WO2017062636A1 - Article chaussant régulant la température - Google Patents

Article chaussant régulant la température Download PDF

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Publication number
WO2017062636A1
WO2017062636A1 PCT/US2016/055776 US2016055776W WO2017062636A1 WO 2017062636 A1 WO2017062636 A1 WO 2017062636A1 US 2016055776 W US2016055776 W US 2016055776W WO 2017062636 A1 WO2017062636 A1 WO 2017062636A1
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WO
WIPO (PCT)
Prior art keywords
footwear product
footwear
pressure
thermo
cooling
Prior art date
Application number
PCT/US2016/055776
Other languages
English (en)
Inventor
David M. BRIENZA
Patricia KARG
David SMERESKY
Yi-ting TZEN
Original Assignee
University Of Pittsburgh-Of The Commonwealth System Of Higher Education
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by University Of Pittsburgh-Of The Commonwealth System Of Higher Education filed Critical University Of Pittsburgh-Of The Commonwealth System Of Higher Education
Priority to US15/766,618 priority Critical patent/US20180295930A1/en
Publication of WO2017062636A1 publication Critical patent/WO2017062636A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B7/00—Footwear with health or hygienic arrangements
    • A43B7/005—Footwear with health or hygienic arrangements with cooling arrangements
    • 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
    • A43B13/187—Resiliency achieved by the features of the material, e.g. foam, non liquid materials
    • A43B13/188—Differential cushioning regions
    • 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
    • A43B13/189—Resilient soles filled with a non-compressible fluid, e.g. gel, water
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B3/00—Footwear characterised by the shape or the use
    • A43B3/34—Footwear characterised by the shape or the use with electrical or electronic arrangements
    • 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
    • A43B7/1425—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 ball of the foot, i.e. the joint between the first metatarsal and first phalange
    • 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
    • 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

