US20040244221A1 - Hybrid footwear liner - Google Patents
Hybrid footwear liner Download PDFInfo
- Publication number
- US20040244221A1 US20040244221A1 US10/458,744 US45874403A US2004244221A1 US 20040244221 A1 US20040244221 A1 US 20040244221A1 US 45874403 A US45874403 A US 45874403A US 2004244221 A1 US2004244221 A1 US 2004244221A1
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- US
- United States
- Prior art keywords
- rigid
- boot liner
- liner
- boot
- semi
- 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.)
- Abandoned
Links
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 24
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 23
- 230000002045 lasting effect Effects 0.000 claims abstract description 14
- 239000006260 foam Substances 0.000 claims abstract description 12
- 238000010276 construction Methods 0.000 claims abstract description 10
- 210000002683 foot Anatomy 0.000 claims description 31
- 210000003423 ankle Anatomy 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 9
- 239000003351 stiffener Substances 0.000 claims description 5
- 230000002745 absorbent Effects 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000006261 foam material Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/02—Soles; Sole-and-heel integral units characterised by the material
- A43B13/12—Soles with several layers of different materials
-
- 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
- A43B13/22—Soles made slip-preventing or wear-resisting, e.g. by impregnation or spreading a wear-resisting layer
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B19/00—Shoe-shaped inserts; Inserts covering the instep
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B5/00—Footwear for sporting purposes
- A43B5/04—Ski or like boots
- A43B5/0405—Linings, paddings or insertions; Inner boots
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B5/00—Footwear for sporting purposes
- A43B5/04—Ski or like boots
- A43B5/0427—Ski or like boots characterised by type or construction details
- A43B5/0482—Ski or like boots characterised by type or construction details made from materials with different rigidities
Definitions
- the present invention relates generally to boot liners and, more particularly, to boot liners for high performance, sports related boots.
- High performance footwear typically boots—are used in many sporting activities such as skiing, snowboarding, skating, hiking, and the like.
- Such high performance footwear must satisfy a number of competing demands.
- snowboard boots must be rugged enough to reliably withstand the rigors of high-intensity snowboarding and the wet and freezing environmental conditions.
- the snowboard boot is firmly attached to the snowboard with a binding.
- the user's foot and boot must be tightly coupled—that is, there should be minimal slop or play between the user's foot and the boot.
- the snowboard boot or other high performance footwear must provide a high level of comfort, including protection from the elements, for extended, often grueling, usage.
- boots include a relatively soft, flexible liner that is disposed within the boot, between the boot and the user's foot.
- the liner may be removable from the boot or permanently attached to the boot.
- a liner provides many benefits.
- the liner generally conforms better to the shape of the user's foot, providing a more exact fit between the user and the boot.
- the liner also helps to keep the user's foot warm, provides padding to the user, absorbs accumulated perspiration and other moisture, and provides a comfortable, snug fit between the user's foot and ankle, and the boot.
- the liner may provide shock absorption to the user's foot, and may provide additional support, particularly to the user's ankle.
- Removable liners have the additional advantage of being easily cleaned and replaced, as needed.
- a soft liner may result in a poorer coupling between the user's foot and the boot, due to the liner being able to move somewhat within the boot.
- Prior art boot liners may be simply sock-type liners, wherein the liner is generally L-shaped and tubular, with sufficient elasticity and flexibility to receive the user's foot.
- a longitudinal vamp or slit and tongue may be provided in the liner to facilitate putting on the liner and boot.
- the liner may also include a lacing system for tightening the liner about the user's leg and ankle.
- the liner must be sufficiently flexible to be inserted into the boot and be comfortable to the user, preferably without interfering with the flexibility of the boot.
- Ethylene vinyl acetate (EVA) has the desirable characteristics of pliability and compressibility, for cushioning and comfort, while also being relatively rugged and lightweight.
- EVA can be thermoformed to a three-dimensional shape that more closely conforms to the shape of the user's foot.
