Dual filtration COVID-19 mask

A mask includes: an intake valve panel comprising one or more intake valves, the intake valve panel further comprising an intake filter configured to filter the user's intake breath, the intake valve panel positioned in a center of the mask; one or more exhaust tubes, at least one of the one or more exhaust tubes comprising at least one of the exhaust valves, at least one of the exhaust tubes configured to conduct the user's exhale breath through the at least one of the exhaust valves and then out of the mask, at least one exhaust tube holding the at least one exhaust valve tightly while allowing the at least one exhaust valve to open and close freely; and a soft foam lining configured to tightly hold the mask against the user's face.

SUMMARY

A dual filtration Coronavirus-19 (COVID-19) mask is provided.

A dual filtration COVID-19 mask includes: an intake valve panel comprising one or more intake valves, the intake valve panel positioned in an approximate center of the mask, the intake valves configured to open to transmit a user's intake breath, the intake valves further configured to close promptly after transmission of the user's intake breath and prior to the user's next exhale breath, the intake valve panel further comprising an intake filter configured to filter the user's intake breath; one or more exhaust valves, the one or more exhaust valves positioned to a side of the mask, the exhaust valves configured to open to transmit the user's exhale breath, the exhaust valves further configured to close promptly after transmission of the user's exhale breath and prior to the user's next intake breath; one or more exhaust tubes, at least one of the one or more exhaust tubes comprising at least one of the exhaust valves, at least one of the exhaust tubes configured to conduct the user's exhale breath through the at least one of the exhaust valves and then out of the mask, at least one exhaust tube holding the at least one exhaust valve tightly while allowing the at least one exhaust valve to open and close freely; a soft foam lining configured to tightly hold the mask against the user's face; and a hard foam lining attached to the mask, the hard foam lining attached to the soft foam lining, the hard foam lining configured to hold the intake valve panel at a distance from the user's face, thereby allowing the intake valves to open and close freely.

A dual filtration COVID-19 mask includes: an intake valve panel comprising exactly four valves, the intake valve panel positioned in an approximate center of the mask, each of the intake valves configured to open to transmit a user's intake breath, each of the intake valves further configured to close promptly after transmission of the user's intake breath and prior to the user's next exhale breath, the intake valve panel further comprising an intake filter configured to filter the user's intake breath; one or more exhaust valves configured to open to transmit the user's exhale breath, the one or more exhaust valves positioned to a side of the mask, each of the exhaust valves further configured to close promptly after transmission of the user's exhale breath and prior to the user's next intake breath; one or more exhaust tubes, at least one of the one or more exhaust tubes comprising at least one of the exhaust valves, at least one of the exhaust tubes configured to conduct the user's exhale breath through the at least one of the exhaust valves and then out of the mask, at least one exhaust tube holding the at least one exhaust valve tightly while allowing the at least one exhaust valve to open and close freely; a soft foam lining configured to tightly hold the mask against the user's face; a base configured firmly to hold the intake valve panel and at least one of the exhaust tubes, wherein at least one exhaust tube passes through the base to an outside of the mask, so as to conduct the user's exhale breath out through the exhaust tube, wherein at least one exhaust tube further comprises an exhaust filter configured to filter the user's exhale breath, wherein the exhaust filter attaches to an end of the exhaust tube opposite the exhaust tube end comprising the exhaust valve, wherein the exhaust valve comprises an exhaust valve diameter slightly smaller than an exhaust tube diameter of the exhaust tube; and a hard foam lining attached to the soft foam lining, the hard foam lining attached to the base on an opposite side of the hard foam lining from the soft foam lining, the hard foam lining configured to hold the intake valve panel at a distance from the user's face, thereby allowing the intake valves to open and close freely.

