High filtration reusable mask with textured contact portions and various coupling mechanisms

Abstract

A reusable mask is provided comprising a one-piece mask body configured to cover the nose and mouth of a human face and comprising at least one filter attachment port wherein the at least one filter attachment port comprises a coupling mechanism defining an opening in the mask body, the mask body extends from the outer surface of the mask body; the coupling mechanism includes a proximal portion proximate the outer surface of the mask body and a plurality of protrusions extending away from the outer surface of the mask body from the proximal portion, the coupling mechanism of the at least one filter attachment port being configured to connect with a replaceable filter. The reusable mask may include a textured edge facing the user that is configured to contact the user's face when the user wears properly.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. Provisional Application No. 63 / 319,072 (filing date March 11, 2022), the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present invention relates to reusable masks, and more particularly, to reusable masks with replaceable filters. Background Art

[0004] Traditional high-filtration masks (such as N95 masks) include disposable masks and reusable respirators with replaceable filters. When the user wears it properly, the high-filtration mask filters out most particles in the air, including infectious particles (such as viruses). Such masks are commonly used in industry (such as mining, construction, painting) and healthcare. People also commonly use high-filtration masks in public places to prevent airborne diseases. Summary of the invention

[0005] Conventional high filtration masks are often uncomfortable to wear for long periods of time, particularly due to limited breathability and reduced airflow compared to the absence of a mask. Specifically, reusable masks made of polymeric materials may have a sticky feel, which may be uncomfortable for the user. Moreover, such reusable high filtration masks may include one or more removable, replaceable filters. However, the coupling mechanisms used in conventional high filtration masks may provide less sealing and / or be relatively difficult to disengage.

[0006] Thus, the present invention provides a high filtration reusable mask having a polymer body member having a contact portion (i.e., the body portion that is in direct contact with the user's face) that is less sticky than the contact portion of a conventional reusable mask made of a polymer material. The present invention also provides various snap-fit ​​accessories that can be included in the high filtration mask described herein to ensure an adequate seal, but can also be easily disengaged so that a used filter can be easily removed and replaced with a new filter.

[0007] In some embodiments, a high-filtration reusable mask may include a mask body including one or more filter attachment ports, and a replaceable filter is configured to be removably attached to the filter attachment port. One or more filter attachment ports extend from the outer surface of the mask body and each include a filter support structure. One or more filter attachment ports are configured to receive one or more replaceable filters (e.g., each filter attachment port receives a replaceable filter), so that the filter support structure of the filter attachment port separates the two filter media of the replaceable filter and enables the replaceable filter to take an extended configuration. By separating the two filter media of the replaceable filter, the replaceable filter can allow more air to enter and leave the filter by inhalation and exhalation, respectively.

[0008] The one or more attachment ports may include any of the various couplings or accessories described herein. For example, the attachment port may include a resilient plug snap (with respect to Figure 3A -3C details), cantilever snap-on insert with filler (about Figure 4A and 4B Details), cantilever snap-on inserts without filler (for Figure 5A and 5B Detailed description), or twist and lock coupling mechanism (for Fig. 7A and 7B for detailed instructions).

[0009] In some embodiments, a reusable mask is provided, comprising: a one-piece mask body, the one-piece mask body being configured to cover the nose and mouth of a human face, and comprising at least one filter attachment port, wherein the at least one filter attachment port comprises a coupling mechanism, defining an opening in the mask body, and extending from an outer surface of the mask body; wherein the coupling mechanism comprises a proximal portion proximal to the outer surface of the mask body, a plurality of protrusions extending from the proximal portion away from the outer surface of the mask body, and a flange between the outer surface and the proximal portion, wherein the coupling mechanism of the at least one filter attachment port is configured to connect to a replaceable filter, and the flange is configured to provide a seal between the mask body and the replaceable filter.

[0010] In some embodiments of the reusable mask, the proximal portion and the plurality of projections surround an opening in the mask body.

[0011] In some embodiments of the reusable mask, a plurality of protrusions extending from a proximal portion of the coupling mechanism are configured to support the replaceable filter by separating portions of the filter media of the replaceable filter when the replaceable filter is attached to at least one filter attachment port.

[0012] In some embodiments of the reusable mask, the coupling mechanism includes a connecting portion between the outer surface of the mask body and the proximal portion, wherein the connecting portion has a diameter that is smaller than a diameter of the proximal portion.

[0013] In some embodiments of the reusable mask, the connecting portion is cylindrical.

[0014] In some embodiments of the reusable mask, the replaceable filter is configured to snap onto the proximal portion of the coupling mechanism such that the opening of the replaceable filter surrounds the coupling portion.

[0015] In some embodiments of the reusable mask, the coupling mechanism comprises a compression ring comprising a flange.

[0016] In some embodiments of the reusable mask, the compression ring is integral to the one-piece mask body.

[0017] In some embodiments of the reusable mask, the compression ring is a separate component from the one-piece mask body.

[0018] In some embodiments of the reusable mask, the compression ring forms an axial seal between the mask and the replaceable filter.

[0019] In some embodiments of the reusable mask, the coupling mechanism is configured to receive a replaceable filter via a snap-fit ​​mechanism.

[0020] In some embodiments of the reusable mask, the plurality of protrusions extending from the proximal portion are triangular shaped and the coupling mechanism is configured to receive a replaceable filter via a twist and lock mechanism.

[0021] In some embodiments of the reusable mask, the mask body comprises a transparent polymer.

[0022] In some embodiments of the reusable mask, the mask body comprises a polymer having a transmittance of 80% or greater.

[0023] In some embodiments of the reusable mask, the mask body includes one of silicone or thermoplastic polyurethane.

[0024] In some embodiments of the reusable mask, the reusable mask includes an edge facing the user, the edge including a textured surface, wherein the edge is configured to contact the user's face when the reusable mask is properly worn by the user.

[0025] In some embodiments, a reusable mask is provided, which includes: a mask body, which is configured to cover the nose and mouth of a human face and includes at least one filter attachment port, wherein the at least one filter attachment port includes a coupling mechanism, defines an opening in the mask body, and extends from the outer surface of the mask body; wherein the coupling mechanism includes a rigid plastic portion and a flange, the rigid plastic portion includes at least a portion of a proximal portion of the coupling mechanism close to the outer surface of the mask body and a plurality of protrusions extending from the proximal portion away from the outer surface of the mask body, and the flange is positioned between the outer surface and the proximal portion, wherein the coupling mechanism of the at least one filter attachment port is configured to be connected to a replaceable filter, and the flange is configured to provide a seal between the mask body and the replaceable filter.

[0026] In some embodiments of the reusable mask, the proximal portion and the plurality of protrusions surround an opening in the mask body.

[0027] In some embodiments of the reusable mask, the multiple protrusions of the coupling mechanism of at least one filter attachment port are configured to support the replaceable filter by separating multiple portions of the filter media of the replaceable filter when the replaceable filter is attached to the at least one filter attachment port.

[0028] In some embodiments of the reusable mask, the coupling mechanism includes a connecting portion between the outer surface of the mask body and the proximal portion, wherein a diameter of the connecting portion is smaller than a diameter of the proximal portion.

[0029] In some embodiments of the reusable mask, the connecting portion is cylindrical.