- a liner made from EVA will pack outwardly away from the user's foot at the bottom of the liner, from wear and flexing over a relatively short time. Such packing out may result in a degradation in the quality of the fit between the liner and the boot, reduced comfort to the user, and frequent discarding and replacement of the liner.
- EVA pliability and flexibility
- the pliability and flexibility of EVA while providing comfort and cushioning, may not provide a sufficiently rigidity or support to create a responsive fit, particularly about the ankle of the user.
- the interface between the boot and the user's ankle and lower leg is too loose or soft, it is more difficult for the user to achieve a high level of control, particularly in competitive settings where high performance is a priority.
- a novel hybrid boot liner is disclosed that provides an improved coupling between the boot liner and the boot, while also providing good ankle support and a comfortable fit for the user.
- the boot liner includes an upper having a semi-rigid top portion that is adapted to wrap about the lower leg of the user, proving a relatively sturdy fit thereto, and a flexible bottom portion that covers the user's foot and malleoli.
- a semi-rigid sole is attached to the lower edge of the bottom portion of the upper, the sole providing a sturdy and dimensionally stable base to the liner that is sized to closely fit within the boot.
- the sole includes a lasting board, which is stitchedly attached to the bottom portion of the upper, and an outsole that is affixed to the lasting board and wraps about a portion of the upper.
- the top portion and the bottom portion of the upper are fixedly attached to each other with stitches.
- the flexible bottom portion of the upper includes a resilient layer made from an ethylene vinyl acetate foam.
- the flexible bottom portion may also include a slick outer layer that facilitates insertion of the liner into the boot, and an absorbent inner lining.
- the semi-rigid top portion is a stitched construction including a protective outer lining affixed to a stiffening member, a cushioning inner layer, and a soft inner lining.
- the liner includes a vamp opening, and the liner further includes a strap assembly that extends across the vamp opening and is operative to tighten the liner about the ankle of the user.
- FIG. 1 is a perspective view of a boot liner, in accordance with the present invention, shown being inserted into a snowboard boot;
- FIG. 2 is a perspective view of a boot liner, shown in FIG. 1, in isolation;
- FIG. 3 is a cross-sectional side view of the boot liner, shown in FIG. 2, with the strap assembly omitted for clarity;
- FIG. 4 is an exploded, disassembled side view of the boot liner, shown in FIG. 2.
- FIG. 1 shows a boot liner 100 , exemplary of the present invention, and positioned to be inserted into a snowboard boot 90 .
- the snowboard boot 90 shown is of conventional construction and includes a relatively rugged and weatherproof upper 92 that is attached to a relatively rigid sole 94 .
- the liner of the present invention is disclosed with reference to a conventional snowboard boot for illustrative purposes, the invention is not intended to be limited to such boots, and it will be appreciated that the present invention may also be used with other footwear.
- the boot liner 100 is sized and shaped to be inserted fully into the boot 90 , such that the outer surface of the boot liner 100 conforms relatively closely to the inner surface of the snowboard boot 90 .
- the liner 100 includes a semi-rigid sole 140 fixedly attached to a hybrid upper 101 , the upper 101 including a top portion 110 that is adapted to wrap generally about the lower leg of a user, and a bottom portion 120 that generally covers the top of a user's foot.
- the upper 101 includes a vamp opening 102 , and a tongue 104 that extends generally through the vamp opening 102 .
- a strap and lace assembly 150 is also provided to secure the vamp opening 102 in a generally closed position.
- FIG. 2 shows a perspective view of the liner 100 (with the user's leg 88 shown in phantom);
- FIG. 3 shows a cross-sectional side view, taken generally through a longitudinal center plane of the boot liner 100 ;
- FIG. 4 shows a disassembled exploded view of the boot liner 100 .
- the boot liner 100 includes an upper 101 having a hybrid construction that is fixedly attached to a semi-rigid sole 140 .
- the upper 101 includes a relatively stiff or semi-rigid top portion 110 that is shaped and sized to wrap about a lower portion of a user's leg 88 .
- the front of the top portion 110 is split, defining an upper vamp opening 112 .