A dual filtration COVID-19 mask configured to allow a user to breathe includes: an intake valve panel comprising exactly four intake valves, the intake valve panel positioned in an approximate center of the mask, each of the intake valves comprising check valves, each of the intake valves configured to open to transmit a user's intake breath, each of the intake valves further configured to close promptly after transmission of the user's intake breath and prior to the user's next exhale breath; an intake filter configured to filter the user's intake breath, the intake filter attached to the intake valve panel, the intake filter positioned adjacent to and outside of the intake valve panel; one or more exhaust valves configured to open to transmit the user's exhale breath, the one or more exhaust valves positioned to a side of the mask, each of the exhaust valves comprising check valves, each of the exhaust valves further configured to close promptly after transmission of the user's exhale breath and prior to the user's next intake breath, wherein each of the exhaust valves is located approximately three-eighths of an inch from the end of the exhaust tube opposite the exhaust tube end comprising the exhaust valve; one or more exhaust tubes, at least one of the one or more exhaust tubes comprising at least one of the exhaust valves, at least one of the exhaust tubes configured to conduct the user's exhale breath through the at least one of the exhaust valves and then out of the mask, at least one exhaust tube holding the at least one exhaust valve tightly while allowing the at least one exhaust valve to open and close freely; a soft foam lining configured to tightly hold the mask against the user's face; a base configured firmly to hold the intake valve panel and at least one of the exhaust tubes, wherein at least one exhaust tube passes through the base to an outside of the mask, so as to conduct the user's exhale breath out through the exhaust tube, wherein at least one exhaust tube further comprises an exhaust filter configured to filter the user's exhale breath, wherein the exhaust filter attaches to an end of the exhaust tube opposite the exhaust tube end comprising the exhaust valve, wherein the exhaust valve comprises an exhaust valve diameter slightly smaller than an exhaust tube diameter of the exhaust tube, the base further comprising at least one anchor configured to hold the mask base in place on the mask; an intake filter slot configured to receive the intake filter, the intake filter slot further configured to hold the intake filter firmly in place; and a hard foam lining attached to the base on an opposite side of the hard foam lining from the soft foam lining, the hard foam lining configured to hold the intake valve panel at a distance from the user's face.

DETAILED DESCRIPTION

Embodiments of the invention provide a dual filtration COVID-19.

The dual filtration COVID-19 mask allows the user to breathe fresh air in and to exhale through one or more exhaust valves that are positioned a relatively long distance from the intake valve panel comprising the intake valves, so as to prevent the user from inadvertently breathing on the intake breath a substantial amount of air that has been exhaled on a prior exhale breath. Embodiments of the invention allow fresh air to enter through one or more intake valves, preferably but not necessarily comprising one or more check valves, which open when the user is inhaling and close when the user is exhaling. Further embodiments of the invention comprise exhaust valves comprising one or more check valves, which open when the user is exhaling and close when the user is inhaling. A hard foam lining of the mask holds the intake valve panel at a distance from the user's face, thereby allowing the intake valves to open and close freely.

Typically, although not necessarily, and as depicted, the check valve has a shape that is one or more of generally circular, generally oval, and generally elliptical. Typically, although not necessarily, and as depicted, the check valve comprises two small, round hinges configured to allow the valve to open and close freely while not allowing the check valve to move from side to side. A representative dimension of the check valve hinge is approximately a quarter inch. The check valve hinge comprises one or more of copper and a flexible material.

The mask further comprises a base. The base comprises one or more of cardboard, plastic and other materials. For example, the base comprises molded plastic. For example, the base comprises molded, hypoallergenic plastic. The base is firm so as to hold the one-way check valves when they are inserted into the base and secured there. For example, the one-way check valves are secured to the base using one or more of double stick tape and glue.

The base can be constructed using cardboard. Disposable models will typically comprise a cardboard base. Inch-long slices are cut into the cardboard and placed on the top of the cardboard cutout. When pulled together and then fastened with glue or staples, the slices help create a dome-shaped base that fits snugly over the face.

The base will also house the exhaust tubes that in turn hold the one-way exhaust check valves at an exhaust end of the exhaust tube where the exhaust emerges from the exhaust tube. For example, the exhaust check valves are located approximately three-eighths of an inch (⅜ inches) from an exhaust end of the exhaust tube. Accordingly, any chance that the exhaust filter may interfere with the exhaust tube is reduced. Alternatively, or additionally, the exhaust check valves are located at the exhaust end of the exhaust tube.

The exhaust tube passes through the cardboard cutout and is fastened with a staple close to the mouth and can vary in size according to the need to exhale. The other ends of the exhaust tubes coming out of the mask base support the exhaust filters, which attach to the end of the exhaust tubes to filter any exhale coming out of the side of the mask.