[0030] In some embodiments of the reusable mask, the replaceable filter is configured to snap onto the proximal portion of the coupling mechanism until the opening of the replaceable filter surrounds the connecting portion, thereby positioning the flange between the replaceable filter and the outer surface of the mask body.

[0031] In some embodiments of the reusable mask, the coupling mechanism comprises a compression ring comprising a flange.

[0032] In some embodiments of the reusable mask, the compression ring is integral to the one-piece mask body.

[0033] In some embodiments of the reusable mask, the compression ring is a separate component from the one-piece mask body.

[0034] In some embodiments of the reusable mask, the compression ring forms an axial seal between the mask and the replaceable seal.

[0035] In some embodiments of the reusable mask, the proximal portion includes a plurality of protrusions and a plurality of openings between the plurality of protrusions.

[0036] In some embodiments of the reusable mask, the proximal portion includes rigid plastic and silicone components.

[0037] In some embodiments of the reusable mask, the mask body comprises a transparent polymer.

[0038] In some embodiments of the reusable mask, the mask body comprises a polymer having a transmittance of 80% or greater.

[0039] In some embodiments of the reusable mask, the mask body includes one of silicone or thermoplastic polyurethane.

[0040] In some embodiments of the reusable mask, the rigid plastic portion includes polycarbonate.

[0041] In some embodiments of the reusable mask, the reusable mask includes an edge facing the user, the edge including a textured surface, wherein the edge is configured to contact the user's face when the reusable mask is properly worn by the user.

[0042] In some embodiments, a reusable mask is provided, comprising: a mask body configured to cover a nose and a mouth of a human face, and comprising at least one filter attachment port and a user-facing edge, the edge comprising a textured surface, wherein the at least one filter attachment port is configured to connect to a replaceable filter, and the edge is configured to contact the user's face when the reusable mask is properly worn by the user.

[0043] In some embodiments of the reusable mask, the mask body is a one-piece mask.

[0044] In some embodiments of the reusable mask, the only portion of the mask body that is configured to come into contact with the user's face when the reusable mask is properly worn is the textured edge that faces the user.

[0045] In some embodiments of the reusable mask, the textured edge is formed using an injection mold to have one of a D1, D2, or D3 surface / finish.

[0046] In some embodiments of the reusable mask, at least one filter attachment port includes a coupling mechanism that defines an opening in the mask body and extends from an outer surface of the mask body.

[0047] In some embodiments of the reusable mask, the coupling mechanism includes a proximal portion proximal to the outer surface of the mask body, a plurality of protrusions extending from the proximal portion away from the outer surface of the mask body, and a flange between the outer surface and the proximal portion, wherein the flange is configured to provide a seal between the mask body and the replaceable filter.

[0048] In some embodiments of the reusable mask, the coupling mechanism comprises a compression ring comprising a flange.

[0049] In some embodiments of the reusable mask, the compression ring is integral to the one-piece mask body.

[0050] In some embodiments of the reusable mask, the compression ring is a separate component from the one-piece mask body.

[0051] In some embodiments of the reusable mask, the compression ring forms an axial seal between the mask and the replaceable filter.

[0052] In some embodiments of the reusable mask, the mask body comprises a transparent polymer.

[0053] In some embodiments of the reusable mask, the mask body comprises a polymer having a transmittance of 80% or greater.

[0054] In some embodiments of the reusable mask, the mask body includes one of silicone or thermoplastic polyurethane.

[0055] In some embodiments, any one or more of the features, characteristics, or elements described above with respect to any embodiment may be incorporated into any other embodiment mentioned above or described elsewhere herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 shows a perspective view of a reusable mask with two attached filters, a nose piece, and a strap according to some embodiments;

[0057] Figure 2A-2I shows various views of a reusable mask and filter according to some embodiments;

[0058] 3A and 3B show views of a reusable mask body having a resilient plug snap coupling mechanism configured to removably receive a filter according to some embodiments;

[0059] Figure 4A and 4Bshows a view of a reusable mask body having a cantilever snap-on insert (with a fill coupling mechanism) configured to removably receive a filter according to some embodiments;

[0060] Figure 5A and 5B shows a view of a reusable mask body having a cantilever snap-on insert (without a fill coupling mechanism) configured to removably receive a filter according to some embodiments;

[0061] Figures 6A-6C Various views of a compression ring that may be used to provide a better seal in some embodiments are shown.

[0062] Fig. 7A and 7B shows a view of a reusable mask body having a twist and lock elastic coupling mechanism configured to removably receive a filter according to some embodiments;

[0063] Figures 8A-8E shows various views of a reusable mask body having a textured contact portion according to some embodiments;

[0064] Figures 9A-9D showing various views of a reusable mask having a textured contact portion according to some embodiments; and

[0065] Fig. 10A and 10B Front and back images of a high filtration reusable mask with textured contact portions according to some embodiments are shown, respectively. DETAILED DESCRIPTION

[0066] This article introduces a high-filtration reusable mask with various coupling mechanisms (the coupling mechanism is arranged to make the filter removably coupled to the high-filtration reusable mask), and a high-filtration reusable mask with a textured contact portion, which is arranged to reduce the stickiness of the mask body to the user. As described above, the high-filtration reusable mask using a replaceable filter includes an attachment port arranged to receive a replaceable filter. The coupling mechanism described herein allows the replaceable filter to be easily attached to the reusable mask body at the attachment port and easily removed from the reusable mask body, while maintaining a tight seal when the filter is attached to the mask body. The textured contact portion of the reusable mask body is positioned around the periphery of the mask body, facing the user's face. Therefore, when the user wears the reusable mask, only the textured contact portion contacts the user's face. The rest of the mask body is arranged to be raised or spaced a certain distance from the user's face. The textured contact portion reduces the stickiness of the mask body, providing a more comfortable fit for the user. A more comfortable and reusable mask can improve the correct wearing, thereby improving the safety of the user.

[0067] In addition, the high-filtration reusable mask provided is made of a polymer having a certain degree of transparency, so that at least a portion of the mask body is transparent. This transparency of the mask body can allow for increased communication between the mask wearer and others. For example, in some embodiments, a transparent polymer can be used to form a transparent or light-transmitting mask body. With a transparent or light-transmitting mask body, another person can determine the facial expressions of the mask wearer and better understand the oral language of the mask wearer because he or she can see the movement of the mask wearer's lips when he or she speaks.

[0068] In some embodiments, the high-filtration reusable masks provided herein can be used in healthcare devices. Currently, only single-use high-filtration masks can be used in healthcare devices. Reusable respirators are not compatible with healthcare standards because they include exhalation valves that destroy the sterile field, and they cannot be sterilized using accepted healthcare practices. However, when the user exhales, the replaceable filter used with the high-filtration reusable masks provided herein does not destroy the sterile field; in addition, the reusable mask body can be sterilized using an autoclave, which is an acceptable sterilization method for healthcare.

[0069] The high-filtration reusable mask provided includes at least one filter attachment port having a filter support structure that can receive a replaceable filter that is removably connected to the filter attachment port. The filter attachment port receives the replaceable filter, so that when the filter is in place on the filter attachment port, the filter support structure of the filter attachment port physically separates the two sheets of filter media of the replaceable filter. Separating the two sheets of filter media allows more air to flow into and out of the filter with each inhalation and exhalation.

