US20110258882A1 - Removable walking attachment for ski boots - Google Patents
Removable walking attachment for ski boots Download PDFInfo
- Publication number
- US20110258882A1 US20110258882A1 US12/768,455 US76845510A US2011258882A1 US 20110258882 A1 US20110258882 A1 US 20110258882A1 US 76845510 A US76845510 A US 76845510A US 2011258882 A1 US2011258882 A1 US 2011258882A1
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- United States
- Prior art keywords
- toe
- heel
- pad
- ski boot
- support surface
- 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
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- 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
- A43B5/0415—Accessories
- A43B5/0417—Accessories for soles or associated with soles of ski boots; for ski bindings
- A43B5/0419—Accessories for soles or associated with soles of ski boots; for ski bindings for walking aids
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B3/00—Footwear characterised by the shape or the use
- A43B3/16—Overshoes
-
- 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
- A43B5/0415—Accessories
- A43B5/0417—Accessories for soles or associated with soles of ski boots; for ski bindings
- A43B5/0421—Accessories for soles or associated with soles of ski boots; for ski bindings located underneath the sole
Definitions
- the present invention relates to a removable walking attachment for ski boots for improving traction and mobility comfort.
- Ski boots are constructed to have a rigid (inflexible) outer (bottom) sole. That makes walking on the boots difficult and dangerous, as the wearer must walk flat-footed, i.e., a so-called duck-walk. Ski boot wearers tend to walk with their legs splayed outwardly in order to gain more stability. Removable attachments for ski boots have been proposed for the purpose of facilitating walking in the boots and/or improving traction. However, room for improvement remains.
- a removable walking attachment for a ski boot comprises a one-piece body formed of an elastomeric material and defining a toe pad, a heel pad disposed rearwardly of the toe pad, and a flexible connector interconnecting the toe pad and the heel pad for permitting relative movement therebetween.
- the toe pad includes a toe base and an upright wall, the wall forming a rearwardly open cavity configured to receive a toe portion of a ski boot and including a rearwardly projecting lip disposed at an upper end of the cavity and adapted to overlie and engage a lower front rim of a ski boot when the attachment is worn.
- the toe base includes a toe underside and an upwardly facing toe support surface, wherein the toe underside, when lying flat on a planar surface, defines a plane.
- the heel pad includes a heel base and an upright wall, the wall of the heel base forming a forwardly open cavity configured to receive a heel portion of a ski boot and including a forwardly projecting lip disposed at an upper end of the forwardly open cavity and adapted to overlie and engage a lower rear rim of a ski boot when the attachment is worn.
- the heel base includes a heel underside and an upwardly facing heel support surface, wherein the heel underside, when lying flat on a planar surface, lies in said plane.
- the respective configurations of the toe and heel support surfaces are such as to cause the underside of the toe pad to become inclined forwardly/upwardly relative to said plane, and the heel pad to be inclined rearwardly/upwardly relative to said plane, when the attachment is worn on a ski boot.
- FIG. 1 is a top perspective view of two removable walking attachments for a pair of ski boots.
- FIG. 2 is a bottom perspective view of the removable attachments shown in FIG. 1 .
- FIG. 3 is a side elevational view of a ski boot to which one of the removable attachments has been attached.
- FIG. 4 is a longitudinal sectional view taken through one of the removable attachments.
- FIGS. 5 a - 5 c are perspective views of a ski boot showing a sequence of steps for applying one of the removable attachments to a ski boot.
- FIG. 6 is a bottom rear perspective view of the ski boot of FIG. 3 .
- FIG. 7 is a bottom side perspective view of the ski boot of FIG. 3 .
- FIG. 10 Depicted in the figures is an improved removable walking attachment for ski boots which provides a more natural walking motion and greater traction in ice and snow.
- a pair of the attachments 10 , 10 A would be available in various sizes to fit different sizes of ski boots.
- That attachment 10 comprises a one-piece body formed of an elastomeric material such as natural rubber or thermoplastic urethane rubber (TPU rubber) for example.
- TPU rubber thermoplastic urethane rubber
- one-piece is meant that the below-described toe pad, heel pad and connector of the body are formed simultaneously of the same material, e.g., by molding, in contrast to being formed of separate pieces that are then bonded to one another.
