WO2021222435A1 - Masque facial médical chauffé - Google Patents

Masque facial médical chauffé Download PDF

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Publication number
WO2021222435A1
WO2021222435A1 PCT/US2021/029685 US2021029685W WO2021222435A1 WO 2021222435 A1 WO2021222435 A1 WO 2021222435A1 US 2021029685 W US2021029685 W US 2021029685W WO 2021222435 A1 WO2021222435 A1 WO 2021222435A1
Authority
WO
WIPO (PCT)
Prior art keywords
face mask
mask
medical face
temperature control
heating element
Prior art date
Application number
PCT/US2021/029685
Other languages
English (en)
Inventor
Mark Silverberg
Original Assignee
Mark Silverberg
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 Mark Silverberg filed Critical Mark Silverberg
Publication of WO2021222435A1 publication Critical patent/WO2021222435A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/002—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment
    • A41D13/005—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment with controlled temperature
    • A41D13/0051—Heated garments
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/002—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment
    • A41D13/005—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment with controlled temperature
    • A41D13/0053—Cooled garments
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/002—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment
    • A41D13/005—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment with controlled temperature
    • A41D13/0058—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment with controlled temperature having pockets for heated or cooled elements
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
    • A41D13/1107—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape
    • A41D13/1115—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape with a horizontal pleated pocket
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
    • A41D13/1107—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape
    • A41D13/1123—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape with a duckbill configuration
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
    • A41D13/1161—Means for fastening to the user's head

Definitions

  • the present invention relates to a medical face mask used to prevent and/or treat viral respiratory infections, including but not limited to infection by SARS-Cov-2 (COVID- 19) virus. While the COVID- 19 vims is a relatively recent occurrence, preliminary research indicates that the vims is susceptible to elevated temperatures in the range of 100°F and above. There is a ten-fold drop in SARS-CoV-1 viability in going from 33 degrees C (91.4 degrees F.) to 38 degrees C (100.4 degrees F). The SARS-CoV-1 vims is killed completely in 30 minutes at 75 degrees C. (167 degrees F.). The author believes that SARS-Cov-2 (COVID- 19) will respond the same.
  • the mask may function as a wearable vaccine.
  • Heated medical face masks are known in the art, and are disclosed in US Patent Nos. 4,601,287; 4,793,343; 5,551,154; and 8,960,190 among others.
  • conventional heated medical face masks have built-in or integral heating systems. Such masks are difficult, if not impossible to clean, and once soiled must be disposed of, adding to the already large volume of medical waste.
  • a heating element is releasably attached to or incorporated into the mask. Once the heating element is activated, by inhaling the warmed dry air generated by the heating element contained within the present face mask, it is envisioned that a decrease in the amount of inhaled viable vims can be achieved. It is envisioned that any vims particles that become trapped in the present mask will be deactivated due to exposure to high temperatures within the mask.
  • the user may use the present heated face mask for breathing warmer air as a means of staying warm outdoors.
  • a heating pack either disposable or battery powered and reusable, is secured within the mask, preferably within an internal pocket or fabric barrier to prevent the heating pack from contacting the wearer’s face.
  • the heating element is maintained in a spaced distance from the wearer’s nose and mouth.
  • the spacing particularly pertains to the heating element being powered by a higher voltage Li-ion battery (11. IV) with three levels of output. As the heated temperature can reach 200 degrees F., obviously the spacing from the wearer’s face is advisable.
  • the wearer is actually breathing in air that has a temperature averaged between the wearer’s exhale and the temperature of the heating pad. Temperatures in the 150 - 160 degrees F. range have been demonstrated to result in a 5 - 6-fold logarithmic drop-off in viable virus (a 7-fold logarithmic reduction is equal to sterilization).
  • the heating element (pack or pad or hand warmer) can be close to the skin.
