifying color pattern (or impact response capacity) of footwear, the method comprising removing the visible cushioning cassette, and replacing the visible cushioning cassette with another of a different color (or different cushioning capacity). In embodiments where a cushioning cassette in a cavity of a midsole section is accessible through an insole, the present invention also provides method for modifying color pattern (or impact response capacity) of footwear, the method comprising lifting an insole area above the cavity, removing the visible cushioning cassette, and replacing the visible cushioning cassette with another of a different color (or different cushioning capacity).
- The present invention may also be embodied in articles of manufacture other than footwear. In particular, the visible, replaceable cushioning cassette, as provided by the present invention, may be utilized, without limitation, in grips and gripping elements of all kinds (including, for example, handles for suitcases or levers for furniture and appliances), pads or padding elements of all kinds (including, for example, bottom units for feet of chairs, stools, or stands; or seat units for furniture, buses, or airplanes), cushioning components of all kinds (including, for example, packaging pads and automotive or aerospace cushioning devices), and the like.
- Other features and advantages of the invention will be apparent from the following description of the preferred embodiments thereof, and from the claims.
- FIG. 1 is a perspective view of footwear having a sole with a visible, replaceable cushioning cassette in a front-region cavity and another in a heel-region cavity.
- FIG. 2 is a side view of a longitudinal cross-section of the footwear of FIG. 1 taken along section lines2-2 of FIG. 1.
- FIG. 3 is a top plan view of a toe-to-heel midsole section having a cavity for a cushioning cassette in both front and heel regions.
- FIG. 4 is a side plan view of the toe-to-heel midsole section of FIG. 3.
- FIG. 5 is bottom plan view of a toe-to-heel midsole section of FIG. 3.
- FIG. 6 is a top plan view of a front midsole section having a cushioning cassette in its cavity.
- FIG. 7 is a side view of a longitudinal cross-section of the front midsole section of FIG. 6 taken along section lines7-7 of FIG. 6 with a cushioning cassette in the cavity.
- FIG. 8 is a front view of the front midsole section of FIG. 6.
- FIG. 9 is a perspective view of a cushioning cassette.
- FIG. 10 is a top view of a heel midsole section with a cushioning cassette in its cavity.
- FIG. 11 is a side view of the heel midsole section of FIG. 10 with a cushioning cassette in the cavity.
- FIG. 12 is a front view of the heel midsole section of FIG. 10; hidden lines indicate side, ceiling, and bottom walls of closed cells on the front side of the heel midsole section.
- FIG. 13 is a side view of a longitudinal cross-section of the heel midsole section of FIG. 10 taken along section lines13-13 of FIG. 10; a cushioning cassette is not present.
- FIG. 14 is a perspective view of a cushioning cassette.
- FIG. 15 is a transverse cross-sectional view of the cushioning cassette of FIG. 14 taken along section lines15-15 of FIG. 14.
- FIG. 16 is a side view of a longitudinal cross-section of the heel midsole section of FIG. 17 taken along section lines16-16 of FIG. 17; a column-like cushioning cassette is in the front cavity.
- FIG. 17 is a perspective view of two column-like cushioning cassettes that are to be inserted into side openings of corresponding cavities in a heel midsole section.
- FIG. 18 is a perspective view of two column-like cushioning cassettes having notches; both are to be inserted into side openings of corresponding cavities in a heel midsole section.
- FIG. 19 is a perspective view of a heel midsole section having one cavity with four circular inward-oriented notches for holding a side-inserted box-like cushioning cassette.
- FIG. 20 is a side view of a longitudinal cross-section of the heel midsole section of FIG. 19 taken along section lines20-20; a box-like cushioning cassette in its cavity.