[0070] The replaceable filter for a high filtration reusable mask includes two sheets of filter media attached around the outer edge and a support ring. The support ring is attached to the edge of an opening in a sheet of filter media. The support ring is configured to snap onto the support structure of the attachment port of the reusable mask and form an airtight seal with the filter attachment port. Each sheet of filter media can include a spunbond polypropylene layer and / or a meltblown polypropylene layer. The filter media sheet can be any shape, such as but not limited to a circle, a triangle, a rounded triangle, a square, a rounded square, an ellipse, a rhombus, or a rounded rhombus.

[0071] High filtration reusable masks (particularly replaceable filters for high filtration reusable masks) are described in more detail in U.S. application 63 / 180626, the entire contents of which are incorporated herein by reference.

[0072] The following describes (1) a high-filtration reusable mask with a replaceable filter; (2) various connection mechanisms that can be used to fully connect the reusable filter to the high-filtration reusable mask; and (3) a reusable mask body with a textured contact portion, which is used to reduce stickiness and increase comfort.

[0073] High filtration reusable mask with replaceable filters

[0074] A reusable mask with replaceable filters is designed to increase air flow and breathability, to generate less waste, and to increase communication between the mask wearer and others. Figure 1 and 2A -2I details the various advantages of a high filtration reusable mask with a removably attached filter.

[0075] Figure 1 A perspective view of a high filtration reusable mask 100 with a replaceable filter according to some embodiments is shown. As shown, the mask 100 includes a mask body 102, a nose piece 106, a strap 108, and a replaceable filter 130. Each feature is described in detail below.

[0076] The mask body 102 is configured to cover the nose and mouth of a person's face. The inner surface of the mask body 102 faces and contacts the user's face, and the outer surface of the mask body 102 is opposite the inner surface, facing outward and away from the user's face. The material, shape, and thickness of the mask body 102 are designed to provide a comfortable fit to the user while providing a protective fit on the user's face. In some embodiments, the mask body 102 can provide an airtight seal with the user's face. The tighter the seal, the better the protection provided by the mask to the user.

[0077] In some embodiments, the mask body 102 may be made of a light-transmitting or transparent material. For example, suitable light-transmitting / transparent materials include elastomers, such as silicone or thermoplastic polyurethane. In some embodiments, the mask body 102 may be made of a material having a transmittance of 60-100%, 70-100%, 80-100%, 85-100%, 90-100%, or 90-95%. In some embodiments, the mask body 102 may be made of a material having a transmittance less than or equal to about 100%, 95%, 90%, 85%, 80%, 75%, 70%, or 65%. In some embodiments, the mask body 102 may be made of a material having a transmittance greater than or equal to about 60%, 65%, 70%, 75%, 80%, 85%, 90%, or 95%. In some embodiments, the mask body 102 may be made of a material having a hardness of 40-60 or 45-55. In some embodiments, the mask body 102 may be made of a material having a hardness less than or equal to about 60, about 55, about 50, or about 45. In some embodiments, the mask body 102 can be made of a material having a hardness greater than or equal to about 40, about 45, about 50, or about 55. The hardness of the material is Shore A hardness, measured using CTM 0099, and press-cured at 150° C. for 5 minutes. Suitable materials for the mask body 102 can include DOW CORNING® C6-750.

[0078] In some embodiments, the mask body 102 can be made of an opaque material. In some embodiments, the mask body 102 can be made with a colorant, dye, or pigment to form a colored mask body 102. In some embodiments, the mask body 102 can be made of a single piece. For example, the mask body 102 can be made by injection molding to form a single-piece mask body 102. In some embodiments, the mask body 102 is a single piece formed using a two-piece injection mold.

[0079] The nose piece 106 comprises a relatively thin metal piece attached to the outer surface of the mask body 102. The nose piece 106 can be positioned adjacent to the upper edge of the mask body 102 and aligned with the position of the user's nose bridge. In some embodiments, the nose piece 106 is bendable to allow the user to bend and shape the nose piece 106 to create a personalized fit with the user's nose bridge. This can ensure a better fitting and more comfortable mask, and therefore ensure better protection.

[0080] In some embodiments, the nose piece 106 comprises a metal, such as aluminum, steel, stainless steel, or brass. In some embodiments, the nose piece 106 is connected to the mask body 102 by snapping onto one or more coupling protrusions. The one or more coupling protrusions are formed as part of the one-piece mask body 102 and extend from the outer surface of the mask body 102. In some embodiments, the coupling protrusion includes a distal portion and a proximal portion, and the proximal portion is connected to the mask body 102. In some embodiments, the proximal portion is cylindrical in shape, and the distal portion extends radially, so that the distal portion is slightly larger than the proximal portion in the lateral direction.

[0081] The strap 108 is configured to be attached to the mask body 102 at two or more locations. At least one attachment location is on the right side of the mask body 102, and at least one attachment location is on the left side of the mask body 102, the left side corresponds to the left cheek of the user when wearing the mask, and the right side corresponds to the left cheek of the user when wearing the mask, and the right side is opposite to the left side. The strap 108 is configured to wrap around the user's head and help keep the mask body 102 in place on the user's face. In some embodiments, the strap 108 can be adjustable (e.g., a tie, a sliding adjustable clip, etc.). In some embodiments, two straps 108 can be used to keep the mask body 102 on the user's face. In some embodiments, the strap 108 is configured to be clamped on the mask body 102. The strap 108 can be made of, for example, an elastic material, cotton, silicone, or other suitable materials.

[0082] The mask 100 is shown as having two replaceable filters 130, each of which is attached to a filter attachment port extending from the outer surface of the mask body 102. The filter 130 includes two sheets of filter media attached at the outer edge. As shown, the two sheets of filter media are attached along the outer edge, along a rounded square profile. When not attached to the mask body 102, the filter 130 is in a contracted or flat configuration. When attached to the filter attachment port of the mask body 102, the filter 102 takes an open or expanded configuration. Due to the support structure of the filter attachment port, the filter 130 is in an expanded configuration. The filter attachment port is configured to receive the filter 130 at the opening, so that the support structure of the filter attachment port extends into the filter 130, and a portion of the first filter medium is separated from a portion of the second filter medium.

[0083] The filter 130 can be in the shape of a rounded square, as shown. Other suitable shapes can include a circle, an oval, a square, a triangle, a rounded triangle, etc. The filter 130 can be configured to be removably attached to the mask body 102 so that the filter 130 can be replaced. Regularly replacing the filter 130 can help maintain optimal air flow, optimal filtration, and optimal protection against airborne particles. In some embodiments, the filter 130 can be a disposable filter.

[0084] Figure 2A-2I Various views and components of a high filtration reusable mask according to some embodiments are shown. As shown in the figure, Figure 2A shows a front view of a mask with two replaceable filters, Figure 2B shows a top view of a mask with two replaceable filters, Figure 2C shows a side view of a replaceable filter, Figure 2D shows the rear view of the replaceable filter, Figure 2E An exploded view of a mask with a replaceable filter is shown, Figure 2F An enlarged view of the strip attachment location is shown. Figure 2G An enlarged front view of the filter attachment port is shown. Figure 2H shows a side view of the filter attachment port, and Fig.2I A perspective view of the filter attachment port is shown. The drawings will be described in detail below.