- An upper tongue portion 114 extends generally through the upper vamp opening 112 .
- the upper 101 also includes a relatively flexible and pliable bottom portion 120 that is shaped to generally cover the upper surface and sides of a user's foot and malleoli (not shown).
- the front of the bottom portion 120 is split, defining a lower vamp opening 122 .
- a lower tongue portion 124 extends upwardly generally from the toe 126 of the bottom portion 120 through the lower vamp opening 122 .
- the lower tongue portion 124 may be formed integrally with the bottom portion 120 of the upper 101 .
- top portion 110 and the bottom portion 120 of the upper 101 are attached to each other—for example, by stitching 129 —to form the upper 101 , wherein the upper tongue portion 114 is also attached the lower tongue portion 124 , to cooperatively form a tongue 104 that generally extends through the vamp opening 102 cooperatively formed by the upper vamp opening 112 and the lower vamp opening 122 .
- the semi-rigid top portion 110 of the upper 101 in the disclosed embodiment is a stitched construction having a protective outer layer 111 bonded to a stiffener 113 , a cushioning layer 115 , and an inner lining 117 .
- the stiffener 113 may be made from any suitable semi-rigid material, such as polyurethane.
- An example of an appropriate cushioning layer 115 material is a skived foam, although other cushioning materials may alternatively be used, as are known in the art.
- the inner lining 117 is preferably a soft, absorbent fabric.
- the upper tongue portion 114 is similar in construction to the top portion 110 .
- the bottom portion 120 of the upper 101 in contrast to the top portion 110 , is relatively soft and pliable, preferably constructed with a flexible foam material and, most preferably, with a thermoformed ethylene vinyl acetate (“EVA”).
- EVA provides good cushioning, flexibility, and thermal properties, and is formable into a complex, three-dimensional shape to more accurately accommodate the complicated shape of a user's foot. It should be appreciated that the flexibility and formability of the lower portion is advantageous because, although the lower leg 88 of a user is relatively simple in geometry and inflexible, a user's foot is much more complicated in shape and is very flexible.
- the bottom portion 120 of the upper 101 includes a relatively slick outer layer 121 (such as a nylon fabric), a thick EVA layer 125 , and a soft and absorbent inner lining 127 .
- the inner lining 127 may be made from the same material as the inner lining 117 of the top portion 110 of the upper 101 .
- the relatively slick outer layer 121 facilitates insertion and removal of the liner 100 from the boot 90 (see FIG. 1).
- the EVA layer 125 may preferably be thermoformed to a shape that comfortably accommodates the user's foot and lower ankle.
- the interface between the top portion 110 and bottom portion 120 of the upper 101 i.e., the stitching 129 , is preferably disposed just above the malleoli of the user's ankle, such that these protuberances are comfortably wrapped with the relatively flexible bottom portion 120 of the upper 101 .
- the upper 101 may also include a securing device, such as a strap and lace assembly 150 , comprising a strap plate 152 attached to the back side of the upper top portion 110 and a plurality of straps 154 that slidably engage the strap plate 150 .
- the straps 154 each define left and right loops or lace keepers 156 (only right lace keepers are shown) that accommodate a lace 158 .
- the strap and lace assembly 150 provide a mechanism permitting the user to tighten the liner 100 and, in particular, the relatively rigid liner upper portion 110 about the user's lower leg.
- the sole 140 of the liner 100 of the disclosed embodiment includes a semi-rigid lasting board 160 that is attached to a lower edge 108 of the bottom portion 120 of the upper 101 , preferably by stitching about the periphery of the lasting board 160 .
- the lasting board 160 provides a secure and stable platform for the user's foot.
- a contoured sock liner or footbed 170 as are known in the art, which may be removable from the liner 100 is also provided.
- the footbed 150 is sized to fit closely within the inner wall of the upper 101 near the lower edge 108 , and provides a comfortable and padded fit for the bottom of the user's foot.
- the sole 140 also includes a rugged outsole 142 , which is affixed to the undersurface of the lasting board 160 , and wraps about the lower edge of the bottom portion 120 of the upper 101 .