- Referring to FIG. 1, one embodiment of footwear (i.e., a shoe) comprising sole2 and upper 3 connected to
sole 2 is identified by thenumber 1.Sole 2 comprisesopaque outsole 4;midsole 5; and an insole (not visible in FIG. 1). In other embodiments, sole 2 may comprise an outsole and a midsole, the outsole being provided to contact a surface, while the midsole directly contacts a wearer's foot, so that no insole is present. While a left-foot shoe is depicted in FIG. 1, it is to be understood that similar elements, differing in enantiomeric configuration, are also present in embodiments of a right-foot shoe. It is to be understood that all elements of the present invention may apply to embodiments of either right-foot or left-foot footwear. - Referring to FIGS. 1 and 2,
midsole 5 comprises toe-to-heel midsole section 10, which is made entirely of clear (i.e., translucent or transparent) material. Sidewalls extending upward fromopaque outsole 4 cover some of the side areas ofmidsole section 10 along the front region and, partially, heel region of sole 2, blocking through these side areas visibility ofcushioning cassettes midsole section 10. However, in this particular embodiment, opening 6 inoutsole 4 provides visibility of cushioningcassette 44 in the front-region cavity, while opening 7 provides visibility of cushioningcassette 53 in the heel-region cavity, through lower clear surfaces of toe-to-heel midsole section 10. - Referring to FIG. 2, a front-region cavity (between open cells8 and 9) holding two-chambered cushioning cassette 44 (having inner chamber 11 and outer chamber 12) and a heel-region cavity (between
open cells 13 and 14) holding thicker cushioning cassette 53 (havinginner chamber 15 and outer chamber 16) are each formed by interior side walls of a periphery of open cells inmidsole section 10. The front-region cavity is accessible by liftinginsole area 17 to permit removal and replacement of cushioningcassette 44, while the heel-region cavity is accessible by liftinginsole area 18 to permit removal and replacement ofthicker cushioning cassette 53. In either case, the lifting ofsock liner 19 occurs with the lifting ofinsole areas midsole section 10, as well as through the lower clear surfaces of toe-to-heel midsole section 10 aboveopenings 6 and 7 inoutsole 4. - In other embodiments of the insole,
insole areas cushioning cassettes insole area 17 andinsole area 18 may simply be separate pads overcushioning cassette 44 andcushioning cassette 53, respectively. However, in such embodiments of the insole,insole area 17 andinsole area 18 may be attached to the lower surface ofsock liner 19, so that the lifting ofsock liner 19 again occurs with the lifting ofinsole areas - Referring to FIG. 3, a toe-to-heel midsole section for a right-foot shoe is identified by the
number 20. Toe-to-heel midsole section 20 is like toe-to-heel midsole section 10 of FIGS. 1 and 2 except for being of a right-foot shoe rather than a left-foot shoe. Other views of toe-to-heel midsole section 20 are depicted in FIGS. 4 and 5. Toe-to-heel midsole sections 10 (of FIGS. 1 and 2) and 20 (of FIGS. 3-5) are made of a clear elastomeric material (as arefront midsole section 40 of FIGS. 6-8 andheel midsole sections 50 of FIGS. 10-13, 70 of FIGS. 16-17, 80 of FIG. 18, and 90 of FIGS. 19-20). The clear material may be transparent, or translucent, though, in either case, the color of a cushioning cassette is visible through the clear material of a sole when viewed from outside of the footwear. - The clear material, which can be based on either thermoplastic or thermosetting resin systems, can be formulated from any elastomeric material that can be made into a clear product with a combination of sufficient strength, flexibility, and durability. As noted in EP Publication No. 0 456 434 A2 (incorporated herein by reference), thermosetting systems are generally preferred because of compatibility of processing techniques and better physical properties. As also noted in EP Publication No. 0 456 434 A2, suitable elastomeric materials include synthetic elastomers based on homo and copolymer systems such as polycondensation polymers (e.g., polyurethanes), ethylene-propylene based copolymers (e.g., EPDM), other synthetic rubber materials (e.g., SBR, neoprene, etc.), vinyl-based polymers (e.g., polyvinyl chloride), polyacrylate copolymers, and the like.