  • a lower voltage Li-ion battery 7.4 volts 2600 mAh or 3400 mAh with four levels of output can be used for this purpose.
  • the same heating pad can be used for the higher and more comfortable lower temperatures by simply utilizing a more or less powerful Li-ion battery.
  • the mask design for the higher temperature heating needs to avoid contact between the heating element and the wearer’s skin.
  • the duckbill face mask is indicated.
  • An even lower voltage Li-ion Battery of 7.4V, and 2600 mAh or 3400 mAh may also be effective by varying the size of the battery powered heating elements as well as the “Bus Bar” distances using the conductive media FabRocTM.
  • the heating element is preferably contained in a pocket defined in the mask, so that the heating element is prevented from moving towards the wearer’s skin and also is replaceable when it expires, is removable and washable or able to be disinfected for reuse, or alternatively, to allow for laundering or disinfecting of the mask for re-use.
  • the present mask is thus optionally usable without the heating element.
  • the mask utilized is the duckbill face mask.
  • the heating pad is inside the mask and prevented from moving toward the wearer’s facial skin by built-in stops, or preferably with an internal pocket or fabric barrier for preventing the heating pack or element from contacting the wearer’s face.
  • the present mask is composed of at least two layers of textile; either woven or non-woven, having one of the layers composing the inner layer unattached to the other layers at the top edge of the mask, and as a result, forming a pouch or pocket.
  • Other textiles are also contemplated and included to compose the outer layer of the heated face mask such as the heat reflective material (Temptrol® material), and Gore-Tex® material.
  • These last two textiles preferably constitute a whole outer layer of the mask, or are optionally sewn in or otherwise attached as a patch occupying a generally central portion of the area of the mask.
  • 80% of a preferably central region of the mask is used for the pouch or pocket.
  • Another option of the present medical face mask includes a supplemental layer of textile material provided for wrapping around the heating element.
  • the present heated medical face mask is preferably washable or reusable, however disposable materials are also contemplated, and a modification of the typical disposable mask is envisioned to hold the heating element in a pouch composed of a separation of the inner layer of non-woven material from the outside layers along the top edge of the mask. If a battery-powered reusable heating element is to be used, another opening is needed on the wearer’s left side for the power cord. For the masks in which the heating element is to reach higher temperatures, the cable simply is positioned along the bottom of the inner surface of the mask and simply exists the mask along the bottom edge. The disposable heating element is removed prior to laundering, or upon expiration of the heating element at the end of its operational life.
  • an exterior periphery of the present mask is dimensioned so that the heating element occupies approximately that the size of the present medical face mask is dimensioned to be 10% or more larger than conventional masks in order to accommodate the heating element or cooling element and still have mask material to breathe through, while still offering protection to the surrounding community. Smaller percentages occupied by the heating element, as in approximately 25% - 60%, are envisioned and preferred to allow for the passage of air through the mask.
  • a battery powered heating pad with one or two 1 ⁇ 2” diameter openings in the heating pad is also envisioned. If a heating element is approximately 40% of the mask surface area, this would obviate any need to have the mask manufactured 10% larger.
  • the cooling elements are typically larger and may necessitate the increase in size of the mask. In some cases, smaller cooling elements are provided, leaving sufficient free space for air to pass through the mask for wearer respiration.
  • the mask can either be held in place upon the wearers face by loops of fabric to be placed around the ears, by ties attached to the top and bottom edge comers that are attachable behind the head and neck.
  • Elastic bands that are attached at the top and bottom edge comers or secured to the side edges of the mask as seen in N95 or KN95 respirators i.e. to each end to respective parts of the fabric are also contemplated that are positioned around the wearer’s head and neck.
  • the heating element is placed inside the pouch formed between the inner layer of textile and the layer just beneath this layer.
  • the heating element is chemical in nature, such as an air-activated warmer, which generates heat by the exothermic reaction of iron and air.
  • a conductive metal framework is provided within the pocket.