[0085] Figure 2A A front view of a mask 240 with two replaceable filters according to some embodiments is shown. As shown, the mask 240 includes two replaceable filters 230 and two strap attachment locations 232.

[0086] Figure 2BA top view of a mask 240 with two replaceable filters is shown according to some embodiments. In some embodiments, the thickness of the mask 240 (measured from the inner surface to the outer surface) can be between about 0.5 mm and about 3 mm, or between about 1 mm and about 2 mm. In some embodiments, the thickness of the mask 240 can be less than or equal to about 3 mm, 2.8 mm, 2.6 mm, 2.4 mm, 2.2 mm, 2 mm, 1.8 mm, 1.6 mm, 1.4 mm, 1.2 mm, 1 mm, 0.8 mm, or 0.6 mm. In some embodiments, the thickness of the mask 240 can be greater than or equal to about 0.5 mm, 0.6 mm, 0.8 mm, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm, 2.2 mm, 2.4 mm, 2.6 mm, or 2.8 mm. If the thickness of the mask 240 is too thick, the mask will be uncomfortable to wear. If the thickness of the mask 240 is too thin, it will not be rigid enough to form a protective seal with the user's face. In addition, the mask 240 may include Figure 1 Any features of the mask 100.

[0087] Figure 2C A side view of a filter 230 according to some embodiments is shown. The filter 230 includes a first sheet of filter media 234 and a second sheet of filter media 236. As shown, when the filter 230 is not attached to the mask, it is in a collapsed or flat configuration. The first sheet of filter media 234 is attached to the second sheet of filter media 236 at the outer edges. Between the outer edges of the filter 230, the first sheet of filter media 234 and the second sheet of filter media 236 are not attached.

[0088] Figure 2D 2 shows a rear view of the filter 230 according to some embodiments. Specifically, Figure 2D Filter 230 of FIG. 2 shows second sheet of filter media 236 , opening 242 through second sheet of filter media 236 , the inner surface of first sheet of filter media 234 , and support ring 226 .

[0089] When attached to the mask, the second filter medium 236 is arranged to face the outer surface of the mask. As shown, an opening 242 is formed to pass through the first filter medium 234, and the opening 242 is used to receive the support structure of the filter attachment port of the mask body. The support structure of the filter attachment port can extend into the filter 230 and press against the inner surface of the second filter medium 236. By pressing against the inner surface of the second filter medium 236, the filter 230 changes from a flat contracted configuration to an expanded or open configuration. In the expanded or open configuration, the support structure of the filter attachment port separates a portion of the second filter medium 236 from a portion of the first filter medium 234. In this configuration, the two filter media remain attached to each other at the outer edges. However, the separation increases the internal volume of the filter 230, thereby allowing more air to enter and leave the filter 230 (i.e., through the first filter medium 234 or the second filter medium 236), and increases the breathability of the mask for the user.

[0090] The opening 242 can have a diameter of about 10-40 mm, 15-35 mm, or 20-30 mm. In some embodiments, the opening 242 can have a diameter less than or equal to about 40, 35, 30, 25, 20, or 15 mm. In some embodiments, the opening 242 can have a diameter greater than or equal to about 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, or 35 mm.

[0091] The support ring 226 can be attached to the edge of the opening 242. The support ring is configured to provide support for the filter 230 and is connected to the filter attachment port of the mask body. In some embodiments, the inner surface of the support ring 226 can be configured to provide a seal with the filter attachment port of the mask body. In some embodiments, the inner surface of the support ring 226 can be configured to provide an airtight seal with the filter attachment port of the mask body. The support ring 226 can include a rigid polymer, such as polypropylene or polylactic acid. In some embodiments, the support ring 226 can be biodegradable (e.g., polylactic acid). In some embodiments, the support ring 226 can have an inner diameter (i.e., the diameter of the opening of the support ring 226) of 15-40mm, 20-35mm, or 25-30mm. In some embodiments, the support ring 226 can have an inner diameter less than or equal to about 40mm, about 35mm, about 40mm, about 25mm, or about 20mm. In some embodiments, the support ring 226 can have an inner diameter greater than or equal to about 15 mm, about 20 mm, about 25 mm, about 30 mm, or about 35 mm.

[0092] Figure 2E A side exploded view of a mask 240 having a filter 230 is shown according to some embodiments. Specifically, Figure 2EA mask 240 is shown that includes an attachment location 232 for a strap and a filter attachment port 204. The attachment location 232 will be referenced to Figure 2F In more detail, the filter attachment port 204 will be referred to Figure 2G-2I More details.

[0093] Figure 2F An enlarged view of a strap attachment location 232 according to some embodiments is shown. A mask according to some embodiments may include two strap attachment locations 232, one on each side of the mask. Specifically, a first strap attachment location 232 may be located on the right side of the mask body (e.g., a location corresponding to the user's right cheek), and a second strap attachment location 232 may be located on the left side of the mask body (e.g., a location corresponding to the user's left cheek). In some embodiments, the mask body may include four or more strap attachment locations 232. In some embodiments, the strap attachment location 232 may be configured to receive a strap by tying (i.e., tying the strap to the strap attachment location). In some embodiments, the strap attachment location 232 may be configured to receive a strap by clamping (i.e., the strap is clamped to the strap attachment location 232).

[0094] Figure 2GAn enlarged front view of a filter attachment port 204 according to some embodiments is shown. As shown, the filter attachment port 204 includes a central opening 210 and a distal portion 246. In some embodiments, the distal portion 246 includes a support structure. The filter attachment port 204 extends from the outer surface of the mask body, and when the filter is attached to the filter attachment port 204, the support structure of the filter attachment port 204 (e.g., the distal portion 246) extends into the filter. Therefore, the central opening 210 of the filter attachment port 204 allows air to flow into and out of the external environment of the filter and the nose and mouth of the user. The central opening 210 extends through the proximal portion and the distal portion 246 of the filter attachment port 204. The proximal portion is attached to the mask body. The distal portion 246 is attached to the proximal portion. In some embodiments, the distal portion 246 is truncated cone-shaped and has a lower base and an upper base, and the surface area of ​​the lower base is greater than the surface area of ​​the upper base. In some embodiments, the upper and / or lower bases of the truncated cone-shaped distal portion 246 may be circular, triangular, or rounded triangular in shape. In some embodiments, the lower base of the distal portion 246 may be larger than the upper base of the proximal portion and extend radially outwardly beyond the upper base of the proximal portion to form a ledge. In some embodiments, the proximal portion includes a recessed portion for receiving a support ring of a replaceable filter. In some embodiments, the width of the support structure (i.e., the distal portion 246) may be 15-40 mm, 20-35 mm, or 25-30 mm. In some embodiments, the width of the support structure may be less than or equal to approximately 40 mm, approximately 35 mm, approximately 40 mm, approximately 25 mm, or approximately 20 mm. In some embodiments, the width of the support structure may be greater than or equal to approximately 15 mm, approximately 20 mm, approximately 25 mm, approximately 30 mm, or approximately 35 mm.