- Referring to FIGS. 3 and 5,
cavity 22 is formed in the front region of toe-to-heel midsole section 20 by interior side walls of a periphery of open cells, likeopen cells cells - Referring again to FIG. 3, interior side walls of open cells form
cavity 22 having a shape that is approximately that of an equatorially-squeezed marshmallow section for receivingcushioning cassette 44 of (FIGS. 1, 2, 6, 7, and 9). In other embodiments of the present invention, the shape ofcavity 22 could greatly vary. - The bottom of
cavity 22 is lined with shorter reticulated wall structure for supportingcushioning cassette 44. In other embodiments, the shorter reticulated wall structure could be in a honeycomb-like arrangement of open cells, each having a largely uniform size. In other embodiments, the reticulated wall structures could be webbed in other dimensions. Walls ofopen cell 27, which typify walls oncavity 22's bottom, are less than about one-third the height of walls like those ofopen cells heel midsole section 20. In other embodiments, heights of walls of open cells likecells cavity 22's bottom. Furthermore, in other embodiments, the cells could be closed, the walls of cells (closed or open) could be reticulated in other dimensions, or the walls of cells could be arranged in a honeycomblike pattern wherein the cells are each of a largely uniform size. - Referring again to FIGS. 3 and 5,
cavity 28 is formed in the heel region of toe-to-heel midsole section 20 by interior side walls of a periphery of open cells, likeopen cells open cells form cavity 28 to be approximately oval in shape, having a diameter between the interior side walls ofopen cells 29 and 30 that is about one-and-a-half times the diameter between the interior side walls ofopen cells - With the interior side walls of the open cells that form heel-
region cavity 28 being higher than those that form front-region cavity 22, the cushioning cassette (53 of FIG. 14) that fits within heel-region cavity 28 differs from the cushioning cassette (44 of FIG. 9) that fits within front-region cavity 22 not only in being approximately oval in shape (rather than being shaped as an equatorially-squeezed marshmallow section), but also in being about twice as high or thick, in this particular embodiment. -
Cavity 28, likecavity 22, has a bottom that also comprises reticulated wall structure for supporting a cushioning cassette. Walls ofopen cell 33 on the bottom ofcavity 28 are about the same height as walls ofopen cell 27 on the bottom ofcavity 22. For eithercavity 22 orcavity 28, the shorter wall height contributes to causing cushioning cassettes, which are typically not as high or thick as the side walls that form each cavity, to protrude above the plane of the top surface of toe-to-heel midsole section 20 in this particular embodiment. Other embodiments of midsole sections—including other toe-to-heel midsole sections, as well as front midsole sections and heel midsole sections—may contain longer or shorter walls, or no walls at all, to cover a cavity's bottom. - Referring to FIG. 4, molded upward extensions, like
upward extension 34, provide surfaces for attaching toe-to-heel midsole section 20 to shoe uppers (like left-foot shoe upper 3 ofshoe 1 in FIG. 1, except for a right-foot shoe). In FIG. 4, dashes or hiddenlines 35 along the outsole-adjacent boundary of toe-to-heel midsole section 20 outline height maximums for interiorly-oriented impressions on the lower surface ofmidsole section 20. - Referring to FIG. 5, toe-to-
heel midsole section 20 is made largely of clear material in this particular embodiment. Areas of potential attachment by an outsole on the lower surface of toe-to-heel midsole section 20 may be marked by swellings or molded discontinuities (not visible in FIG. 5). Similar swellings or molded discontinuities may also be found near the lower surfaces of other embodiments of midsoles sections (e.g., front midsole sections of FIGS. 6-8 or heel midsole sections of FIGS. 10-13 and 16-20). Hidden lines outline where, on the opposite side of toe-to-heel midsole section 20,cavities - Referring to FIG. 6, a front midsole section for a left-foot shoe is identified by the
number 40. Interior side walls of open cells, likeopen cells 47 and 48, form a cavity, approximately the shape of an equatorially-squeezed marshmallow section, for cushioningcassette 44, which is in place. Cushioningcassette 44 may fit snugly within the cavity of either a right-foot or left-foot front midsole section, though the bottom side ofcassette 44 in a cavity of a front midsole section for a right-foot shoe becomes the top side ofcassette 44 in a cavity of a front midsole section for a left-foot shoe, and visa versa. In this particular embodiment, except for sidedness, the dimensions of the cavity are approximately the same as the dimensions ofcavity 22 of toe-to-heel midsole section 20 of FIG. 3. In this particular embodiment,front midsole section 40 is made entirely of clear material, so that cushioningcassette 44 is visible through both the sides and the lower surface offront midsole section 40. - Referring to FIG. 7, a side view of a cross-section of the front midsole section of FIG. 6 is again identified by the