The base is also designed to hold one or more of a hard foam lining and a soft foam lining. One or more of the hard foam lining and the soft foam lining create a gap between the one-way check valves and one or more of the user's face and the user's lips. The hard foam lining is configured to hold the intake valve panel at a distance from the user's face. Accordingly, the hard foam lining prevents a user's eyeglasses from steaming up while the user is wearing the mask.

The covering of the face mask is made up of neoprene rubber or other substances with elastic benefits, which is very similar to a snow ski face mask for cold weather. The mask covers the cardboard mask base and is attached to the base, while the cover adheres the mask to the face by attaching together behind the back of the head with Velcro, snapping, or other fastening methods. For the inexpensive and disposable models, the face mask can also be attached behind the ears with an elastic string.

The mask base also holds the exhaust tubes. Preferably, but not necessarily, and as depicted, the exhaust filter is attached to the exhaust tube. Preferably, but not necessarily, and as depicted, an exhaust filter fastener holds the exhaust tube against the mask base. Preferably, but not necessarily, and as depicted, the exhaust filter fastener comprises an elastic band. For example, the exhaust filter fastener comprises a rubber band. The mask base further comprises an intake filter configured to filter a user's intake breath. Preferably, but not necessarily, and as depicted, the intake filter slides in front of the intake valves.

The intake filter is one or more of disposable and washable. For example, an intake filter comprising four intake valves has approximate dimensions of 2″×2.″ Dimensions of the intake filter may vary according to one or more of a mask size and a number of intake valves. The intake filter can comprise multiple filtration materials such as a copper mesh. The copper mesh may provide more protection against one or more of viruses and bacteria.

Exhaust filters attach to exhaust tubes protruding from each side of the face mask. The exhaust filters are configured to filter exhaust emerging from the mask on an exhale by the user. The tubes stick out sufficiently for an elastic end of the exhaust filters to fit snugly on the respective exhaust tubes. The exhaust filter may comprise a copper mesh. The exhaust filter is one or more of disposable and washable. The other end of the exhaust filters are attached to the face covering on each side towards the ear with velcro, snaps, or other fastening devices.

For example, the base comprises cardboard. As described below in more detail inFIGS. 5A-5H, the cardboard base may be constructed by cutting in the base a pair of slices having a length of approximately one inch, and subsequently, by pulling two sides of the mask base together, thereby creating a three-dimensional, domed base. The dome of the mask accommodates a user's mouth. Then one or more of a hard foam lining and a soft foam lining is attached around edges of an inner side of the base. The one or more of the hard foam lining and the soft foam lining helps to keep the mask a distance from lips of the user so that the intake valves are held at a distance from the user's lips.

The exhaust valves have an exhaust valve diameter that is slightly less than an exhaust tube diameter. The exhaust valves are located just inside an end of the respective exhaust tube, for example, approximately ⅜ of an inch from the end of the respective exhaust tube comprising the respective exhaust filter.

Optionally, embodiments of the invention further comprise a sterilization box usable to store one or more dual filtration COVID-19 masks. The sterilization box comprises dimensions comfortably exceeding dimensions of the one or more masks stored in the sterilization box. For example, the sterilization box is usable to store the dual filtration COVID-19 mask at night while it is not being used. For example, the sterilization box comprises an ultraviolet sterilization box configured to use ultraviolet radiation to do one or more of sanitize the mask and sterilize the mask. For example, the sterilization box is usable to do one or more of store the mask, transport the mask, ship the mask, sanitize the mask, and sterilize the mask. The sterilization box may be powered using one or more of non-rechargeable batteries, rechargeable batteries, and another power source.

FIGS. 1A-1Care a set of three drawings showing an exploded view and assembled interior and exterior views of a dual filtration COVID-19 mask100.

FIG. 1Ais a drawing showing an exploded view of the dual filtration COVID-19 mask100as seen from an inside101of the mask100. The mask100is configured to allow the user (not shown) to breathe, showing the mask100prior to use. The mask100comprises a mask left side105A, a mask right side105B (the “left side” and “right side” descriptors are as seen in the interior views shown in this figure and inFIG. 1B), and a mask center107.

The mask100further comprises a mask base108. For example, the mask base108comprises cardboard. For example, the mask base108comprises plastic. For example, the mask base108comprises hard plastic.