  • the heating element is contemplated as being battery-powered, and other ways to heat the inhaled air are envisioned.
  • Temperatures generated by the heating element will need to be sufficiently high (200 degrees F.), for warming the air being breathed in by the wearer, as in the mask functioning as a wearable vaccine or in the 120-130 degrees F. range as in the mask functioning for comfort only.
  • Conventional air-activated warmers generate temperatures in the range of 120-150° F for a duration of up to 12 hours or longer.
  • Battery-powered heating pads can be engineered to produce heat of more consistent duration. It is envisioned that other heating modalities, besides the ones mentioned be included.
  • the present face mask (more specifically pertaining to the higher temperature heating), was designed with the intention of protecting not only those individuals in close proximity to the wearer from the COVID-19 virus, (as conventional face masks do currently), but will additionally offer a degree of protection to the wearer as well. In protecting surrounding individuals, this mask will function as any other mask, although the degree of air passing through from the wearer to the environment may be more limited, but not too limited, and is a good quality. From an inhalation standpoint, the goal is to have air pass fairly easily through the mask, but in addition may also come through around the edges or through the mask where the heating element is not obstructing.
  • the present medical face mask is wearable without the heating element.
  • the heated face mask may also be of use to immunocompromised patients who would like to venture out, and by no means is its use limited to treatment of, or protection against COVID-19.
  • the present medical face mask is also contemplated as being effective against the general influenza.
  • An important feature of the present medical face mask is the ability to generate heat to the extent that the wearer thus inhales heated air, which raises the internal temperature of the wearer’s respiratory passages.
  • the present face mask performs the conventional function of preventing aerosols generated by the wearer in sneezing, coughing, talking and the like from escaping into the environment.
  • the present mask depending upon the power source, offers a degree of protection to the wearer in that the air intake will be heated, resulting in a decrease in the number of viable inhaled viral particles (currently SARS-Cov-2 (COVID-19).
  • the wearer By increasing the temperature of the wearer’s respiratory passages, the wearer is contemplated as being protected from suffering from a severe case of viral infection, and instead, either becomes asymptomatic or has only a mild case. As a result of this, a degree of immunity may still be conferred by the generation of IGA, IGM and IGG antibodies, as well as cellular and mucosal immunity.
  • the present heated face mask is contemplated for use in protecting the wearer from other infectious pathology such as the common cold and influenza, amongst other infectious agents spread through the air in the form of droplets or aerosol.
  • the present heating element is releasably retained in an interior of the face mask by horizontally placed and vertically separated, generally parallel ribs of cloth, cord or the like that retain the element in place via friction and obstruction.
  • the heating element is optionally provided with at least one throughbore for enhancing flow of ambient air through the element.
  • the heating pad is placed behind a fabric barrier, and is thus unable to migrate towards the wearer’s facial skin.
  • the heating pack is replaced with a cooling pack, for use in warmer outdoor temperatures for keeping the wearer more comfortable while outdoors, and may offer a “prevent fogging” to one’s eyeglasses or face shield.
  • a heated medical face mask including, a first outer layer having an outer surface and an inner surface; a second, inner layer having an outer surface and in inner surface; the first and second layers being fastened together around corresponding peripheral side and bottom edges but being open along an upper edge or side edge to form a pocket; and a heating element being releasably located in the pocket.
  • at least one fastening loop is secured to each peripheral side edge.
  • elastic straps, or fabric ties, having a pair of free ends are provided, each end being secured to a corresponding side edge of the joined first and second layers.
  • the heating element is one of air activated warmer, or a rechargeable battery powered heating element.
  • the heating element has an area dimensioned to be approximately at most 80% but preferably, a significantly lower % (as in approximately 25-60%) of the total mask surface area of the joined first and second layers.