number 40. Molded upward extensions, likeupward extension 42, provide surfaces for attachingfront midsole section 40 to shoe uppers. Cushioningcassette 44 is in the cavity offront midsole section 40. Walls of open cells infront midsole section 40 are also depicted. In this particular embodiment, shorter walls, likewalls cassette 44 on the cavity's bottom have a height similar to, referring again to FIG. 3, the height of the walls ofopen cell 27 on the bottom ofcavity 22. In other embodiments, the height of cell walls on the bottom of cavities may differ markedly. As noted previously for walls of cells on the bottom of cavities for cushioning cassettes, in other embodiments of front midsole sections, longer or shorter walls, or no walls at all, may be found on a cavity's bottom. - Referring to FIG. 8, a front view of a front midsole section for a left-foot shoe is again identified by the
number 40. Molded upward extensions, like upward extension 41, provide surfaces for attaching shoe uppers tofront midsole section 40. Hidden lines along the lower surface indicate the position of walls of open cells on the upper or cell-containing side offront midsole section 40. A cushioning cassette is not present in a cavity offront midsole section 40 in the particular view presented in FIG. 8. - Referring to FIG. 9, one embodiment of a cushioning cassette is identified by the
number 44. Referring also to FIGS. 3 and 5, front-region cavity 22 of left-foot, toe-to-heel midsole section 20 receives, in a snug fit, cushioningcassette 44. Referring also to FIGS. 6 and 7, the cavity of left-footfront midsole section 40 also receives, in a snug fit, cushioningcassette 44. Again, cushioningcassette 44 may fit snugly within the cavity of either a right-foot or left-foot midsole section, though the bottom side ofcassette 44 in a cavity of a midsole section for a right-foot shoe becomes the top side ofcassette 44 in a cavity of a midsole section for a left-foot shoe, and visa versa. - Referring again to FIG. 9, exteriors of inner chamber11 and outer chamber 12 (of FIGS. 2 and 7) are demarcated by
groove 47 in this particular embodiment of cushioningcassette 44. In other embodiments, cushioningcassette 44 may have but one chamber, or comprise two or more chambers. In brief, in other embodiments the shape and chamber configuration of cushioningcassette 44 may vary greatly. Material of which cushioningcassette 44 is preferably made, as well as the containment of a gaseous medium within cushioningcassette 44, is as described later for cushioning cassette 53 (of FIGS. 10-12, 14, and 15) - Referring to FIG. 10, one embodiment of a heel midsole section, from a top view, is identified by the
number 50. Other views ofheel midsole section 50 are depicted in FIGS. 11-13; they are also identified by thenumber 50. - Referring to FIGS.10-13,
cavity 52 is formed inheel midsole section 50 by interior side walls of a periphery of closed cells, likeclosed cells cavity 52, in which cushioningcassette 53 snugly fits, to be roughly oval in shape. In this particular embodiment, the dimensions ofcavity 52 are approximately the same as the dimensions of heel-region cavity 28 of toe-to-heel midsole section 20 of FIG. 3. - As a ceiling wall forms
cells section 40 of FIGS. 6-8, as well as cells of toe-to-heel midsole sections, likesection 20 of FIG. 3, also to be closed cells Referring to FIG. 13, shorter walls, likewalls 58 and 59 of open cells on the bottom ofcavity 50, are similar in height in this particular embodiment towalls cassette 44 of FIG. 7, as well as to walls ofopen cell 33 on the bottom ofcavity 28 of FIG. 3. As noted previously for other midsole sections, these walls on the bottom of the cavity of a heel midsole section may be absent or vary greatly in height. In other embodiments of heel midsole sections, as well as of front midsole sections and toe-to-heel midsole sections, a ceiling wall may also form cells on a cavity's bottom to be closed cells. - Referring to FIGS.1-13, all cell walls—i.e., side, bottom, and ceiling walls of closed cells, or, side and bottom walls of open cells, whether outside or within a cavity—in midsole sections are of a similar thickness in these particular embodiments. In other embodiments of the present invention, however, the thickness of all walls may vary greatly within, as well as between, embodiments. For example, the ceiling wall that forms closed cells of cells of heel midsole section 50 (such as
closed cells heel midsole section 50 in a preferred embodiment. - Referring to FIGS. 14 and 15, one embodiment of a cushioning cassette is identified by the
number 53. Referring also to FIGS. 1-3, 10-12, cushioningcassette 53 is sized to fit snugly within heel-region cavity 28 of toe-to-heel midsole section 20 (of FIG. 3) (or as shown in FIGS. 1 and 2 for toe-to-heel midsole section 10) or withincavity 52 of heel midsole section 50 (as shown in FIGS. 10-12). Cushioningcassette 53 also has outer and inner chambers. In a preferred embodiment, oval torus-shapedouter chamber 16 surrounds stretched pillow-shaped inner chamber 15 (shown in FIGS. 2 and 15). In this particular embodiment, elastomeric material joins the outer walls of the two chambers so as either to allow, or not to allow, sharing of gaseous medium between the chambers through a passageway. In preferred embodiments, the same elastomeric material that joins the two chambers also forms the walls of the chambers. Whether sharing of gaseous medium between chambers is allowed or not allowed, the gaseous medium is held in sealed containment within the cassette if elastomeric material prevents escape of gaseous medium. - The elastomeric material of which cushioning