- Optional toe and heel wear pieces 14 , 16 can be bonded to the body as will be later explained.
- the one-piece body includes a toe pad 18 , a heel pad 20 , and a connector 22 interconnecting a rear side of the toe pad to the front side of the heel pad.
- the horizontal width of the connector preferably narrows at its midpoint to a width W which is shorter than the width of each of the toe and heel pads ( FIG. 1 ).
- a vertical thickness T of the connector 22 is less than the thickness of each of the toe and heel pads (see FIG. 4 ).
- An underside of the connector is disposed vertically higher than the undersides of the toe and heel pads (see FIG. 4 ).
- the toe pad 18 includes a toe base 24 and an upright wall structure 26 .
- the toe base 24 includes an underside having a suitable traction pattern thereon, such as spaced apart projections 25 (see FIG. 2 ). Lower tips of the projections 25 define a plane 29 when the attachment is not worn and lays flat on a surface (see FIG. 4 ).
- the wall structure includes a front portion 28 disposed at a front side of the toe base and two side portions 30 , 30 extending along at least a portion of respective lateral sides of the toe base.
- the wall structure is shown as solid, but it could instead be somewhat skeletal.
- the toe wall structure 26 forms a toe cavity which is open in a rearward direction and configured to receive a toe portion of a ski boot SB.
- An upper edge of the front portion 28 includes a rearwardly extending lip 34 adapted to overlie and engage the standard lower front rim R of a ski boot to secure the toe pad to the ski boot (see FIG. 5 a ).
- the toe base 24 includes an upwardly facing toe support surface 35 adapted to support the toe portion of a ski boot.
- the toe support surface 35 includes front portion 36 and a rear portion 38 .
- the front portion 36 is in the form of a surface which defines a floor of the toe cavity.
- the vertical thickness of the toe base is not uniform in the fore-aft direction thereof. Rather, the thickness is greater adjacent the rear portion 38 of the toe support surface 35 than adjacent the front portion 36 thereof and progressively decreases from the rear to the front.
- the vertical distance D from the plane 29 to the rear portion 38 of the toe support surface is greater than a distance d from the plane 29 to the front portion 36 of the toe support surface.
- an intermediate portion 39 of the toe support surface 35 extending between the front and rear portions 36 , 38 is inclined forwardly/downwardly.
- that inclined portion preferably includes closed-bottom recesses 37 forming a rib pattern for the purpose of reducing the weight of the attachment.
- the inclined portion could be solid and/or the front portion 36 could be ribbed.
- the vertical distance between the front portion 36 of the toe support surface to the underside of the lip 34 corresponds substantially to the standard vertical thickness of the lower front rim R of a ski boot (see FIG. 5 a ).
- the above-described relationship of the heights D and d results in the front end of the toe pad being raised up when the attachment is placed on a ski boot, whereby the underside of the toe pad becomes inclined upwardly/forwardly relative to the plane 29 .
- the heel pad 20 includes a heel base 54 and an upright wall structure 56 .
- the heel base 54 includes an underside having a suitable traction pattern thereon, such as spaced apart projections 55 ( FIG. 2 ). Lower tips of the projections lie in the plane 29 when the attachment lays flat on a surface.
- the wall structure 56 includes a rear portion 58 disposed at a rear side of the heel base and two side portions 60 , 60 extending along at least a portion of respective lateral sides of the heel base.
- the wall structure 56 is shown as solid, but it could instead be somewhat skeletal.
- the wall structure 26 forms a heel cavity which is open in a forward direction and configured to receive a heel portion of a ski boot.
- An upper edge of the rear portion 58 includes a forwardly extending lip 64 adapted to overlie and engage the standard lower rear rim R′ of a ski boot to secure the heel pad thereto ( FIG. 5 ).
- the heel base 54 includes an upwardly facing heel support surface 65 adapted to support the heel portion of a ski boot.
- the heel base 54 includes a rear portion 66 and a front portion 68 .
- the rear portion 66 is in the form of a surface which defines a floor of the heel cavity.
- the vertical thickness of the heel base is not uniform in the fore-aft direction thereof. Rather, the thickness is greater adjacent the front portion of the heel support surface than adjacent the rear portion thereof and progressively decreases from the front to the rear.