- the outsole 142 may be made of any suitable outsole material, as is well known in the art.
- the outsole 142 provides a nonskid undersurface with good wear properties, such that user can walk about in the liner 100 , at least briefly, without damaging the liner 100 .
- the sole 140 provides a dimensionally stable lower surface that conforms closely to the boot 90 , providing the user with a reliably responsive interface with the boot 90 , and eliminates the packing out problems associated with some prior art boot liners, as discussed above.
- the outsole 142 is made from a second EVA foam material that is more rigid than the EVA foam used in the bottom portion 120 of the upper 101 .
- the liner construction disclosed herein permits the designer to include secondary cushioning elements normally associated with outer footwear.
- the secondary cushioning elements may be an air cell 144 disposed generally within the foam outsole 142 .
- Other secondary cushioning elements include, for example, one or more sections of outsole utilizing a different EVA or other material having a lower durometer or hardness, or a gel insert.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
A flexible boot liner (100) having a flexible upper (101) and a semi-rigid sole (140) that provides durability, walkability, and a dimensionally stable fit within a boot (90). The sole includes a lasting board (160) that is fixedly attached to the upper and a nonskid outsole (142). Secondary cushioning devices such as an air cell (144) may also be incorporated into the sole. The upper is of hybrid construction including a relatively flexible bottom portion (120) thermoformed from an ethylene vinyl acetate foam that covers the foot and the malleoli of the user, and a semi-rigid upper portion (110) that wraps about the lower leg of the user. A strap assembly (150) is provided to secure the liner about the foot of the user.
Description
- The present invention relates generally to boot liners and, more particularly, to boot liners for high performance, sports related boots.
- High performance footwear—typically boots—are used in many sporting activities such as skiing, snowboarding, skating, hiking, and the like. Such high performance footwear must satisfy a number of competing demands. For example, snowboard boots must be rugged enough to reliably withstand the rigors of high-intensity snowboarding and the wet and freezing environmental conditions. The snowboard boot is firmly attached to the snowboard with a binding. However, for the user to achieve optimal performance, the user's foot and boot must be tightly coupled—that is, there should be minimal slop or play between the user's foot and the boot. Finally, the snowboard boot or other high performance footwear must provide a high level of comfort, including protection from the elements, for extended, often grueling, usage.
- In order to meet these different requirements, very often such boots include a relatively soft, flexible liner that is disposed within the boot, between the boot and the user's foot. The liner may be removable from the boot or permanently attached to the boot. A liner provides many benefits. For example, the liner generally conforms better to the shape of the user's foot, providing a more exact fit between the user and the boot. The liner also helps to keep the user's foot warm, provides padding to the user, absorbs accumulated perspiration and other moisture, and provides a comfortable, snug fit between the user's foot and ankle, and the boot. The liner may provide shock absorption to the user's foot, and may provide additional support, particularly to the user's ankle. Removable liners have the additional advantage of being easily cleaned and replaced, as needed. A soft liner, however, may result in a poorer coupling between the user's foot and the boot, due to the liner being able to move somewhat within the boot.
- Prior art boot liners may be simply sock-type liners, wherein the liner is generally L-shaped and tubular, with sufficient elasticity and flexibility to receive the user's foot. A longitudinal vamp or slit and tongue may be provided in the liner to facilitate putting on the liner and boot. The liner may also include a lacing system for tightening the liner about the user's leg and ankle. The liner must be sufficiently flexible to be inserted into the boot and be comfortable to the user, preferably without interfering with the flexibility of the boot. Ethylene vinyl acetate (EVA) has the desirable characteristics of pliability and compressibility, for cushioning and comfort, while also being relatively rugged and lightweight. EVA can be thermoformed to a three-dimensional shape that more closely conforms to the shape of the user's foot. However, it has been found that, over time, a liner made from EVA will pack outwardly away from the user's foot at the bottom of the liner, from wear and flexing over a relatively short time. Such packing out may result in a degradation in the quality of the fit between the liner and the boot, reduced comfort to the user, and frequent discarding and replacement of the liner.