cassette 53 is preferrably made is a thermoplastic elastomer, such as thermoplastic polyurethane (TPU). The elastomeric material may also be of the following materials, without being limited thereto: adduct rubber, butadiene acrylonitrile rubber, butadiene styrene rubber, chlorinated polyethylene, chlorosulfonated polyethylene, ethylene propylene polymer, fluoroelastomer, high-strength silicone rubber, low-density polyethylene, methyl rubber, natural rubber, neoprene, polyester elastomer, polyether polyurethane, polyethylene/ethylene vinyl acetate copolymer, polyurethane, polyvinyl chloride, sulfide rubber, thermoplastic rubbers, and the like (see U.S. Pat. Nos. 4,817,304 and 5,685,090, each incorporated herein by reference, as well as EP Publication No. 0 456 434 A2, previously incorporated herein by reference). - Referring to FIG. 15, the gaseous medium that fills
chambers chambers 11 and 12 of cushioningcassette 44 of FIG. 9) also preferably comprises clean ambient air, or, more preferably, one or more elements of clean ambient air having lower oxidizing potentials, such as argon. - By way of example, and not limitation, ambient air for a typical terrestrial location is, by volume, approximately 21% oxygen, 77% nitrogen, 1% argon, and 0.3% carbon dioxide, with 0.97% a mixture of other gases like hydrogen, neon, krypton, helium, ozone, and xenon. The filling of a chamber with ambient air as the gaseous medium, does not require that the ambient air be sealed within the chamber for the cassette to provide cushioning, though sealed containment of ambient air within cushioning
cassette 53, or cushioningcassette 44, is preferred, whether or not the contained gaseous medium may exchange betweenchambers chambers 11 and 12 of cassette 44 (of FIGS. 2 and 7). If the elastomeric material of which a cassette is made has a sufficient hysteresis capacity (i.e., a capacity repeatedly to return quickly to an original molded shape despite being repetitively struck or depressed), ambient air (or other gaseous medium) within a cushioning cassette need not be in sealed containment. In other words, if the hysteresis capacity of a cushioning cassette's elastomeric material itself provides sufficient cushioning capacity, requiring that ambient air (or other gaseous medium) be in sealed containment in the elastomeric material of a cushioning cassette may not be necessary. - Referring to FIGS. 11 and 12, while cushioning
cassette 53 is shown as being significantly higher than the top of the side wall of the cavity that it occupies, the heights of cushioning cassettes in other embodiments may vary from being near the tops of the side walls (as for cushioningcassette 44 in FIGS. 2 and 7) to being even further above the tops of the side walls than cushioningcassette 53 is in FIGS. 11 and 12. Furthermore, cushioning cassettes of other embodiments may be single-chambered or comprise more than two chambers. In addition, the thickness of chamber walls may vary from being as thin as soap film to being thicker than midsole section walls, for example, thicker than the walls withinheel midsole section 50. - In addition to ambient air, other gases, without limitation, that may be used to fill chambers of cushioning cassettes (such as
cassettes 44 and 53) in a sealed manner include halogenated alkanes and alkenes such as: bromotrifluoromethane, chlorofluoroethylene, 1,2-dichlorotetrafluoroethane, hexafluoroethane, hexafluoropropylene, monochloropentafluoroethane, monochlorotrifluoromethane, octafluorocyclobutane, perfluorbutane, perfluorocyclobutane, perfluorohexane, perfluoroheptane, perfluoropropane, tetrafluoromethane, 1,1,2-trichloro-1,2,2-trifluoroethane, and the like, as well as other gases, including sulfur hexafluoride (see U.S. Pat. No. 4,817,304 and EP Publication No. 0 456 434 A2, each previously incorporated herein by reference). - Referring to FIGS. 2, 7,9, 14, and 15, in a preferred embodiment, chambers of cushioning cassettes (such as
chambers 11 and 12 of cushioningcassette 44, andchambers cassette 53 contains no valve or other mechanical component to adjust the pressure of the gaseous medium of ambient air within each chamber, though pressure within each chamber may be variously set on manufacture of the cushioning cassette. Since clean ambient air is used to fill each chamber in this particular preferred embodiment, release of potentially environmentally damaging gases, such as chlorofluorocarbons (CFCs), is avoided. - Referring to FIGS.16-20, embodiments of the present invention are depicted wherein column-like cushioning cassettes—such as cassettes 71 (of FIG. 17) or 81 (of FIG. 18)—or box-like cushioning cassettes—such as cassette 91 (of FIG. 20)—may be removed and replaced through a lateral or medial side of a heel midsole section, such as a heel midsole sections 70 (of FIGS. 16 and 17), 80 (of FIG. 18), or 90 (of FIGS. 19 and 20). In these particular embodiments, the side-inserted cushioning cassettes are single-chambered and also are preferably filled with one or more elements of clean ambient clean air. Like cushioning cassettes described earlier, side-inserted cushioning cassettes in other embodiments may have two or more chambers. In addition, other embodiments of side-inserted cushioning may be filled in a sealed manner with a gaseous medium comprising a halogenated alkane, a halogenated alkene, or sulfur hexafluoride.