  • FIG. 1 is a front view of the present medical face mask being worn
  • FIG. 2 is a rear view of the present medical face mask equipped with a heating element
  • FIG. 3 is a rear view of the present medical face mask of FIG. 2 shown cut away to reveal the heating element;
  • FIG. 4 is a schematic view of another embodiment of the present medical face mask equipped with a modified heating element;
  • FIG. 5 is a rear of the duckbill face mask used for higher temperature heating and demonstrating the heating element held in place by horizontally positioned and vertically spaced 1 ⁇ 4” yam or cord fastened to the inside of the mask with fabric glue. This prevents the high temperature heating element from moving toward the wearer’s face and skin.
  • FIG. 6 is a rear view of the disposable medical face mask of FIG. 6 (on the left) equipped with a re-usable cooling pack; and a fabric re-usable mask containing a re usable cooling pack on the right. The non-disposable cooling pack is in the center, below the two masks.
  • FIG. 7 is a rear view of another embodiment of the present medical face mask provided with a disposable heating element; (an air-activated warmer, or normal size hand warmer);
  • FIG. 8 is a front perspective view of another alternate embodiment of the present medical face mask, the duckbill face mask equipped with a battery powered heating element held in place by the parallel and vertically spaced, glued-on 1 ⁇ 4” yam cords; and
  • FIG. 9 is a rear perspective of a fabric mask with a supplemental layer sewn to the rear surface to accommodate a heating or cooling element
  • the present heated medical face mask is generally designated 10 having a first, outer layer 12 with an outer surface 14 and an inner surface 16.
  • a second, inner layer 18 has an outer surface 20 and in inner surface 22.
  • the outer and inner layers 12, 18 are made of any suitable textile, woven or non- woven, including but not limited to cotton, nylon, Temptrol® material, Gore-Tex® material, or other textiles known to those skilled in the art for manufacturing medical face masks.
  • the typical surgical face masks are made with non-woven fabric, created using a melt blowing process, which has better bacteria filtration and air permeability while remaining less slippery than woven cloth.
  • the material most commonly used to make them is polypropylene, either 20 or 25 grams per square meter (gsm) in density.
  • surgical masks are made up of several layers of non-woven plastic and can effectively filter very small particles, such as droplets of SARS-CoV-2.
  • the masks typically have an external waterproof layer 12 and an internal absorbent layer shown in the figures as 18.
  • first and second layers 12, 18 are fastened together around corresponding peripheral side edge 24 and bottom edges 26 but being open along an upper edge 28 to form a pocket 30.
  • An opening for the heating or cooling element may be on the side edge of the mask instead of the top edge.
  • a heating element is dimensioned to be releasably located in the pocket 30.
  • the heating element 32 is contemplated as being one of air-activated, or battery powered and/or rechargeable (the battery being rechargeable). Also the heating element 32 is preferably washable and able to be disinfected. As described below, cooling elements are also contemplated as the temperature control element 32.
  • At least one fastening loop 34 is secured to each peripheral side edge 24.
  • at least one elastic strap 36 is provided having a pair of free ends, each end being secured to a corresponding side edge of the joined first and second layers 12, 18.
  • An alternative to the loop 34, or elastic strap 36, is fabric or textile ties attached to or adjacent to the four comers of the face mask to tie over the head and behind the neck as in the commonly used surgical mask.
  • the heating element 32 has an area dimensioned to be approximately 80% at most, and more preferably lower, as in 25% -60% of an area of the joined first and second layers 12, 18 which each share the same area.
  • the pocket 30 is defined by a supplemental layer 38 optionally an extension of the second layer 18, of material dimensioned for at least partially wrapping around the heating element 32.
  • FIGs. 4 and 5 another embodiment of the present heated medical face mask is generally designated 40.
  • Components shared with the face mask 10 are designated with identical reference numbers.
  • One feature of the face mask 40 is that the inner layer 18 is provided with at least one and preferably a pair of vertically spaced, generally parallel retaining ribs 42 secured as by stitching, adhesives or the like.