- In addition, the pliability and flexibility of EVA, while providing comfort and cushioning, may not provide a sufficiently rigidity or support to create a responsive fit, particularly about the ankle of the user. In many sports, such as snowboarding and skiing, it is desirable to provide sturdy and stable support to the user's ankle to permit the user to quickly and responsively exert desired forces on the snowboard or skis using the strength and leverage from the user's leg. If the interface between the boot and the user's ankle and lower leg is too loose or soft, it is more difficult for the user to achieve a high level of control, particularly in competitive settings where high performance is a priority. The use of an EVA foam for the upper portion of the liner-that is the portion of the liner that wraps about the lower leg of the user-reduces the responsiveness of the fit between the user and the boot.
- There remains a need, therefore, for a durable boot liner that provides sufficient support about the ankle of the user and a tight fit between the liner and the boot, while also providing a comfortable fit for the user.
- A novel hybrid boot liner is disclosed that provides an improved coupling between the boot liner and the boot, while also providing good ankle support and a comfortable fit for the user.
- The boot liner includes an upper having a semi-rigid top portion that is adapted to wrap about the lower leg of the user, proving a relatively sturdy fit thereto, and a flexible bottom portion that covers the user's foot and malleoli. A semi-rigid sole is attached to the lower edge of the bottom portion of the upper, the sole providing a sturdy and dimensionally stable base to the liner that is sized to closely fit within the boot.
- In an embodiment of the invention, the sole includes a lasting board, which is stitchedly attached to the bottom portion of the upper, and an outsole that is affixed to the lasting board and wraps about a portion of the upper.
- In an embodiment of the invention, the top portion and the bottom portion of the upper are fixedly attached to each other with stitches.
- In an embodiment of the invention, the flexible bottom portion of the upper includes a resilient layer made from an ethylene vinyl acetate foam. The flexible bottom portion may also include a slick outer layer that facilitates insertion of the liner into the boot, and an absorbent inner lining.
- In an embodiment of the invention, the semi-rigid top portion is a stitched construction including a protective outer lining affixed to a stiffening member, a cushioning inner layer, and a soft inner lining.
- In an embodiment of the invention, the liner includes a vamp opening, and the liner further includes a strap assembly that extends across the vamp opening and is operative to tighten the liner about the ankle of the user.
- The foregoing aspects and many of the attendant advantages of this invention will become more readily appreciated as the same become better understood by reference to the following detailed description, when taken in conjunction with the accompanying drawings, wherein:
- FIG. 1 is a perspective view of a boot liner, in accordance with the present invention, shown being inserted into a snowboard boot;
- FIG. 2 is a perspective view of a boot liner, shown in FIG. 1, in isolation;
- FIG. 3 is a cross-sectional side view of the boot liner, shown in FIG. 2, with the strap assembly omitted for clarity; and
- FIG. 4 is an exploded, disassembled side view of the boot liner, shown in FIG. 2.