- Referring to FIG. 16, column-
like cushioning cassette 71 is withincavity 77 ofheel midsole section 70. Side walls of closed cells, likecells form cavity 77 and side walls of other closed cells, likecells form cavity 78 ofheel midsole section 70. - Referring to FIG. 17, side walls of closed cells—like
cells heel midsole section 70form cavities like cushioning cassettes 71. Since side walls of closed cells, likecells form cavity 77, and side walls of other closed cells, likecells form cavity 78 ofheel midsole section 70, it can be said of these embodiments that interior walls of a periphery of cells form inmidsole section 70 at least one cavity for receiving side-insertedcushioning cassette 71. - Referring to FIG. 18, side-inserted, column-like cushioning cassettes contain
notches 82 to hold the cassettes to mating, notch-receivingindentations 83 inheel midsole section 80. Side walls of open cells—likecells heel midsole section 80form cavities 87 and 88 for receiving side-inserted, column-like cushioning cassettes 81. - Referring to FIGS. 19 and 20, side-inserted, box-
like cushioning cassette 91 containsindentations 92 to receive inward-orientednotches 93 of the cavity ofheel midsole section 90. Again, since interior side walls of closed cells, likecells midsole section 90 at least one cavity for receiving side-insertedcushioning cassette 91, it can be said of these embodiments that interior walls of a periphery of cells form inmidsole section 90 at least one cavity for receiving side-inserted, box-like cushioning cassette 91. - Referring again to FIG. 2, a method for modifying a color pattern of
shoe 1 comprises lifting insole area 18 (sock liner 19 being lifted with insole area 18), removingcushioning cassette 53 from the cavity of the heel region of toe-to-heel midsole section 10 ofshoe 1, and replacing removedcassette 53 with another of a different color. Another method for modifying a color pattern ofshoe 1 comprises lifting insole area 17 (sock liner 19 being lifted with insole area 17), removingcushioning cassette 44 from the cavity of the front region of toe-to-heel midsole section 10 ofshoe 1, and replacing removedcassette 44 with another of a different color. - Referring again to FIG. 2, a method for modifying impact response capacity of
shoe 1 comprises lifting insole area 18 (sock liner 19 being lifted with insole area 18), removingcushioning cassette 53 from the cavity of the heel region of toe-to-heel midsole section 10 ofshoe 1, and replacing removedcassette 53 with another having a different cushioning capacity. Another method for modifying impact response capacity ofshoe 1 comprises lifting insole area 17 (sock liner 19 being lifted with insole area 17), removingcushioning cassette 44 from the cavity of the front region of toe-to-heel midsole section 10 ofshoe 1, and replacing removedcassette 44 with another having a different cushioning capacity. - Similar methods (for modifying a color pattern or for modifying impact response capacity of footwear), but not including the lifting of an insole area, may be used for embodiments either lacking an insole, or having cassettes in cavities that are accessible without lifting an insole (for example, a cavity amenable to receiving cassettes inserted from a sole side, as in the heel midsole sections of FIGS.16-20, or a front or a toe-to-heel midsole section having a cavity for a side-inserted cassette in front or heel regions). In embodiments lacking an insole, but having a sock liner, the removing of a cassette from a cavity accessible through an opening under the sock liner also lifts the sock liner so that a cassette (of a different color or a different cushioning capacity) may be placed in the cavity.
- With embodiments of the present invention, an article of footwear, and particularly an athletic or sport shoe, may be tailored to display a particular color pattern. In addition, the footwear may be tailored to have an appropriate impact response capacity. Both a particular color pattern and an impact response capacity may be optimized for activities of the wearer of the footwear.
- It is also to be understood that the visible, replaceable cushioning cassette apparatus of the present invention may be utilized in other articles of manufacture wherein it is desired to alter the cushioning or pressure resistance of the article or change the color or color pattern of the article. Accordingly, the visible, replaceable cushioning cassette, as provided by the present invention, may be utilized, without limitation, in grips and gripping elements of all kinds (including, for example, handles for suitcases or levers for furniture and appliances), pads or padding elements of all kinds (including, for example, bottom units for feet of chairs, stools, or stands; or seat units for furniture, buses, or airplanes), cushioning components of all kinds (including, for example, packaging pads and automotive or aerospace cushioning devices), and the like.