[0095] When the filter is attached to the filter attachment port 204, the support ring of the filter is pushed onto the distal portion 246 so that the distal portion 246 can be deformed or contracted to allow the support ring to snap / fit. When properly attached to the filter attachment port 204, the support ring surrounds the proximal portion of the filter attachment port 204, and the inner surface of the second sheet of filter media abuts against the upper bottom of the distal portion 246 of the filter attachment port 204. The filter can be removed from the filter attachment port 204 by pulling the support ring of the filter away from the distal portion of the filter attachment port 204. In some embodiments, the replaceable filter is configured to lock or attach to the proximal portion of the filter attachment port 204 and the distal portion 246 of the attachment port 204.

[0096] In some embodiments, the mask body can include 1, 2, 3, 4, 5, 6, 7, or 8 filter attachment ports. In some embodiments, the filter attachment port is configured to receive a single filter. In some embodiments, the filter attachment port is configured to receive two or more filters.

[0097] Figure 2H 204 according to some embodiments. Figure 2H A distal portion 246 (eg, support structure) and a proximal portion 248 of the filter attachment port 204 are shown. The mask body can be manufactured as a single piece, including the filter attachment port.

[0098] As described above, the filter attachment port 204 includes a distal portion 246, which is attached to a proximal portion 248 adjacent to the mask body. In some embodiments, the proximal portion 248 can be cylindrical and have an upper bottom and a lower bottom. In some embodiments, the distal portion can be truncated cone and have an upper bottom and a lower bottom. The lower bottom of the cylindrical proximal portion 248 can be adjacent to the outer surface of the mask body, and the upper bottom of the cylindrical proximal portion 248 can be adjacent to the lower bottom of the truncated cone distal portion 246. As described above, when the filter is connected to the filter attachment port 204, the inner surface of the support ring of the filter abuts against and contacts the sidewall surface of the proximal portion 248. Therefore, the radius of the cylindrical proximal portion 248 is slightly smaller than the inner diameter of the support ring of the filter. In some embodiments, the proximal portion 248 may include a recessed portion to allow the support ring of the filter to be attached to the filter attachment port 204.

[0099] As shown, the lower base of the distal portion 246 is slightly larger than the upper base of the cylindrical proximal portion 248. For example, the lower base of the frustoconical distal portion 246 can extend radially beyond the outer edge of the upper base of the cylindrical proximal portion 248, thereby forming a ledge or ridge. In some embodiments, the proximal portion 248 can include a concave portion, so that the proximal portion 248 is smaller than the distal portion 246.

[0100] Fig.2I A perspective view of the filter attachment port 204 is shown according to some embodiments. The filter attachment port 204 includes a proximal portion 248, a distal portion 246, a central opening 210, and a side opening 250.

[0101] As described above, the filter attachment port 204 is configured to receive the filter so that when the filter is attached to the mask body, it assumes an expanded configuration (because the support structure of the filter attachment port (e.g., the distal portion 246) causes a portion of the two sheets of filter media of the filter to separate). Specifically, one sheet of filter media rests against the upper base of the frustoconical distal portion 246, and the other sheet of filter media is attached to a support ring that surrounds the cylindrical proximal portion 248 of the filter attachment port 204. Therefore, when the filter is connected to the filter attachment port 204, the entire distal portion 246 is positioned within the filter.

[0102] The central opening 210 and the side openings 250 are arranged to allow air to pass between the external environment of the filter and the nose and mouth of the user. Larger openings and a greater number of openings correspond to greater airflow, and therefore greater breathability and comfort for the user. In some embodiments, the filter attachment port 204 may include 1, 2, 3, 4, 5, 6, 7, or 8 side openings 250.

[0103] Connecting mechanism for high filtration reusable masks

[0104] As mentioned above, replaceable filter is attached on the reusable mask at the attachment port. However, various coupling mechanisms are provided to attach replaceable filter on the reusable mask body and remove from the reusable mask body at the attachment port. Each coupling mechanism to be introduced below can make replaceable filter be attached on the reusable mask body easily and remove from the reusable mask body easily. When replaceable filter is suitably connected / attached on the reusable mask, various coupling mechanisms also ensure tight sealing. In certain embodiments, coupling mechanism can provide airtight seal between replaceable filter and reusable mask body.

[0105] In some embodiments, the coupling mechanism can provide an audible and / or tactile indicator to the user so that the user knows when the reusable filter is properly attached to the attachment port of the mask body. For example, when attaching the filter to the mask body, a "snap" sound can be produced once the filter clears the protrusion of the proximal portion of the attachment port. In some embodiments, the coupling mechanism is designed to provide resistance to the user when the reusable filter is being attached to the attachment port, however, once the reusable filter is properly attached, the coupling mechanism no longer provides resistance to the user. In addition, once properly attached, the reusable filter is not easy to slip off.

[0106] Figure 3A-3C shows a view of a reusable mask body 300 having a coupling mechanism 302 that removably receives a filter. Specifically, FIG. 3 includes a resilient plug snap mechanism 302 located on an attachment port 304. The attachment port 304 also includes a flange 322 to help ensure a tight seal. Each feature is described in detail below.

[0107] The mask body 300 is designed to cover the nose and mouth of the user. The mask body 302 may include any features of any other mask bodies described throughout the present invention.

[0108] The filter attachment port 304 may include any features of any other filter attachment port described herein. As shown, the filter attachment port 304 extends from an outer surface of the mask body 304 and includes a support structure defining a central opening.

[0109] The filter attachment port 304 includes a coupling mechanism 302 located at the distal end of the filter attachment port 304. Specifically, Figure 3A and 3B The coupling mechanism 302 shown in the figure is a resilient plug snap mechanism. The resilient plug snap mechanism includes a plurality of protrusions 308 extending from a proximal portion 306 of the attachment port 304. Specifically, the plurality of protrusions 308 extend away from the mask body 300. The plurality of protrusions 308 are designed to separate the two layers of the reusable filter when the filter is properly attached to the attachment port 304. (As described above, the reusable filter includes two layers of filter media.)

[0110] To couple the reusable filter to the attachment port 304, the reusable filter (e.g., a rigid ring of the reusable filter) is snapped onto the proximal portion 306 of the attachment port 304 such that the coupled portion of the filter rests within a space 324 between a protrusion located on the proximal portion 306 of the attachment port 304 and the outer surface of the mask body 300.

[0111] In some embodiments, all components of the resilient plug-and-snap mechanism comprise flexible silicone.

[0112] Figure 4A and 4B Also shown is a view of a reusable mask body 400 having a coupling mechanism 402 for removably receiving a filter. Figure 4A and 4BThe coupling mechanism 402 shown in FIG. 4 is a cantilevered snap-on insert with a filling mechanism. Specifically, the cantilevered snap-on insert with a filling coupling mechanism is located on a filter attachment port 404. The filter attachment port 404 also includes a distal portion 406 and a proximal portion.

[0113] The filter attachment port 404 extends from the outer surface of the mask body 400 and includes a central opening 410. The filter attachment port 404 is configured to receive and retain a filter in the mask body 400, as described in detail above. Moreover, the filter attachment port 404 includes a proximal portion 406 that is positioned adjacent to the outer surface of the mask body 400 and a distal portion that is described in more detail below.