- An embodiment of a hybrid liner according to the present invention will now be described, with reference to the figures, wherein like numbers represent like parts. FIG. 1 shows a
boot liner 100, exemplary of the present invention, and positioned to be inserted into asnowboard boot 90. Thesnowboard boot 90 shown is of conventional construction and includes a relatively rugged and weatherproof upper 92 that is attached to a relatively rigid sole 94. Although the liner of the present invention is disclosed with reference to a conventional snowboard boot for illustrative purposes, the invention is not intended to be limited to such boots, and it will be appreciated that the present invention may also be used with other footwear. Theboot liner 100 is sized and shaped to be inserted fully into theboot 90, such that the outer surface of theboot liner 100 conforms relatively closely to the inner surface of thesnowboard boot 90. As discussed in more detail below, theliner 100 includes asemi-rigid sole 140 fixedly attached to a hybrid upper 101, the upper 101 including atop portion 110 that is adapted to wrap generally about the lower leg of a user, and abottom portion 120 that generally covers the top of a user's foot. The upper 101 includes a vamp opening 102, and atongue 104 that extends generally through the vamp opening 102. A strap andlace assembly 150 is also provided to secure the vamp opening 102 in a generally closed position. - The
boot liner 100 will now be described in detail, with reference to FIGS. 2-4, wherein FIG. 2 shows a perspective view of the liner 100 (with the user'sleg 88 shown in phantom); FIG. 3 shows a cross-sectional side view, taken generally through a longitudinal center plane of theboot liner 100; and FIG. 4 shows a disassembled exploded view of theboot liner 100. Theboot liner 100 includes an upper 101 having a hybrid construction that is fixedly attached to asemi-rigid sole 140. The upper 101 includes a relatively stiff or semi-rigidtop portion 110 that is shaped and sized to wrap about a lower portion of a user'sleg 88. The front of thetop portion 110 is split, defining an upper vamp opening 112. Anupper tongue portion 114 extends generally through the upper vamp opening 112. - The upper101 also includes a relatively flexible and
pliable bottom portion 120 that is shaped to generally cover the upper surface and sides of a user's foot and malleoli (not shown). The front of thebottom portion 120 is split, defining a lower vamp opening 122. Alower tongue portion 124 extends upwardly generally from thetoe 126 of thebottom portion 120 through the lower vamp opening 122. Thelower tongue portion 124 may be formed integrally with thebottom portion 120 of the upper 101. Thetop portion 110 and thebottom portion 120 of the upper 101 are attached to each other—for example, by stitching 129—to form the upper 101, wherein theupper tongue portion 114 is also attached thelower tongue portion 124, to cooperatively form atongue 104 that generally extends through the vamp opening 102 cooperatively formed by the upper vamp opening 112 and the lower vamp opening 122. - As seen most clearly in FIG. 3, the semi-rigid
top portion 110 of the upper 101 in the disclosed embodiment is a stitched construction having a protectiveouter layer 111 bonded to astiffener 113, acushioning layer 115, and aninner lining 117. Thestiffener 113 may be made from any suitable semi-rigid material, such as polyurethane. An example of anappropriate cushioning layer 115 material is a skived foam, although other cushioning materials may alternatively be used, as are known in the art. Theinner lining 117 is preferably a soft, absorbent fabric. Theupper tongue portion 114 is similar in construction to thetop portion 110. Although the particular construction for thetop portion 110 described is currently the preferred embodiment, it will be appreciated that other relatively rigid or semi-rigid constructions may alternatively be used, without departing from the spirit and scope of the present invention. - The
bottom portion 120 of the upper 101, in contrast to thetop portion 110, is relatively soft and pliable, preferably constructed with a flexible foam material and, most preferably, with a thermoformed ethylene vinyl acetate (“EVA”). EVA provides good cushioning, flexibility, and thermal properties, and is formable into a complex, three-dimensional shape to more accurately accommodate the complicated shape of a user's foot. It should be appreciated that the flexibility and formability of the lower portion is advantageous because, although thelower leg 88 of a user is relatively simple in geometry and inflexible, a user's foot is much more complicated in shape and is very flexible. - In the preferred embodiment the