- the vertical distance D′ from the plane 29 to the front portion 68 of the heel support surface 65 is greater than a distance d′ from the plane 29 to the rear portion 66 of the heel support surface 65 .
- an intermediate portion 69 of the toe support surface 65 disposed between the front and rear portions 66 , 68 is inclined rearwardly/downwardly.
- that inclined portion 69 includes closed-bottom recesses 67 forming a rib pattern for the purpose of reducing weight.
- the inclined portion could be solid, and/or the rear portion 66 could be ribbed.
- the vertical distance between the rear portion 66 of the heel support surface to the underside of the lip 64 corresponds substantially to the standard vertical thickness T′ of the lower rear rim R′ of a ski boot ( FIG. 5 a ).
- T′ the standard vertical thickness of the lower rear rim R′ of a ski boot
- the above-described relationship of the heights D′ and d′ results in the rear end of the heel pad 20 being raised up when the attachment is worn on a ski boot, whereby the underside of the heel pad becomes inclined upwardly/rearwardly relative to the plane 29 .
- the boot wearer inserts the lower front rib R of the boot into the toe cavity such that the rim R underlies the front lip 34 , as shown in FIG. 5 a .
- the wearer grasps a tab 100 projecting from an upper edge of the rear wall portion 58 and pulls the heel pad 20 rearwardly and upwardly to stretch the attachment and insert the heel of the ski boot into the heel cavity until the lower rear rim R′ of the ski boot underlies the forwardly projecting lip 64 (see FIG. 5 b ). The wearer then releases the tab 100 , causing the attachment to elastically snap back and become tightly secured to the ski boot.
- the flat underside of the boot comes to rest on the rear portion 38 of the toe pad and the front portion 68 of the heel pad. Due to the difference between the distances D and d, and between the distances D′ and d′, the front end of the toe pad 18 and the rear end of the heel pad 20 are caused to be flexed upwardly. That results in the underside of the toe pad becoming inclined forwardly/upwardly at a slight angle A, e.g., of about 10 degrees, relative to the plane 29 and the heel pad becoming inclined rearwardly/upwardly at a slight angle B, e.g., of about 10 degrees, relative to the plane 29 (see FIG. 3 ).
- A e.g., of about 10 degrees
- a slight angle B e.g., of about 10 degrees
- Such inclining of the toe and heel pads is permitted by the fact that, when the attachment is not being worn, the intermediate portion of the toe support surface 35 is inclined forwardly/downwardly from the rear end 38 thereof, and the intermediate portion of the heel support surface 65 is inclined rearwardly/downwardly from the front end 68 thereof.
- the gap between the underside of the toe pad and the underside of the heel pad, i.e., the region beneath the connector 22 , is situated beneath the wearer's arch and thus permits this natural motion to occur. That is in contrast to previously proposed ski boot attachments in which the entire bottom surface of the attachment is convexly curved from front to back, such that the thickest part of the underside lies beneath the wearer's arch, causing an unnatural up/down movement as the wearer walks.
- the respective vertical thicknesses of the toe pad 18 and the heel pad 20 should be large enough to enable the undersides of the toe and heel pads to be inclined sufficiently to achieve the more natural walking motion. If the pads 18 , 20 are too thin, their undersides cannot be so inclined without making the pads too fragile and susceptible to abrasive wear.
- the thickest part of each of the toe and heel pads i.e., at the rear portion 38 of the toe pad and the front portion 68 of the heel pad, should be at least 1 ⁇ 2 inch, more preferably at least 3 ⁇ 4 inches.
- the difference between the distances D and d, and between the distances D′ and d′ should be at least 3 ⁇ 8 inch, more preferably at least 5 ⁇ 8 inches; that is also true of the difference between the distances D′ and d′.
- Each wear piece 14 , 16 extends laterally across the respective pad 18 or 20 and is formed of a stiff material, e.g., of plastic such as urethane and includes projections 14 a , 16 a whose bottom tips lie in the plane 29 when the attachment is not worn and lays flat against a surface.
Abstract
Description
- The present invention relates to a removable walking attachment for ski boots for improving traction and mobility comfort.