Definitions

  • the present disclosure generally relates to apparatus for regulating temperature with footwear and kits for retrofitting footwear for the same purpose.
  • DFU and subsequent LEA affects a person's health and function as well as quality of life, including reduction or loss of mobility, independence, inability to work, anxiety of possible development of new ulcers, depression and social isolation.
  • treating DFU is costly; diabetic foot ulcers were estimated to cost the Medicare system 1.5 billion dollars annually. These costs include treatment of non-infected and infected ulcers, ulcers that progress to
  • Diabetic foot ulcers are multifactorial conditions, and the major underlying causes are peripheral neuropathy and peripheral vascular ischemia.
  • Peripheral neuropathy causes foot deformities, lack of sensation, and dry skin that is susceptible to tearing.
  • Changes in microvascular function include impaired vasodilator response, decreased blood flow, and endothelial dysfunction leading to tissue ischemia of the lower extremities. These alterations lead to repetitive high pressure points at the bony prominences, occlusive arterial disease and eventually ischemia in the lower extremity.
  • Current insoles prescribed to patients at risk focus only on reducing the pressure concentrated at the bony prominences, however pressure is inevitable with daily activities (e.g., walking, standing). There is a need to develop therapeutic footwear insoles that will optimize tissue viability during ambulation and other daily activities.
  • Plantar pressure reduction insoles are currently prescribed to help prevent ulceration by reducing the adverse effect of peripheral ischemia.
  • no therapeutic footwear has been developed mainly for the purpose of enhancing tissue viability during repetitive ischemic events (e.g., walking, standing).
  • a diabetic insole as defined by Medicare, is a total contact, multiple density, removable inlay that is directly molded to the patient's foot or a model of the patient's foot using suitable materials with respect to the individual patient's needs.
  • These insoles must be delivered with an extra depth shoe that is defined as having the following properties; a full- length heel-to-toe filler which when removed provides a minimum of 3/16" additional depth for the insertion of custom-molded or customized insert, made from leather or equivalent material, a shoe closure, and is available in a multitude of sizes with a minimum of three widths.
  • a common technique for relieving areas of high pressure is to modify the insole by replacing the high- density material with less dense material, such as PoronTM, under the affected area of the foot.
  • PoronTM less dense material
  • Specialized insoles for prevention of diabetic foot ulcers are currently being developed with features to relieve excess pressure, warn the user of possible issues, and to measure micro-environmental conditions (e.g., moisture, temperature) of the feet.
  • One such insole is the Smart Insole, patented by Shoureshi and Albert, which focuses on the measurement of temperature, moisture, and pressure in order to warn the user of high risk conditions that can lead to ulceration.
  • FIG. 1 shows a traditional extra depth footwear design 10 comprising soft leather 12 padded with foam; an extended heel counter 13, a customized orthotic 14, spacer 15, firm rearfoot board 16, a hidden depth design 17 and a cushioning outsole 18.
  • Heating and electric stimulation has been used in diabetic foot care to increase blood flow in areas with injured tissue to promote tissue regeneration. Heating and electric stimulation is viable only for treating ulcers and only when the affected area is completely offloaded to allow unimpeded blood flow.
  • Our prior research has shown that cooling loaded tissue reduces metabolic rate and accumulation of cellular waste products, two factors known to lead to ulceration. This approach has been previously explored in footwear through the use of passive cooling packs, though not implemented in footwear products or clinical practice.
  • the target population of this development project is individuals with diabetic neuropathy who use orthotic footwear and are at risk for diabetic foot ulcers and subsequent amputation.
  • diabetes mellitus affects 25.8 million people, which is about 8.3% of the U.S. population. People with diabetes have a 25% lifetime risk of developing diabetic foot ulcers (DFU). Once an ulcer is formed, about 84% of the cases will proceed to lower extremity amputation (LEA).
  • LUA lower extremity amputation
  • Type 1 diabetes is a disorder that prevents the pancreas from properly producing insulin. Since insulin is responsible for glucose regulation in the body, people who develop this condition cannot regulate their glucose naturally and must use injected insulin to assist their bodies.
  • Type 2 diabetes is commonly a lifestyle disease that can be classified by the body's resistance to insulin or decreased production of insulin, therefore making regulation of the amount of glucose available in the body difficult.
  • Mayo Clinic Staff, 2014b This leads to both hypo and hyperglycemia, which are both dangerous acute conditions. However, as regulation of this disease gets better, the long-term effects are becoming more lucid.
  • DFU diabetic foot ulcer
  • DFUs are among the most common issue diabetics face, as they get older.
  • DFUs are the number 1 reason for nontraumatic amputation in the U.S. (Mroczek, 2008). While amputation is often the best course of action and a lifesaving technique, it is not a treatment option that is chosen lightly and has many issues that accompany it as well. As treatments for healing DFUs are constantly improving, the industry of preventing these wounds has remained stagnant and must be further developed and researched.
  • Ischemia is a common biological pathway that happens when tissue takes damage. Ischemia is often associated with moving extra lymphatic fluid towards the site of the tissue damage allowing for better management of the dead tissue. Often this reaction may cause extra damage or discomfort so a common treatment is the application of a cold compress directly to the affected area. Looking at this in a similar manner to a common inflammatory response allows for the assumption that cooling may help to prevent further damage from occurring.
  • Pressure is currently the main direct indicator for ulceration in DFUs. Pressure can lead to injury through continuous loading of tissue during gait and acute damage through instantaneous extremely high pressures. Due to trauma being a major contributor for causing ulceration, it is extremely important for clinicians to manage the pressure. In DFUs, this trauma can be caused due to continuous oscillation of pressure on the plantar surface of the foot at specific high pressure areas. Plantar pressure on the feet of diabetic neuropathy patients is much larger than the pressure normally required for the formation of other similar pressure related ulcers. Ulceration can be related to the amount of pressure over time that has been applied to a portion of the body.