[0114] The distal portion of the filter attachment port 404 including the cantilever snap-on insert with the filling mechanism 402 includes a plurality of protrusions extending from the proximal portion 406 of the filter attachment port 404. The plurality of protrusions 408 extend away from the mask body 400. The proximal end of each protrusion 408 is adjacent to the proximal portion 406 of the filter attachment port 404, and the distal end of each protrusion 408 terminates at a ring 410. In some embodiments, the plurality of protrusions 408 tapers inwardly so that the outer circumference of the ring 410 is smaller than the circumference of the proximal end 406 of the filter attachment port 404. In some embodiments, there are two or more protrusions 408. In some embodiments, there are three, four, five, or six protrusions. The total number of protrusions 408 can affect the integrity and strength of the filter attachment port 404 (e.g., fewer protrusions 408 can provide a stronger filter attachment port 404). In some embodiments, the plurality of protrusions 408 are evenly spaced around the opening 412. In some embodiments, the two-dimensional space between the protrusions 408 is larger than the outer surface area of ​​the protrusions 408. In some embodiments, the outer surface area of ​​the protrusions 408 is larger than the two-dimensional space between the protrusions 408.

[0115] In some embodiments, the attachment port 404 and / or a portion of the coupling mechanism 402 is formed of a rigid plastic that is molded separately from the silicone portion of the mask body 400. For example, the rigid portion may include the plurality of protrusions 408 and the ring 410. Once molded, the rigid portion may be arranged in a mask body mold, and the silicone mask body may be molded so that the silicone portion of the attachment port 404 encapsulates at least a portion of the rigid plastic portion. In some embodiments, a chemical bond is formed between the rigid plastic portion of the attachment port 404 / coupling mechanism 402 and the silicone mask body 400. For example, the rigid plastic portion may include polycarbonate and the mask body 400 may include silicone (e.g., selective self-adhesive silicone). In some embodiments, a mechanical bond is formed between the rigid plastic portion of the attachment port 404 / coupling mechanism 402 and the silicone mask body 400.

[0116] As shown, the space between two adjacent cantilevers includes silicone from the mask body molding. This design can provide greater resistance when snapping the reusable filter onto the attachment port 404 because the individual protrusions 408 or cantilevers cannot bend or yield due to the silicone between the protrusions 408 or cantilevers.

[0117] Figure 5A and 5B A view of a reusable mask body 500 according to some embodiments is shown, which has a coupling mechanism 502 for removably receiving a reusable filter. Specifically, the coupling mechanism 502 is a cantilever snap-on insert without a filler coupling. As shown, the mask body 500 also includes a filter attachment port 504 extending from an outer surface 520 of the mask body 500 and surrounding an opening 512. The filter attachment port 504 includes a proximal portion 506 positioned adjacent to the outer surface 520 of the mask body 500. This special coupling mechanism (i.e., a cantilever snap-on insert without a filler) is characterized by a negative space between each protrusion 508. When the reusable filter is snapped onto the attachment port 504, the negative space can allow the plurality of protrusions 508 to deform more easily.

[0118] The cantilever snap-on insert 502 without a filler coupling includes a plurality of protrusions 508 extending from the outer surface 520 of the mask body 500. The plurality of protrusions 508 surround an inner cylindrical protrusion 514, which includes a proximal portion 518 and a distal portion. The proximal portion 518 may be completely cylindrical and surround the opening 512, which means that the proximal portion 518 may not include any space or cutout along the circumferential surface. However, at the distal portion, the cylindrical protrusion 514 may include a plurality of protrusions 516 extending from the proximal portion 518 of the cylindrical protrusion 514. Each protrusion 516 includes extending from the proximal portion 518 of the cylindrical protrusion 514 and terminating at the ring 510. In some embodiments, the plurality of protrusions 516 taper inwardly so that the outer circumference of the ring 510 is smaller than the circumference of the proximal portion 518 of the cylindrical protrusion 514. In some embodiments, there are two or more protrusions 516. In some embodiments, there are three, four, five, or six protrusions 516. The total number of protrusions 516 affects the integrity and strength of the cylindrical protrusion 514 (e.g., fewer protrusions 516 can provide a stronger cylindrical protrusion 514). In some embodiments, the plurality of protrusions 516 are evenly spaced around the opening 512. In some embodiments, the two-dimensional space between each protrusion 516 is larger than the outer surface area of ​​each protrusion 516. In some embodiments, the outer surface area of ​​each protrusion 516 is larger than the two-dimensional space between each protrusion 516.

[0119] The cylindrical protrusion 514 is considered "inner" because the plurality of protrusions 508 extending from the proximal portion 506 of the filter attachment port 504 can surround the cylindrical protrusion 514. In some embodiments, the plurality of protrusions 508 surround only the proximal portion 518 of the cylindrical protrusion 514. In some embodiments, unlike the plurality of protrusions 516, which can taper, the plurality of protrusions 508 do not taper, but extend linearly from the outer surface 520 of the mask body 500. In some embodiments, there are two or more protrusions 508. In some embodiments, there are three, four, five, or six protrusions 508. The total number of protrusions 508 can affect the integrity and strength of the coupling mechanism 502 (e.g., fewer protrusions 508 can provide a stronger coupling mechanism 502). In some embodiments, the plurality of protrusions 508 are evenly spaced around the opening 512 or the cylindrical protrusion 514. In some embodiments, the two-dimensional space between each protrusion 508 is greater than the outer surface area of ​​each protrusion 508. In some embodiments, the outer surface area of ​​each protrusion 508 is larger than the two-dimensional space between each protrusion 508 .

[0120] In some embodiments, there is no cantilever snap-fit ​​insert that fills the coupling mechanism (e.g. Figure 5A and 5B shown) are designed to be used with a separate compression ring, such as Figure 6A-6B In some embodiments, a cantilever snap-on insert without a filler coupling mechanism may include an integrated compression ring.

[0121] Figures 6A-6C Various views of a compression ring 600 according to some embodiments are shown. As shown, the compression ring 600 includes a flange portion 640 and a base portion 642. The compression ring 600 is configured to slide over the attachment port of a high-filtration reusable mask so that the compression ring 600 is located between the outer surface of the mask body and the reusable filter. The compression ring 600 helps ensure a tight seal between the reusable filter and the mask body.

[0122] The compression ring 600 is configured to slide onto the attachment port of the mask body so that the base portion 642 is adjacent to the outer surface of the mask body. As shown, the bottom surface of the compression ring 600 includes an elevated ridge 644. The elevated ridge 644 is configured to contact the outer surface of the mask body. In addition, the elevated ridge 644 allows an axial seal to be formed between the reusable filter and the mask body.

[0123] In some embodiments, the compression ring 600 can be configured to form a radial seal. In this case, the inner diameter of the compression ring 600 will be slightly smaller than the proximal portion (e.g. Figure 5B The outer diameter of the proximal portion 506).

[0124] When slid onto the attachment port, the flange portion 640 is arranged to face outward. When the reusable filter is coupled to the attachment port, the flange portion 640 is arranged to face and contact the reusable filter. The flange portion 640 particularly helps ensure a tight seal between the reusable filter and the mask. In some embodiments, the compression ring 600 includes silicone.