- Ski boots are constructed to have a rigid (inflexible) outer (bottom) sole. That makes walking on the boots difficult and dangerous, as the wearer must walk flat-footed, i.e., a so-called duck-walk. Ski boot wearers tend to walk with their legs splayed outwardly in order to gain more stability. Removable attachments for ski boots have been proposed for the purpose of facilitating walking in the boots and/or improving traction. However, room for improvement remains.
- A removable walking attachment for a ski boot comprises a one-piece body formed of an elastomeric material and defining a toe pad, a heel pad disposed rearwardly of the toe pad, and a flexible connector interconnecting the toe pad and the heel pad for permitting relative movement therebetween. The toe pad includes a toe base and an upright wall, the wall forming a rearwardly open cavity configured to receive a toe portion of a ski boot and including a rearwardly projecting lip disposed at an upper end of the cavity and adapted to overlie and engage a lower front rim of a ski boot when the attachment is worn. The toe base includes a toe underside and an upwardly facing toe support surface, wherein the toe underside, when lying flat on a planar surface, defines a plane. The heel pad includes a heel base and an upright wall, the wall of the heel base forming a forwardly open cavity configured to receive a heel portion of a ski boot and including a forwardly projecting lip disposed at an upper end of the forwardly open cavity and adapted to overlie and engage a lower rear rim of a ski boot when the attachment is worn. The heel base includes a heel underside and an upwardly facing heel support surface, wherein the heel underside, when lying flat on a planar surface, lies in said plane. The respective configurations of the toe and heel support surfaces are such as to cause the underside of the toe pad to become inclined forwardly/upwardly relative to said plane, and the heel pad to be inclined rearwardly/upwardly relative to said plane, when the attachment is worn on a ski boot.
-
FIG. 1 is a top perspective view of two removable walking attachments for a pair of ski boots. -
FIG. 2 is a bottom perspective view of the removable attachments shown inFIG. 1 . -
FIG. 3 is a side elevational view of a ski boot to which one of the removable attachments has been attached. -
FIG. 4 is a longitudinal sectional view taken through one of the removable attachments. -
FIGS. 5 a-5 c are perspective views of a ski boot showing a sequence of steps for applying one of the removable attachments to a ski boot. -
FIG. 6 is a bottom rear perspective view of the ski boot ofFIG. 3 . -
FIG. 7 is a bottom side perspective view of the ski boot ofFIG. 3 . - Depicted in the figures is an improved removable walking attachment for ski boots which provides a more natural walking motion and greater traction in ice and snow. A pair of the
attachments - The
attachments attachment 10 will be described in detail herein. Thatattachment 10 comprises a one-piece body formed of an elastomeric material such as natural rubber or thermoplastic urethane rubber (TPU rubber) for example. By “one-piece” is meant that the below-described toe pad, heel pad and connector of the body are formed simultaneously of the same material, e.g., by molding, in contrast to being formed of separate pieces that are then bonded to one another. Optional toe andheel wear pieces - The one-piece body includes a
toe pad 18, aheel pad 20, and aconnector 22 interconnecting a rear side of the toe pad to the front side of the heel pad. The horizontal width of the connector preferably narrows at its midpoint to a width W which is shorter than the width of each of the toe and heel pads (FIG. 1 ). Also, a vertical thickness T of theconnector 22 is less than the thickness of each of the toe and heel pads (seeFIG. 4 ). An underside of the connector is disposed vertically higher than the undersides of the toe and heel pads (seeFIG. 4 ). - The
toe pad 18 includes atoe base 24 and anupright wall structure 26. Thetoe base 24 includes an underside having a suitable traction pattern thereon, such as spaced apart projections 25 (seeFIG. 2 ). Lower tips of theprojections 25 define aplane 29 when the attachment is not worn and lays flat on a surface (seeFIG. 4 ). The wall structure includes afront portion 28 disposed at a front side of the toe base and twoside portions - The wall structure is shown as solid, but it could instead be somewhat skeletal. The
toe wall structure 26 forms a toe cavity which is open in a rearward direction and configured to receive a toe portion of a ski boot SB. An upper edge of thefront portion 28 includes a rearwardly extendinglip 34 adapted to overlie and engage the standard lower front rim R of a ski boot to secure the toe pad to the ski boot (seeFIG. 5 a). - The