  • the pressure at the metatarsal phalangeal joints of an ambulatory diabetic neuropathy patient is approximately 100 kilopascals while wearing pressure-relieving footwear and 1000 kilopascals while barefoot.
  • the barefoot pressure of diabetic patients is much higher than non-diabetic patients. This is due to a variety of reasons, although it has much to do with both the pathomechanics of the foot and the tissue changes that occur in diabetics.
  • the pathomechanics of the foot that change the pressure during gait and during stance include the loss of motion at the joints, loss of function of the intrinsic musculature, and extracellular matrix elasticity loss. (Fernando et al, 1991).
  • Placement and design of these insoles can be done through the use of either foam molds or scanning devices and software.
  • custom inserts are only one component of preventative methods.
  • the need for accommodative footwear that is properly sized and modified for the patient is paramount to preventing ulcers at locations away from the plantar surface of the foot. While extra depth footwear is commonly used in diabetic populations, which allows for extra room in the toe box, which prevents rubbing and pressure on the toes, patients with deformation that would make the use of these off the shelf footwear inappropriate require custom footwear fitted to their feet.
  • Another modification that can be done in order to prevent high pressures at the MTPs caused by decreased mobility of the joints of the foot are rocker bottom modifications.
  • One aspect of a preferred embodiment of the present disclosure comprises a footwear product with an integrated active temperature control system comprising: an upper; a sole comprising an insole comprising one or more thermo-conductive inserts or plugs; a midsole disposed between the insole and an outsole; wherein the midsole comprises one or more cooling elements selected from the group consisting of: an air flow cooling element, a liquid cooling element, a thermoelectric cooling element; and one or more heat sinks disposed in the midsole, outsole or between the midsole and outsole.
  • thermo- conductive inserts or plugs comprise one or more materials selected from the group consisting of a gel, an open-cell polyurethane foam, a closed-cell expanded rubber, a low friction interface material, and a polyethylene thermoplastic foam.
  • a separate one of the one or more cooling elements is disposed adjacent to or underneath each of the one or more the thermo-conductive inserts or plugs.
  • each of the one or more cooling elements comprises an active solid-state electrical device.
  • each of the one or more cooling elements comprises a thermo-electric cooling element having an active solid- state electrical device that operates on the Peltier effect.
  • a preferred footwear product of the present disclosure further comprises a power source for the one or more cooling elements.
  • the power source comprises rechargeable batteries that may be recharged when in use and/or when not in use.
  • a preferred footwear product of the present disclosure further comprises a control system or a closed loop passive control system to control the amount of heat being removed from the footwear product.
  • the one or more thermo-conductive inserts or plugs also provide cushioning to control pressure and/or shear and are each disposed in a portion of the insole contacting a high-pressure area or other area of the plantar surface of a foot disposed in the footwear product that normally experiences tissue breakdown, such as the first metatarsal or heel.
  • a preferred footwear product of the present disclosure further comprises a power source for the one or more heat sinks.
  • the one or more heat sinks are passive or body-powered.
  • each of the one or more heat sinks employs an air movement system that uses convection to move heat from each heat sink into the environment outside of the footwear product.
  • each of the one or more heat sinks employs the loading and/or unloading of the sole during gait to create airflow through or across each heat sink to move heat from each heat sink into the environment outside of the footwear product.
  • a preferred footwear product of the present disclosure further comprises temperature and/or pressure sensor(s) associated with each of the one or more thermo-conductive inserts or plugs.
  • a preferred footwear product of the present disclosure further comprises a control system or CPU to control the amount of heat being removed from the footwear product; wherein the control system or CPU has an input for setting the temperature to be maintained or to not be exceeded at each location of the one or more thermo-conductive inserts or plugs.
  • the input is disposed inside or outside of the footwear product and/or is operatively connected wirelessly or by wire to the control system.
  • the integrated active temperature control system is activated upon exceeding a preset pressure on one or more of the pressure sensors.
  • each of the one or more heat sinks comprises a metal component and/or a thermal-conductive foam component.
  • a single heat sink comprises one or more metal components and/or a thermal-conductive foam components and wherein the single heat sink directly contacts each of the one or more thermo-electric cooling elements.
  • kits for retrofitting a footwear product to include an integrated active temperature control system comprising one or more of the following items: a plug, having an upper surface comprising a low friction interface material and comprising a thermally conductive material, wherein the plug is for placement in an opening in an existing insole, a heat sink and cooling device for placement in the midsole and/or outer sole of the footwear product and a thermal paste or adhesive for connecting the thermal conductive material of the plug to the cooling device and/or heat sink.
  • the cooling device is selected from the group consisting of: an air flow cooling element, a liquid cooling element, a thermoelectric cooling element.
  • the plug comprises one or more materials selected from the group consisting of: a gel, an open-cell polyurethane foam, a closed-cell expanded rubber, a cushioning material and a polyethylene thermoplastic foam.
  • FIG. 1 shows a traditional extra depth footwear design
  • FIG. 2 is a cross-sectional view of a preferred embodiment of a footwear product with an integrated active temperature control system according to the present disclosure