[0125] The compression ring 600 can be used in conjunction with any of the coupling mechanisms described herein. In some embodiments, the coupling mechanism can have an integrated compression ring and / or flange to form a separate compression ring, such as Figures 6A-6C Compression ring shown.

[0126] Fig. 7A and 7B A view of a reusable mask body 700 according to some embodiments is shown, the mask body 700 having a coupling mechanism 702, which is configured to removably receive a reusable filter. Specifically, the coupling mechanism 702 includes a twist and lock elastic coupling mechanism.

[0127] As shown, the twist and lock elastic coupling mechanism 702 includes a plurality of triangular protrusions 708 extending from the outer surface 720 of the mask body 700. The triangular protrusions 708 are arranged so that they appear to be twisted or twisted. This means that the triangular protrusions 708 are not similar to equilateral triangles, isosceles triangles, or any other symmetrical triangles. On the contrary, the bottom of the triangular protrusion 708 is adjacent to the outer surface 720 of the mask body 700, and the vertex of the triangular protrusion 708 is not centrally located relative to the bottom, but closer to one end of the bottom of the triangular protrusion 708. In some embodiments, one side of the triangular protrusion 708 can extend perpendicular to a plane passing through a point (at which point the side extends from the outer surface 720 of the mask body 700).

[0128] To attach the reusable filter to Fig. 7A and 7B The filter can be twisted onto the attachment port 704 using a twist and lock coupling mechanism. When the filter reaches the proximal portion of the attachment port 704, it clicks or locks into place. The triangular protrusion 708 is designed to separate the two layers of filter media of the filter. The reusable filter can be simply twisted to be removed from the mask body.

[0129] Method for manufacturing mask body

[0130] In some embodiments, the mask body can be molded using injection molding. In some embodiments, the mask body can be a single piece made with a single injection mold and a single injection of silicone.

[0131] In some embodiments, for example, in embodiments of a rigid plastic portion that includes a coupling mechanism / attachment port, the rigid plastic portion can be first manufactured using injection molding. Once manufactured, the rigid plastic portion can be arranged in a second injection mold (i.e., an injection mold for the entire mask body). The mask body injection mold can receive an injection of silicone, so that the silicone is molded around a portion of the rigid plastic portion. Thus, the mask body is formed such that the rigid plastic portion is integrated within the silicone portion.

[0132] Texture contact part

[0133] As described above, high-filtration reusable masks made of polymer materials can provide a sticky or sticky feeling to users. However, it has been found that texturing the surface of reusable polymer masks can reduce the unpleasant sticky / sticky feeling. Therefore, the high-filtration reusable masks according to some embodiments described herein include at least a portion of texturing. In some embodiments, when the user wears the mask correctly, the textured portion contacts the user's face. In some embodiments, the high-filtration reusable mask described herein also includes a non-textured portion. The non-textured portion can be transparent so that the portion of the user's face covered by the mask that is properly worn can be seen by others. In some embodiments, the mask body is wrapped inwardly around the edge to form an inward-facing edge that is in direct contact with the user's face when worn correctly. The surface of the inward-facing edge can be textured to form a more pleasant wearing experience for the user.

[0134] Figures 8A-8E Various views of a reusable mask body 800 with a textured contact portion 830 are shown, according to some embodiments. A filter attachment port 804 is also shown on the mask body 800.

[0135] As shown, the texture contact portion 830 comprises the inner surface of the mask body 800. In some embodiments, the texture contact portion 830 can be positioned only along the border edge of the mask body 800 so that only the texture contact portion 830 contacts the user's face. In some embodiments, when the mask body 800 is properly worn, the only surface of the mask body 800 that contacts the user's face is the texture contact portion 830.

[0136] In some embodiments, the texture contact portion 830 is integral with the mask body 800. In some embodiments, the mask body 800 includes a single piece that includes the texture contact portion 830. In some embodiments, the texture contact portion 830 is formed using an injection mold having a textured surface. In some embodiments, the mask body 800 is formed using an injection mold having a textured surface (to form the texture contact portion 830) and a non-textured surface. The texture contact portion 830 can extend from the front transparent surface and wrap around the interior of the user-facing side of the mask body 800 and curl inward toward the interior.

[0137] Figures 9A-9D Various views of a reusable mask 900 having a textured contact portion 930 are shown according to some embodiments. A filter attachment port 904, strap 932, and nose piece 906 are also shown.

[0138] Fig. 10A and 10BFront and back images of a high filtration reusable mask 1000 with a textured contact portion 1030 are shown, respectively, according to some embodiments.

[0139] In some embodiments, the mask body of the mask 1000 is formed using a single injection mold. In some embodiments, the texture contact portion 1030 is formed using a textured surface treatment (e.g., D1, D2, D3 surface treatment / texture), and the non-textured portion is formed using a polished texture to ensure that the non-textured portion is optically transparent / transparent. Because the contact texture portion 1030 is formed using a textured surface treatment, it is optically translucent / opaque.

[0140] The foregoing descriptions set forth example systems, methods, techniques, parameters, etc. However, it should be recognized that these descriptions are not intended to limit the scope of the invention, but rather are provided as detailed descriptions of example embodiments.

[0141] Although the description herein uses the terms first, second, etc. to introduce various elements, these elements should not be limited by the terms. These terms are only used to distinguish one element from another element.

[0142] The articles "a" and "an" herein refer to one or more (e.g., at least one) grammatical objects. Any range cited herein includes end values. The term "approximately" used throughout the text is used to introduce and explain small fluctuations. For example, "approximately" can mean that a numerical value can vary by ±0.05%, ±0.1%, ±0.2%, ±0.3%, ±0.4%, ±0.5%, ±1%, ±2%, ±3%, ±4%, ±5%, ±6%, ±7%, ±8%, ±9%, ±10% or more. Whether or not it is explicitly stated, all numerical values ​​are modified by the term "approximately". Numerical values ​​modified by the term "approximately" include specifically determined values. For example, "about 5.0" includes 5.0.

[0143] The term "substantially" is similar to "approximately" in that a defined term can vary from the definition by, for example, ±0.05%, ±0.1%, ±0.2%, ±0.3%, ±0.4%, ±0.5%, ±1%, ±2%, ±3%, ±4%, ±5%, ±6%, ±7%, ±8%, ±9%, ±10% or more; for example, the term "substantially perpendicular" can mean that a 90° perpendicular angle can mean "approximately 90°". The term "generally" can be equivalent to "substantially".

[0144] For any of the structural and functional features described herein, methods for determining such features are known in the art.

Claims

1. A reusable mask comprising: a one-piece mask body configured to cover a nose and a mouth of a human face and comprising at least one filter attachment port, wherein the at least one filter attachment port comprises a coupling mechanism defining an opening in the mask body and extending from an outer surface of the mask body; The coupling mechanism includes a proximal portion close to the outer surface of the mask body, a plurality of protrusions extending from the proximal portion away from the outer surface of the mask body, and a flange between the outer surface and the proximal portion. Wherein, the coupling mechanism of the at least one filter attachment port is configured to be connected to a replaceable filter, and the flange is used to provide a seal between the mask body and the replaceable filter.

2. The reusable mask according to claim 1, wherein: The proximal portion and the plurality of projections surround the opening in the mask body.