- While footwear of the present invention, i.e., footwear having a sole with a visible, replaceable cushioning cassette, has been described in connection with preferred embodiments, the invention is not intended to be limited to the particular embodiments described. On the contrary, the invention is intended to cover such alternatives, modifications, and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims.
Claims (57)
1. Footwear, comprising:
a sole; and
an upper connected to said sole, said sole having at least one cavity therein for receiving a cushioning cassette, said cavity being accessible to permit removal and replacement of said cassette, which, when within said cavity, is visible through clear material of said sole when viewed from outside of said footwear.
2. The footwear of claim 1 , wherein a bottom of said cavity in said sole comprises a reticulated wall structure.
3. The footwear of claim 1 , wherein said sole contains a cassette in said cavity.
4. The footwear of claim 3 , wherein said cassette is colored.
5. The footwear of claim 3 , wherein said cassette contains at least one chamber that is filled with a gaseous medium in sealed containment within said cassette.
6. The footwear of claim 5 , wherein said gaseous medium comprises one or more elements of ambient air.
7. The footwear of claim 5 , wherein said gaseous medium comprises a halogenated alkane, a halogenated alkene, or sulfur hexafluoride.
8. Footwear, comprising:
a sole; and
an upper connected to said sole,
said sole comprising:
an outsole; and
a midsole,
said midsole comprising a midsole section having at least one cavity therein for receiving a cushioning cassette, said cavity being accessible to permit removal and replacement of said cassette, which, when within said cavity, is visible through clear material of said sole when viewed from outside of said footwear.
9. The footwear of claim 8 , wherein said midsole section is made largely of clear material.
10. The footwear of claim 8 , wherein in said midsole section is a heel midsole section.
11. The footwear of claim 8 , wherein said midsole section is a front midsole section.
12. The footwear of claim 8 , wherein said midsole section is a toe-to-heel midsole section.
13. The footwear of claim 8 , wherein said midsole section contains a cassette in said cavity.
14. The footwear of claim 13 , wherein said cassette is colored.
15. The footwear of claim 13 , wherein said cassette contains at least one chamber that is filled with a gaseous medium in sealed containment within said cassette.
16. The footwear of claim 15 , wherein said gaseous medium comprises one or more elements of ambient air.
17. The footwear of claim 15 , wherein said gaseous medium comprises a halogenated alkane, a halogenated alkene, or sulfur hexafluoride.
18. Footwear, comprising:
a sole; and
an upper connected to said sole,
said sole comprising:
an outsole;
a midsole,
said midsole comprising a midsole section having at least one cavity therein for receiving a cushioning cassette, said cavity being accessible to permit removal and replacement of said cassette, which, when within said cavity, is visible through clear material of said sole when viewed from outside of said footwear; and
an insole.
19. The footwear of claim 18 , wherein said midsole section is made largely of clear material.
20. The footwear of claim 18 , wherein in said midsole section is a heel midsole section.
21. The footwear of claim 18 , wherein said midsole section is a front midsole section.
22. The footwear of claim 18 , wherein said midsole section is a toe-to-heel midsole section.
23. The footwear of claim 18 , wherein said midsole section contains a cassette in said cavity.
24. The footwear of claim 23 , wherein said cassette is colored.
25. The footwear of claim 23 , wherein said cassette contains at least one chamber that is filled with a gaseous medium in sealed containment within said cassette.
26. The footwear of claim 25 , wherein said gaseous medium comprises one or more elements of ambient air.
27. The footwear of claim 25 , wherein said gaseous medium comprises a halogenated alkane, a halogenated alkene, or sulfur hexafluoride.
28. Footwear, comprising:
a sole; and
an upper connected to said sole,
said sole comprising:
an outsole; and
a midsole,
said midsole comprising a midsole section, wherein walls of a periphery of cells form in said midsole section at least one cavity for receiving a cushioning cassette, said cavity being accessible to permit removal and replacement of said cassette, which, when within said cavity, is visible through clear material of said sole when viewed from outside of said footwear.
29. The footwear of claim 28 , wherein said midsole section is made largely of clear material.
30. The footwear of claim 28 , wherein in said midsole section is a heel midsole section.
31. The footwear of claim 28 , wherein said midsole section is a front midsole section.
32. The footwear of claim 28 , wherein said midsole section is a toe-to-heel midsole section.
33. The footwear of claim 28 , wherein said midsole section contains a cassette in said cavity.
34. The footwear of claim 33 , wherein said cassette is colored.
35. The footwear of claim 33 , wherein said cassette contains at least one chamber that is filled with a gaseous medium in sealed containment within said cassette.