toe base 24 includes an upwardly facingtoe support surface 35 adapted to support the toe portion of a ski boot. Thetoe support surface 35 includesfront portion 36 and arear portion 38. Thefront portion 36 is in the form of a surface which defines a floor of the toe cavity. The vertical thickness of the toe base is not uniform in the fore-aft direction thereof. Rather, the thickness is greater adjacent therear portion 38 of thetoe support surface 35 than adjacent thefront portion 36 thereof and progressively decreases from the rear to the front. Thus, when the attachment is not being worn and is seated flat against a planar surface, as shown inFIG. 4 , the vertical distance D from theplane 29 to therear portion 38 of the toe support surface is greater than a distance d from theplane 29 to thefront portion 36 of the toe support surface. Preferably, an intermediate portion 39 of thetoe support surface 35 extending between the front andrear portions bottom recesses 37 forming a rib pattern for the purpose of reducing the weight of the attachment. Alternatively, the inclined portion could be solid and/or thefront portion 36 could be ribbed. - The vertical distance between the
front portion 36 of the toe support surface to the underside of thelip 34 corresponds substantially to the standard vertical thickness of the lower front rim R of a ski boot (seeFIG. 5 a). As will be explained later, the above-described relationship of the heights D and d results in the front end of the toe pad being raised up when the attachment is placed on a ski boot, whereby the underside of the toe pad becomes inclined upwardly/forwardly relative to theplane 29. - The
heel pad 20 includes aheel base 54 and anupright wall structure 56. Theheel base 54 includes an underside having a suitable traction pattern thereon, such as spaced apart projections 55 (FIG. 2 ). Lower tips of the projections lie in theplane 29 when the attachment lays flat on a surface. Thewall structure 56 includes arear portion 58 disposed at a rear side of the heel base and twoside portions wall structure 56 is shown as solid, but it could instead be somewhat skeletal. Thewall structure 26 forms a heel cavity which is open in a forward direction and configured to receive a heel portion of a ski boot. An upper edge of therear portion 58 includes a forwardly extendinglip 64 adapted to overlie and engage the standard lower rear rim R′ of a ski boot to secure the heel pad thereto (FIG. 5 ). - The
heel base 54 includes an upwardly facingheel support surface 65 adapted to support the heel portion of a ski boot. Theheel base 54 includes arear portion 66 and afront portion 68. Therear portion 66 is in the form of a surface which defines a floor of the heel cavity. The vertical thickness of the heel base is not uniform in the fore-aft direction thereof. Rather, the thickness is greater adjacent the front portion of the heel support surface than adjacent the rear portion thereof and progressively decreases from the front to the rear. Thus, when the attachment is not being worn and is seated flat against a planar surface, as shown inFIG. 4 , the vertical distance D′ from theplane 29 to thefront portion 68 of theheel support surface 65 is greater than a distance d′ from theplane 29 to therear portion 66 of theheel support surface 65. Preferably, an intermediate portion 69 of thetoe support surface 65 disposed between the front andrear portions rear portion 66 could be ribbed. - The vertical distance between the
rear portion 66 of the heel support surface to the underside of thelip 64 corresponds substantially to the standard vertical thickness T′ of the lower rear rim R′ of a ski boot (FIG. 5 a). As will be explained later, the above-described relationship of the heights D′ and d′ results in the rear end of theheel pad 20 being raised up when the attachment is worn on a ski boot, whereby the underside of the heel pad becomes inclined upwardly/rearwardly relative to theplane 29. In order to mount theattachment front lip 34, as shown inFIG. 5 a. Then, the wearer grasps atab 100 projecting from an upper edge of therear wall portion 58 and pulls theheel pad 20 rearwardly and upwardly to stretch the attachment and insert the heel of the ski boot into the heel cavity until the lower rear rim R′ of the ski boot underlies the forwardly projecting lip 64 (seeFIG. 5 b). The wearer then releases thetab 100, causing the attachment to elastically snap back and become tightly secured to the ski boot. - When the wearer then stands on a surface, the flat underside of the boot comes to rest on the