  • the ribs 42 preferably made of cordage or dense, rolled cloth, are spaced to retain the temperature control element 32 in place via friction, or simply obstruction.
  • the ribs 42 are configured for holding the temperature control element 32 in place by engaging a respective upper and lower element edge 44, 46 while the wearer walks or performs other non-strenuous activities.
  • the ribs 42 secure the heating element 32 so that it is retained against the inner layer 18, and as such is somewhat distanced from the wearer’s nose and mouth. As a result of this, higher temperature can be utilized.
  • the ribs 42 are replaced by a sheet of fabric 43 secured, as by stitching or the like to the interior of the mask. On one side edge, an opening 45 is provided for insertion of a rolled or folded heating element and optional cord. Once in the space defined by the fabric 43, the heating element is positioned to be relatively flat and to expand into the space.
  • the fabric 43 functions to separate the heating element from the wearer’s face.
  • the heating element 32 is provided with at least one optional throughbore 48 for enhancing the flow of ambient air into the element to be heated before being inhaled by the wearer.
  • two 1 ⁇ 2” diameter throughbores 48 are placed 1 ⁇ 2 way between to the upper heating element edge 44 and the bottom heating element edge 46 and are separated by 1.5 to 2” along the length of the element 32. The throughbores 48 enhance air flow through the mask 40.
  • the heating element 32 is dimensioned to block less of the area of the mask, and having a dimension of 3.5 inches long along length “L” and 2 inches wide along width “W”.
  • the length “L” is 5 inches and the width “W” is 3 7/8 inches.
  • the length “L” is 3 1 ⁇ 2 inches and the width “W” is 2 inches.
  • the length “L” is 3 1 ⁇ 4 inches and the width “W” is 2 3 ⁇ 4 inches.
  • the disposable face mask 40 is 6 3 ⁇ 4” in length. From the top edge 28 to the bottom edge 26 it is 3 3/4”.
  • the mask 40 is pleated so that it can expand from top to bottom in order to wrap around one’s face, from the bridge of the nose to under the chin.
  • the expanded dimension is 5 1/2” from the top 28 to the bottom edge 26.
  • the batery powered heating element 32 preferably occupies sufficient enough area to provide heating, while not blocking a significant amount of air from flowing through the mask.
  • the heating element 32 currently being worked on has the following dimensions. As seen in FIG. 4, the heating element 32 is optionally powered by a batery
  • the batery 50 connected to the element via a conventional power cord 52. It is contemplated that the batery 50 is worn on the wearer’s person in a pocket or the like. Also, the batery 50 is contemplated as an 11.1 V, 2600mAh 3-Level Remote Controlled Li-ion batery, or a 7.4 V Li-ion batery, any of the above preferably with a key Fob®, depending on the temperatures needed by the wearer, as well as the purpose of the mask. It is envisioned that wearers using the mask 40 for keeping warmer outdoors in colder temperatures would prefer temperatures within the mask to be approximately 120- 130°F. Such temperatures are considered to be very comfortable against the skin. Relatively higher temperatures for use in colder environments are contemplated as being in the range of 180-200°F.
  • the later range would result in the inhaled air being the average of one’s exhale and one’s inhale (140 -150°F) and potentially act to logarithmically reduce the viable virus inhaled.
  • the power cord 52 exits a side 54 comes out the side of the element 32 and subsequently the side of the mask 40.
  • the power cord 52 optionally exits the botom edge 26 of the mask as an alternative.
  • the heating element 32 is wired with Bus Bars 55 which are imbedded wires designed for the electricity to flow through a FabRoc
  • TMconductive media and are separated by 2 inches.
  • the actual FabRocTM conductive media pad is 4” long by 2 and 5/16” wide.
  • Other sizes of the heating elements are contemplated and various distances between the Bus Bars are contemplated to result in the desired temperature profile.
  • the final temperature of the inhaled air is actually the average of one’s exhale (98.6° F.), and the temperature of the heating pad or air-activated warmer. It is envisioned to use either of these heating modalities in a non-disposable (reusable) face mask as well.