36. The footwear of claim 35 , wherein said gaseous medium comprises one or more elements of ambient air.
37. The footwear of claim 35 , wherein said gaseous medium comprises a halogenated alkane, a halogenated alkene, or sulfur hexafluoride.
38. Footwear, comprising:
a sole; and
an upper connected to said sole,
said sole comprising:
an outsole;
a midsole,
said midsole comprising a midsole section, wherein walls of a periphery of cells form in said midsole section at least one cavity for receiving a cushioning cassette, said cavity being accessible to permit removal and replacement of said cassette, which, when within said cavity, is visible through clear material of said sole when viewed from outside of said footwear; and
an insole.
39. The footwear of claim 38 , wherein said midsole section is made largely of clear material.
40. The footwear of claim 38 , wherein in said midsole section is a heel midsole section.
41. The footwear of claim 38 , wherein said midsole section is a front midsole section.
42. The footwear of claim 38 , wherein said midsole section is a toe-to-heel midsole section.
43. The footwear of claim 38 , wherein said midsole section contains a cassette in said cavity.
44. The footwear of claim 43 , wherein said cassette is colored.
45. The footwear of claim 43 , wherein said cassette contains at least one chamber that is filled with a gaseous medium in sealed containment within said cassette.
46. The footwear of claim 45 , wherein said gaseous medium comprises one or more elements of ambient air.
47. The footwear of claim 45 , wherein said gaseous medium comprises a halogenated alkane, a halogenated alkene, or sulfur hexafluoride.
48. A method for modifying impact response capacity in footwear of claim 3 , comprising
removing said cassette from said cavity; and
replacing in said cavity a cassette having a different cushioning capacity.
49. A method for modifying color pattern in footwear of claim 4 , comprising
removing said cassette from said cavity; and
replacing in said cavity a cassette having a different color.
50. A method for modifying impact response capacity in footwear of claim 13 , comprising
removing said cassette from said cavity; and
replacing in said cavity a cassette having a different cushioning capacity.
51. A method for modifying color pattern in footwear of claim 14 , comprising
removing said colored cassette from said cavity; and
replacing in said cavity a cassette having a different color.
52. A method for modifying impact response capacity in footwear of claim 23 , comprising
lifting said insole;
removing said cassette from said cavity; and
replacing in said cavity a cassette having a different cushioning capacity.
53. A method for modifying color pattern in footwear of claim 24 , comprising
lifting said insole;
removing said colored cassette from said cavity; and
replacing in said cavity a cassette having a different color.
54. A method for modifying impact response capacity in footwear of claim 33 , comprising
removing said cassette from said cavity; and
replacing in said cavity a cassette having a different cushioning capacity.
55. A method for modifying color pattern in footwear of claim 34 , comprising
removing said colored cassette from said cavity; and
replacing in said cavity a cassette having a different color.
56. A method for modifying impact response capacity in footwear of claim 43 , comprising
lifting said insole;
removing said cassette from said cavity; and
replacing in said cavity a cassette having a different cushioning capacity.
57. A method for modifying color pattern in footwear of claim 44 , comprising
lifting said insole;
removing said colored cassette from said cavity; and
replacing in said cavity a cassette having a different color.
Priority Applications (3)
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AU69524/00A AU6952400A (en) | 1999-06-18 | 2000-06-14 | Footwear with visible, replaceable cushioning cassette |
PCT/US2000/040204 WO2000078171A1 (en) | 1999-06-18 | 2000-06-14 | Footwear with visible, replaceable cushioning cassette |
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US09/336,361 US20020050077A1 (en) | 1999-06-18 | 1999-06-18 | Footwear with visible, replaceable cushioning cassette |
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US20020050077A1 true US20020050077A1 (en) | 2002-05-02 |
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US09/336,361 Abandoned US20020050077A1 (en) | 1999-06-18 | 1999-06-18 | Footwear with visible, replaceable cushioning cassette |
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US (1) | US20020050077A1 (en) |
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AU6952400A (en) | 2001-01-09 |
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Owner name: IN-STRIDE, INC., TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WANG, JACK;SKAJA, JOSEPH J.;ADAMS, THOMAS M.;REEL/FRAME:010405/0839;SIGNING DATES FROM 19991102 TO 19991110 |
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