rear portion 38 of the toe pad and thefront portion 68 of the heel pad. Due to the difference between the distances D and d, and between the distances D′ and d′, the front end of thetoe pad 18 and the rear end of theheel pad 20 are caused to be flexed upwardly. That results in the underside of the toe pad becoming inclined forwardly/upwardly at a slight angle A, e.g., of about 10 degrees, relative to theplane 29 and the heel pad becoming inclined rearwardly/upwardly at a slight angle B, e.g., of about 10 degrees, relative to the plane 29 (seeFIG. 3 ). Such inclining of the toe and heel pads is permitted by the fact that, when the attachment is not being worn, the intermediate portion of thetoe support surface 35 is inclined forwardly/downwardly from therear end 38 thereof, and the intermediate portion of theheel support surface 65 is inclined rearwardly/downwardly from thefront end 68 thereof. - As the skier walks while wearing the attachments, a more natural walking motion is possible, due to the inclinations of the undersides of the toe and heel pads. That is, as one foot of the wearer pushes off a surface along the
toe pad 18, a more natural rolling motion is achieved by the forwardly/upwardly inclined underside of that toe pad. Likewise, as the wearer lands on theheel pad 20 of the other foot, a more natural rolling motion is achieved due to the forward/downward inclination of the underside of theheel pad 20. - The gap between the underside of the toe pad and the underside of the heel pad, i.e., the region beneath the
connector 22, is situated beneath the wearer's arch and thus permits this natural motion to occur. That is in contrast to previously proposed ski boot attachments in which the entire bottom surface of the attachment is convexly curved from front to back, such that the thickest part of the underside lies beneath the wearer's arch, causing an unnatural up/down movement as the wearer walks. - The respective vertical thicknesses of the
toe pad 18 and theheel pad 20 should be large enough to enable the undersides of the toe and heel pads to be inclined sufficiently to achieve the more natural walking motion. If thepads rear portion 38 of the toe pad and thefront portion 68 of the heel pad, should be at least ½ inch, more preferably at least ¾ inches. The difference between the distances D and d, and between the distances D′ and d′ should be at least ⅜ inch, more preferably at least ⅝ inches; that is also true of the difference between the distances D′ and d′. - Since abrasive wear of the toe and heel pads is most prevalent at the front lower edge of the toe pad and the lower rear edge of the heel pad, it is preferable to embed the
wear pieces wear piece respective pad plane 29 when the attachment is not worn and lays flat against a surface. - It will be appreciated that the embodiment described above is only a preferred embodiment, and that additions, deletions, modifications, and substitutions not specifically described may be made without departing from the spirit and scope of the appended claims.
Claims (16)
Priority Applications (1)
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US12/768,455 US20110258882A1 (en) | 2010-04-27 | 2010-04-27 | Removable walking attachment for ski boots |
Applications Claiming Priority (1)
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US12/768,455 US20110258882A1 (en) | 2010-04-27 | 2010-04-27 | Removable walking attachment for ski boots |
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US20110258882A1 true US20110258882A1 (en) | 2011-10-27 |
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US12/768,455 Abandoned US20110258882A1 (en) | 2010-04-27 | 2010-04-27 | Removable walking attachment for ski boots |
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Cited By (7)
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US20150313317A1 (en) * | 2014-05-02 | 2015-11-05 | Christopher C. Wike | Device and method for training or learning how to march in a group |
US20150317912A1 (en) * | 2014-05-02 | 2015-11-05 | Christopher C. Wike | Footwear for training or learning how to march in a group |
US9775398B1 (en) * | 2014-05-28 | 2017-10-03 | Jimmy Hinh Chang | Device which fits over a shoe and method of use |
US20180255867A1 (en) * | 2017-03-07 | 2018-09-13 | Lorri Cornett | Cycling Shoe Cover |
CN108882987A (en) * | 2016-03-15 | 2018-11-23 | 金忠焕 | Leg protector and sole for it |
DE102017116922A1 (en) | 2017-07-26 | 2019-01-31 | Marcus Maaßen | Walking aid for shoes, shoe system with a shoe and a walker and system of a walker and a stick |
US10856610B2 (en) | 2016-01-15 | 2020-12-08 | Hoe-Phuan Ng | Manual and dynamic shoe comfortness adjustment methods |
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