  • the heating element 32 is preferably covered in a washable and disinfectable material, in order for it to be cleaned and reused. There may not be need for perforations, to allow for additional airflow through the mask if, as seen in FIGs. 5 and 7, the heating element 32 occupies approximately 25-60% of the total open mask surface area, which refers to the mask laid upon a substrate and expanded so that folds or pleats are stretched out. It is contemplated that the amount of surface area of the face mask occupied by the heating element 32 varies from 25-60% of the total open mask surface area.
  • an air-activated warmer is used for heating the dimensions of the larger air-activated warmers are 5” long by 3 and 7/8” wide and can be too large to allow for the passage of air easily through the mask. It is contemplated that the size of the heating element can vary in order to result in the desired temperatures along with providing for enough unoccupied space to allow for airflow through the mask. As a result of this, additional sizes may be suitable using an appropriately matched power source i.e. battery. In this regard, either 7.4V, 2600 mAh or a 11. IV, 2600, mAh batteries are examples. As a result of this, a normal size air-activated warmer (hand warmer) 3.5” long by 2” wide would suffice and function best. Referring now to FIG.
  • the present mask 10 is shown with the temperature control element 32 being a non-disposable reusable cooling pack as mask 10a, and the mask 10b, which is a non-disposable washable fabric mask with the same non-disposable and reusable cooling pack shown hidden within the pocket 30.
  • the cooling pack 32 has dimension of 4.75 X 3.25 inches.
  • the temperature control element (cooling pack) 32 takes up approximately 80% of the surface area of the mask 10.
  • the present face mask 10 is shown with a reduced size temperature control element 32 located in the pocket 30.
  • an alternate embodiment of the present face mask is designated 60.
  • Components shared with the masks 10 and 40 are designated with identical reference numbers.
  • the main distinction of the face mask 60 is that it is of the “duckbill” type known in the art.
  • This mask 60 is not contemplated as being equipped with the pocket 30 for receiving the temperature control element 32 as described above. Instead, the heating element 32 is up against the inner surface of inside of the mask, held in place by horizontal parallel, and vertically spaced 1 ⁇ 4” wide fabric cords 42.
  • an alternative embodiment of the present face mask is designated 70.
  • Components shared with 10, 40, and 60 are designated with identical reference numbers.
  • the main distinction of face mask 70 is that it is not disposable and able to be laundered.
  • a supplemental double layer of polyester mesh 71 is sewn to the bottom and side edges of the inside of the mask and the top edge has an opening 30 for the placement of a heating or cooling element.
  • An additional small 1 ⁇ 4” opening 54 is present on the left side for passage of the power cord if this is the chosen heating modality.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Textile Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

L'invention concerne un masque facial médical chauffé, comprenant une première couche externe comportant une surface externe et une surface interne ; une seconde couche interne comportant une surface externe et une surface interne ; la première et la seconde couche étant fixées ensemble autour d'un bord latéral et d'un bord inférieur correspondants, mais étant ouvertes le long d'un bord supérieur ou d'un bord latéral pour former une poche ; et un élément chauffant étant situé amovible dans la poche.
PCT/US2021/029685 2020-04-29 2021-04-28 Masque facial médical chauffé WO2021222435A1 (fr)

Applications Claiming Priority (4)

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US202063017237P 2020-04-29 2020-04-29
US63/017,237 2020-04-29
US202063105700P 2020-10-26 2020-10-26
US63/105,700 2020-10-26

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US11577102B2 (en) * 2020-05-18 2023-02-14 Krithik Seela Universal personal protective mask

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US11617402B2 (en) * 2020-04-23 2023-04-04 Roy C. Mallady, JR. Protective face mask
WO2023277977A1 (fr) * 2021-06-29 2023-01-05 The Regents Of The University Of California Masque fonctionnel

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