  • FIG. 3 is a cross-sectional view with heat flow diagram of a preferred embodiment of a footwear product with an integrated active temperature control system according to the present disclosure.
  • FIG. 4 is a diagram of a control circuit for a preferred embodiment of a footwear product with an integrated active temperature control system according to the present disclosure.
  • a preferred embodiment of a temperature control therapeutic footwear (TCF) of the present disclosure comprises one or more coolers 35, heat sink 32, insole material 25 and, in various embodiments, a plug 40 and control circuit (as shown in FIG. 4).
  • cooler 35 will be a thermoelectric cooler which uses the Peltier effect in order to transform a voltage differential into a temperature differential. Thermoelectric coolers are relatively thin, light yet durable, are able to be controlled accurately, operate over the desired temperature range, and durability. Each thermoelectric cooler 35 is mated to a heat sink 32 to manage any bleed through of heat.
  • heat sink 32 will act to effect adequate removal of heat from the thermoelectric cooler 35, release of heat into the external environment, and be of minimal weight.
  • Heat sink 32 preferably will not affect the gait of the wearer and be durable.
  • heat sink 32 will be made of aluminum or other suitable metal or material.
  • the TCF 20 of the present disclosure preferably has an open air system into the sole 23 which comprises insole 25, midsole 26 and outsole 27 to allow for good airflow and convection to occur at the heat sink 32.
  • Thermoelectric cooler 35 will preferably be attached to heat sink 32 using thermo-conductive adhesive that is commonly used with CPUs and heat sinks in high end computers.
  • Plug material preferably is thermo-conductive while having a low durometer in order to accommodate the increased pressure under the high pressure areas, such as the MTPs or under deformities. Additionally, insole material should be machinable and easy to implant in order for practitioners or manufacturers to be able to custom place the devices for each wearer.
  • control circuit of the TCF 20 is programmable to allow for targeted temperature, as well as to provide energy conservation.
  • a preferred control circuit of the TCF 20 is easily calibrated in order to account for weight, resting body temperature, other disease
  • control circuit of TCF 20 also preferably is small and requires minimal energy to operate.
  • TCF 20 of the present disclosure is customizable for each individual wearer.
  • the TCF 20 is customizable via on site tools and may also comprise a heat sink incorporated into the outer sole 27 to effectively dissipate heat from TCF 20.
  • Plug 40 preferably comprises an upper surface 33 comprising a low friction interface material manufactured with polytetrafluoroethylene (PTFE) film, such as ShearBan ® , to protect the wearer's skin from damaging friction & shear trauma. Additionally, plug 40 comprises a cushioning pad 28 (preferably of a gel) and cooler 35 and heat sink 32 may also be incorporated into plug 40 in various preferred embodiments of TCF 20. Alternatively, heat sink 32 is disposed in or part of outer sole 27. TCF 20 moves the heat away from the foot towards outer sole 27 allowing for therapeutic temperature control at the high-pressure areas of the foot. The arrows in FIG. 3 show a preferred heat flow diagram accomplished by TCF 20.
  • PTFE polytetrafluoroethylene
  • thermo-conductive plug 40 preferably will consist of an easily machinable material, such as EVA, along with good heat conductors such as thermo-conductive gels. This will allow for the plug to be placed and fitted into a specific area of the foot, while keeping the conductive qualities that are needed.
  • the placement of the plug 40 will be conducted using the current method of excavating the higher durometer material from the bottom of the material and then adhering the new lower durometer material to fill the location. This method allows for a customizable cooling plug 40 that can be specifically placed by the practitioner without much difficulty.
  • adjustability of the heat sink 32 can allow for relatively easy customization.
  • TCF 20 preferably comprises diabetic footwear technology that prevents ischemic damage and subsequent diabetic foot ulcer development. Maintaining skin temperature at lower levels where high-pressure occludes blood flow minimizes ischemic damage. TCF 20 preferably maintains skin temperature at select locations of the foot at pre-activity levels during activity and after extended use.
  • thermo conductive gel pads 28 are preferably placed at the high-pressure areas, e.g., first metatarsal, and heel.
  • Cooling elements 35 such as phase change cooling (cooling packs), passive cooling (heat sink only), air flow cooling (fans, etc.), liquid cooling, Peltier (thermoelectric coolers), heat pipe systems or the like will be placed at the same locations as the gel pads 28 (and may preferably comprise part of plug 40) to maintain the temperature.
  • the thermoelectric cooling elements 35 are active solid-state electrical modules that operate on the Peltier effect, which is a phenomenon whereby the passage of an electrical current through a junction consisting of two dissimilar metals results in a cooling effect.
  • cooling elements 35 use rechargeable batteries as a power source whereby the user would recharge TCF 20 when not in use.
  • a closed loop passive control system will be used to control the amount of heat being removed from the plantar surface of the foot by TCF 20. This will act as a safety and energy conservation mechanism.
  • a heat sink 32 preferably will be used to move the heat away from the one or more thermoelectric coolers 35.
  • heat sinks 32 will either be a passive or a body -powered device.
  • heat sink 32 comprises a gait-powered air movement system that would use convection to move heat from the heat sink 32 into the environment outside of TCF 20. Such a heat sink 32 would use the loading and unloading of the footwear during gait to create airflow through the heat sink 32.
  • kits for retrofitting a footwear product such as a diabetic footwear product, to include an integrated active temperature control system
  • the kit comprises one or more of the following items: a soft material plug 40 having an upper surface 33 comprising a low friction interface material manufactured with polytetrafluoroethylene (PTFE) film and a thermal conductive core 28 that can be placed into an existing insole, a heat sink 32 and cooling device 35 that will preferably be placed inside the outer sole 27 of TCF 20 and will be connected to the thermal conductive material 28 via thermal paste or adhesive.
  • PTFE polytetrafluoroethylene