3. A reusable mask according to claim 1 or 2, wherein: The plurality of projections extending from a proximal portion of the coupling mechanism are configured to support the replaceable filter by separating portions of a filter media of the replaceable filter when the replaceable filter is attached to the at least one filter attachment port.

4. A reusable mask according to any one of claims 1 to 3, wherein: The coupling mechanism includes a connecting portion located between the outer surface of the mask body and the proximal portion, and the diameter of the connecting portion is smaller than the diameter of the proximal portion.

5. The reusable mask according to claim 4, wherein: The connecting portion is cylindrical.

6. A reusable mask according to claim 4 or 5, wherein: The replaceable filter is arranged to snap onto the proximal portion of the coupling mechanism such that the opening of the replaceable filter surrounds the connecting portion.

7. A reusable mask according to any one of claims 1 to 6, wherein: The coupling mechanism comprises a compression ring including said flange.

8. A reusable mask according to any one of claims 1 to 7, wherein: The compression ring is integral with the one-piece mask body.

9. A reusable mask according to any one of claims 1 to 7, wherein: The compression ring is a separate component from the one-piece mask body.

10. A reusable mask according to any one of claims 7 to 9, wherein: The compression ring forms an axial seal between the mask and the replaceable filter.

11. A reusable mask according to any one of claims 1 to 10, wherein: The coupling mechanism is configured to receive the replaceable filter via a snap-fit ​​mechanism.

12. A reusable mask according to any one of claims 1 to 10, wherein: The plurality of projections extending from the proximal portion are triangular shaped, and a coupling mechanism is configured to receive the replaceable filter via a twist and lock mechanism.

13. A reusable mask according to any one of claims 1 to 12, wherein: The mask body comprises a transparent polymer.

14. A reusable mask according to any one of claims 1 to 13, wherein: The mask body includes a polymer having a transmittance of 80% or higher.

15. A reusable mask according to any one of claims 1 to 14, wherein: The mask body includes one of silicone or thermoplastic polyurethane.

16. A reusable mask according to any one of claims 1 to 15, wherein: The reusable mask includes an edge facing the user, the edge including a textured surface, wherein the edge is configured to contact the user's face when the reusable mask is properly worn by the user.

17. A reusable mask comprising: a mask body for covering a nose and a mouth of a human face and comprising at least one filter attachment port, wherein the at least one filter attachment port comprises a coupling mechanism, defines an opening in the mask body, and extends from an outer surface of the mask body; The coupling mechanism comprises a rigid plastic portion and a flange, wherein the rigid plastic portion comprises at least a portion of a proximal portion of the coupling mechanism close to the outer surface of the mask body and a plurality of protrusions extending from the proximal portion away from the outer surface of the mask body, and the flange is positioned between the outer surface and the proximal portion. Wherein, the coupling mechanism of the at least one filter attachment port is configured to connect to a replaceable filter, and the flange is configured to provide a seal between the mask body and the replaceable filter.

18. The reusable mask of claim 17, wherein: The proximal portion and the plurality of projections surround the opening in the mask body.

19. A reusable mask according to claim 17 or 18, wherein: The plurality of projections of the coupling mechanism of the at least one filter attachment port are configured to support the replaceable filter by separating portions of a filter media of the replaceable filter when the replaceable filter is attached to the at least one filter attachment port.

20. A reusable mask according to any one of claims 17 to 19, wherein: The coupling mechanism includes a connecting portion located between the outer surface of the mask body and the proximal portion, wherein a diameter of the connecting portion is smaller than a diameter of the proximal portion.

21. The reusable mask of claim 20, wherein: The connecting portion is cylindrical.

22. A reusable mask according to claim 20 or 21, wherein: The replaceable filter is configured to snap onto the proximal portion of the coupling mechanism until the opening of the replaceable filter surrounds the connecting portion, thereby positioning the flange between the replaceable filter and the outer surface of the mask body.

23. A reusable mask according to any one of claims 17 to 22, wherein: The coupling mechanism comprises a compression ring including said flange.

24. The reusable mask of claim 23, wherein: The compression ring is integral with the one-piece mask body.

25. A reusable mask according to claim 23 or 24, wherein: The compression ring is a separate component from the one-piece mask body.

26. A reusable mask according to any one of claims 24-25, wherein: The compression ring forms an axial seal between the mask and the replaceable seal.

27. A reusable mask according to any one of claims 17 to 26, wherein: The proximal portion includes a plurality of protrusions and a plurality of openings between the plurality of protrusions.

28. A reusable mask according to any one of claims 17 to 27, wherein: The proximal portion includes rigid plastic and silicone components.

29. A reusable mask according to any one of claims 17-28, wherein: The mask body comprises a transparent polymer.

30. A reusable mask according to any one of claims 17-29, wherein: The mask body includes a polymer having a transmittance of 80% or higher.

31. A reusable mask according to any one of claims 17 to 30, wherein: The mask body includes one of silicone or thermoplastic polyurethane.

32. A reusable mask according to any one of claims 17 to 31, wherein: The rigid plastic portion comprises polycarbonate.

33. The reusable mask according to any one of claims 17-32, further comprising: A user-facing edge comprising a textured surface, wherein the edge is configured to contact a user's face when the reusable mask is properly worn by the user.

34. A reusable mask comprising: A mask body for covering a nose and a mouth of a human face and comprising at least one filter attachment port and a user-facing edge, the edge comprising a textured surface, Wherein, the at least one filter attachment port is configured to be connected to a replaceable filter, and the edge is configured to contact the user's face when the reusable mask is properly worn by the user.

35. The reusable mask of claim 34, wherein: The mask body is a one-piece mask.

36. A reusable mask according to claim 34 or 35, wherein: The only portion of the mask body that is arranged to come into contact with the user's face when the reusable mask is properly worn is the textured user-facing edge.

37. A reusable mask according to any one of claims 34-36, wherein: The textured edge is formed using an injection mold to have one of a D1, D2 or D3 surface / finish.

38. A reusable mask according to any one of claims 34-37, wherein: The at least one filter attachment port includes a coupling mechanism, defines an opening in the mask body, and extends from an outer surface of the mask body.

39. The reusable mask of claim 38, wherein: The coupling mechanism includes a proximal portion close to the outer surface of the mask body, a plurality of protrusions extending from the proximal portion away from the outer surface of the mask body, and a flange between the outer surface and the proximal portion, wherein the flange is configured to provide a seal between the mask body and the replaceable filter.

40. A reusable mask according to claim 38 or 39, wherein: The coupling mechanism comprises a compression ring including said flange.

41. The reusable mask of claim 40, wherein: The compression ring is integral with the one-piece mask body.

42. The reusable mask of claim 40, wherein: The compression ring is a separate component from the one-piece mask body.

43. A reusable mask according to any one of claims 40-42, wherein: The compression ring forms an axial seal between the mask and the replaceable filter.

44. A reusable mask according to any one of claims 34-43, wherein: The mask body comprises a transparent polymer.

45. A reusable mask according to any one of claims 34-44, wherein: The mask body includes a polymer having a transmittance of 80% or higher.

46. ​​A reusable mask according to any one of claims 34-45, wherein: The mask body includes one of silicone or thermoplastic polyurethane.

Images