bottom portion 120 of the upper 101 includes a relatively slick outer layer 121 (such as a nylon fabric), athick EVA layer 125, and a soft and absorbentinner lining 127. Theinner lining 127 may be made from the same material as theinner lining 117 of thetop portion 110 of the upper 101. The relatively slickouter layer 121 facilitates insertion and removal of theliner 100 from the boot 90 (see FIG. 1). TheEVA layer 125 may preferably be thermoformed to a shape that comfortably accommodates the user's foot and lower ankle. The interface between thetop portion 110 andbottom portion 120 of the upper 101, i.e., thestitching 129, is preferably disposed just above the malleoli of the user's ankle, such that these protuberances are comfortably wrapped with the relatively flexiblebottom portion 120 of the upper 101. - Referring again to FIG. 2, the upper101 may also include a securing device, such as a strap and
lace assembly 150, comprising astrap plate 152 attached to the back side of the uppertop portion 110 and a plurality ofstraps 154 that slidably engage thestrap plate 150. In the disclosed embodiment, thestraps 154 each define left and right loops or lace keepers 156 (only right lace keepers are shown) that accommodate alace 158. The strap andlace assembly 150 provide a mechanism permitting the user to tighten theliner 100 and, in particular, the relatively rigid linerupper portion 110 about the user's lower leg. Although the preferred lace assembly has been described, it should be understood that other mechanisms for tightening theliner 100 about the foot and ankle of the user may alternatively be utilized, including, for example, hook and loop type straps, separate lace keepers attached directly at the vamp portion of the upper, and the like. - Referring now to FIG. 4, unlike other prior art liners, the sole140 of the
liner 100 of the disclosed embodiment includes a semi-rigidlasting board 160 that is attached to alower edge 108 of thebottom portion 120 of the upper 101, preferably by stitching about the periphery of thelasting board 160. It will be appreciated that thelasting board 160 provides a secure and stable platform for the user's foot. A contoured sock liner orfootbed 170 as are known in the art, which may be removable from theliner 100, is also provided. Thefootbed 150 is sized to fit closely within the inner wall of the upper 101 near thelower edge 108, and provides a comfortable and padded fit for the bottom of the user's foot. - The sole140 also includes a
rugged outsole 142, which is affixed to the undersurface of thelasting board 160, and wraps about the lower edge of thebottom portion 120 of the upper 101. Theoutsole 142 may be made of any suitable outsole material, as is well known in the art. Theoutsole 142 provides a nonskid undersurface with good wear properties, such that user can walk about in theliner 100, at least briefly, without damaging theliner 100. It will also be appreciated that the sole 140 provides a dimensionally stable lower surface that conforms closely to theboot 90, providing the user with a reliably responsive interface with theboot 90, and eliminates the packing out problems associated with some prior art boot liners, as discussed above. In the currently preferred embodiment, theoutsole 142 is made from a second EVA foam material that is more rigid than the EVA foam used in thebottom portion 120 of the upper 101. - The liner construction disclosed herein permits the designer to include secondary cushioning elements normally associated with outer footwear. The secondary cushioning elements may be an air cell144 disposed generally within the
foam outsole 142. Other secondary cushioning elements include, for example, one or more sections of outsole utilizing a different EVA or other material having a lower durometer or hardness, or a gel insert. - While the preferred embodiment of the invention has been illustrated and described, it will be appreciated that various changes can be made therein without departing from the spirit and scope of the invention.
Claims (26)
1. A boot liner comprising:
an upper having a semi-rigid top portion that is shaped to wrap around part of a user's lower leg and a non-rigid bottom portion, the non-rigid bottom portion being shaped to cover the user's foot and malleoli, the bottom portion having a lower edge; and
a semi-rigid sole attached to the lower edge of the bottom portion of the upper.
2. The boot liner of claim 1 , wherein the top portion of the upper is attached to the bottom portion of the upper with stitches.
3. The boot liner of claim 1 , wherein the non-rigid bottom portion comprises a thermoformed ethylene vinyl acetate foam.
4. The boot liner of claim 3 , wherein the semi-rigid sole comprises a lasting board and an outsole fixedly attached to the lasting board.
5. The boot liner of claim 4 , wherein the outsole comprises a second ethylene vinyl acetate material that is more rigid than the ethylene vinyl acetate foam of the bottom portion of the upper.
6. The boot liner of claim 4 , wherein the semi-rigid top portion of the upper comprises a protective outer layer, a stiffener bonded to the protective outer layer, a cushioning layer, and an inner lining stitchedly attached to the protective outer layer.
7. The boot liner of claim 4 , wherein the lasting board is attached to the circumferential edge of the bottom portion of the upper with stitches.
8. The boot liner of claim 4 , wherein the outsole further comprises a secondary cushioning member disposed in a heel portion of the outsole.