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

La présente invention concerne un article chaussant comportant un système intégré de régulation active de la température comprenant : une tige ; une semelle comprenant une semelle intérieure comprenant un ou plusieurs inserts ou bouchons thermo-conducteurs ; une semelle intermédiaire disposée entre la semelle intérieure et une semelle d'usure ; ladite semelle intermédiaire comprenant un ou plusieurs éléments de refroidissement choisis dans le groupe constitué par : un élément de refroidissement par écoulement d'air, un élément de refroidissement de liquide, un élément de refroidissement thermoélectrique ; et un ou plusieurs dissipateurs de chaleur disposés dans la semelle intermédiaire, la semelle d'usure ou entre la semelle intermédiaire et la semelle d'usure.
PCT/US2016/055776 2015-10-06 2016-10-06 Article chaussant régulant la température WO2017062636A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/766,618 US20180295930A1 (en) 2015-10-06 2016-10-06 Temperature regulating footwear

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201562238057P 2015-10-06 2015-10-06
US62/238,057 2015-10-06

Publications (1)

Publication Number Publication Date
WO2017062636A1 true WO2017062636A1 (fr) 2017-04-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11357282B2 (en) 2017-11-30 2022-06-14 Vivonics, Inc. System and method for measuring and controlling foot temperature

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD926451S1 (en) * 2019-08-10 2021-08-03 Albert Stevens Footwear midsole covering
US11712086B1 (en) * 2022-11-18 2023-08-01 Ascent Snorting Innovations, Inc. Temperature regulating insole

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Publication number Priority date Publication date Assignee Title
US20080271340A1 (en) * 2006-08-03 2008-11-06 Schering-Plough Healthcare Products, Inc. Gel Insole
WO2010085163A1 (fr) * 2009-01-26 2010-07-29 CTCP-Centro Tecnológico do Calçado de Portugal Procédé d'actionnement pour régulation active et autonome de la température à l'intérieur de la chaussure
US20130019503A1 (en) * 2011-05-20 2013-01-24 Brian James Vogt Method and apparatus for cooling footwear
WO2013054999A1 (fr) * 2011-10-13 2013-04-18 Yoo Sung Yeub Chaussure présentant une fonction de refroidissement et une fonction de chauffage
KR20150003535A (ko) * 2013-07-01 2015-01-09 배상원 냉방 깔창

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Publication number Priority date Publication date Assignee Title
US3071877A (en) * 1959-10-19 1963-01-08 Arthur R Stickles Inner sole having low frictional portions
US5154682A (en) * 1989-09-14 1992-10-13 David Kellerman Low friction adjustable shoe insert
EP2451304A4 (fr) * 2009-07-06 2014-01-08 Cedar Technologies Internat Ltd Semelle pour une chaussure

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080271340A1 (en) * 2006-08-03 2008-11-06 Schering-Plough Healthcare Products, Inc. Gel Insole
WO2010085163A1 (fr) * 2009-01-26 2010-07-29 CTCP-Centro Tecnológico do Calçado de Portugal Procédé d'actionnement pour régulation active et autonome de la température à l'intérieur de la chaussure
US20130019503A1 (en) * 2011-05-20 2013-01-24 Brian James Vogt Method and apparatus for cooling footwear
WO2013054999A1 (fr) * 2011-10-13 2013-04-18 Yoo Sung Yeub Chaussure présentant une fonction de refroidissement et une fonction de chauffage
KR20150003535A (ko) * 2013-07-01 2015-01-09 배상원 냉방 깔창

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11357282B2 (en) 2017-11-30 2022-06-14 Vivonics, Inc. System and method for measuring and controlling foot temperature

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