9. The boot liner of claim 8 , wherein the secondary cushioning member is an air cell.
10. The boot liner of claim 3 , wherein the upper defines a vamp opening and further comprising a plurality of lace keepers attached to the semi-rigid top portion of the upper and a lace slidably disposed in the lace keepers.
11. A boot liner removably insertable into a snowboard boot, the boot liner comprising:
an upper having a flexible foot covering portion and a semi-rigid ankle support portion attached to an upper edge of the foot covering portion, the foot covering portion having a lower edge; and
a sole having a semi-rigid lasting board attached to the lower edge of the foot covering portion of the upper, and a nonskid outsole affixed to the lasting board and the foot covering portion of the upper.
12. The boot liner of claim 11 , wherein the semi-rigid ankle support portion of the upper is attached to the flexible foot-covering portion of the upper with stitches.
13. The boot liner of claim 11 , wherein the flexible foot-covering portion comprises a thermoformed ethylene vinyl acetate foam.
14. The boot liner of claim 13 , wherein the outsole comprises a second ethylene vinyl acetate material that is more rigid than the ethylene vinyl acetate foam of the bottom portion of the upper.
15. The boot liner of claim 13 , wherein the semi-rigid ankle support portion of the upper comprises a protective outer layer, a stiffener bonded to the protective outer layer, a cushioning layer and an inner lining stitchedly attached to the protective outer layer.
16. The boot liner of claim 13 , wherein the lasting board is attached to the circumferential edge of the bottom portion of the upper with stitches.
17. The boot liner of claim 11 , wherein the outsole further comprises a secondary cushioning member disposed in a heel portion of the outsole.
18. The boot liner of claim 17 , wherein the secondary cushioning member is an air cell.
19. The boot liner of claim 13 , wherein the upper defines a vamp opening, and further comprising a plurality of lace keepers attached to the semi-rigid top portion of the upper and a lace slidably disposed in the lace keepers.
20. A boot liner comprising:
a hybrid upper assembly comprising a non-rigid foot portion having a longitudinal slit, and a semi-rigid ankle support portion fixedly attached to the foot portion, the leg portion having a generally vertical slit, wherein the longitudinal slit and the vertical slit cooperatively define a vamp opening in the hybrid upper assembly, the hybrid upper assembly further comprising an elongate tongue that is fixedly attached to the non-rigid foot portion and extends through the length of the vamp opening; and
a semi-rigid sole attached to the upper assembly having a nonskid outsole.
21. The boot liner of claim 20 , wherein the non-rigid foot portion comprises a thermoformed ethylene vinyl acetate foam.
22. The boot liner of claim 21 , wherein the semi-rigid ankle support portion of the upper comprises a stitched construction having a protective outer layer, a semi-rigid stiffener, a cushioning layer, and an inner lining.
23. The boot liner of claim 21 , wherein the outsole comprises a second ethylene vinyl acetate material that is more rigid than the ethylene vinyl acetate foam of the bottom portion of the upper.
24. The boot liner of claim 21 , wherein the sole further comprises a lasting board that is fixedly attached to the non-rigid foot portion of the upper.
25. The boot liner of claim 24 , wherein the sole further comprises a secondary cushioning member disposed in a heel portion of the outsole.
26. The boot liner of claim 25 , wherein the secondary cushioning member is an air cell.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/458,744 US20040244221A1 (en) | 2003-06-09 | 2003-06-09 | Hybrid footwear liner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/458,744 US20040244221A1 (en) | 2003-06-09 | 2003-06-09 | Hybrid footwear liner |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040244221A1 true US20040244221A1 (en) | 2004-12-09 |
Family
ID=33490455
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/458,744 Abandoned US20040244221A1 (en) | 2003-06-09 | 2003-06-09 | Hybrid footwear liner |
Country Status (1)
Country | Link |
---|---|
US (1) | US20040244221A1 (en) |
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Owner name: K-2 CORPORATION, WASHINGTON Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HALL, WILLIAM B.;MARTIN, JOHN D.;DRAPER, ALEXANDER D.;REEL/FRAME:014411/0622;SIGNING DATES FROM 20030626 TO 20030707 |
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