The mask base108comprises an intake valve panel120configured to transmit a user's intake breath. The intake valve panel120is further configured to protect one or more of the user (not shown) and others from one or more of COVID-19 and another disease by filtering the user's intake breath to do one or more of provide protection from respiratory disease pathogens and remove respiratory disease pathogens. Preferably, but not necessarily, and as depicted, the intake valve panel120is approximately positioned at the mask center107. The intake valve panel120comprises one or more intake valve assemblies122A-122D.

At least one of the intake valve assemblies122A-122D comprises a respective intake valve123A-123D, at least one of the one or more intake valves123A-123D configured to open to transmit the user's intake breath. Preferably, but not necessarily, and as depicted, each of the intake valves assemblies122A-122D comprises a respective intake valve123A-123D. At least one of the one or more intake valves123A-123D is configured to open to transmit the user's intake breath. Preferably, but not necessarily, and as depicted, each of the one or more intake valves123A-123D is configured to open to transmit the user's intake breath. Preferably, but not necessarily, and as depicted, each of the intake valves123A-123D is configured to close promptly after transmission of the user's intake breath. At least one of the one or more intake valves123A-123D is configured to spring back into place after transmission of the user's intake breath. Preferably, but not necessarily, and as depicted, each of the intake valves123A-123D is configured to spring back into place after transmission of the user's intake breath. As depicted, the intake valve panel120comprises a first intake valve123A, a second intake valve123B, a third intake valve123C, and a fourth intake valve123D. The intake valves123A-123D are closed because the user is not currently breathing an intake breath.

Preferably, but not necessarily, and as depicted, at least one of the intake valves123A-123D has a shape that is one or more of generally circular, generally oval, and generally elliptical. Preferably, but not necessarily, and as depicted, each of the intake valves123A-123D has a shape that is one or more of generally circular, generally oval, and generally elliptical.

For example, at least one of the intake valves123A-123D comprises a check valve. Preferably, but not necessarily, and as depicted, each of the intake valves123A-123D comprises a check valve. Optionally, at least one of the intake valves123A-123D comprises a small intake valve locking tab (not shown in the figure) configured to stop the intake valve123A-123D from moving close to a user's mouth (not shown in the figure). The intake valve locking tab (not shown in this figure) helps in assembly of the mask100.

At least one of the intake valves123A-123D is attached to the intake valve panel120. Preferably, each of the intake valves123A-123D is attached to the intake valve panel120. For example, one or more of the intake valves123A-123D is attached to the intake valve panel120using one or more of double stick tape and glue.

At least one of the intake valve assemblies122A-122D further comprises a respective intake valve base124A-124D. Preferably, but not necessarily, and as depicted, each of the intake valve assemblies122A-122D further comprises a respective intake valve base124A-124D.

At least one of the intake valve assemblies122A-122D further comprises a respective intake valve base124A-124D, the respective intake valve base124A-124D configured to hold the respective intake valve123A-123D while allowing the respective intake valve123A-123D to open and close as needed. Preferably, but not necessarily, and as depicted, each of the intake valve assemblies122A-122D further comprises a respective intake valve base124A-124D.

At least one of the intake valves123A-123D further comprises an intake valve base hole125A-125D, the intake valve base hole125A-125D configured to allow the user's intake breath to pass through the respective intake valve base124A-124D and then through a respective open intake valve123A-123D. At least one of the intake valves123A-123D is attached to the corresponding intake valve base124A-124D by a corresponding intake valve hinge126A-126D. Preferably, but not necessarily, and as depicted, each of the intake valves123A-123D is attached to the corresponding intake valve base124A-124D by a corresponding intake valve hinge126A-126D. At least one of the intake valves123A-123D opens using the corresponding intake valve hinge126A-126D to transmit the user's intake breath. Preferably, but not necessarily, and as depicted, each of the intake valves123A-123D opens using the corresponding intake valve hinge126A-126D to transmit the user's intake breath. After transmission of the user's intake breath, at least one of the intake valves123A-123D closes using the corresponding intake valve hinge126A-126D. Preferably, but not necessarily, and as depicted, each of the intake valves123A-123D closes using the corresponding intake valve hinge126A-126D.

The intake valve panel120further comprises one or more base intake holes127A-127D, wherein at least one of the base intake holes127A-127D is configured snugly to hold a corresponding intake valve123A-123D while allowing the user's intake breath to pass from an outside128of the mask100to the inside101of the mask100. Preferably, but not necessarily, and as depicted, each of the base intake holes127A-127D is configured to snugly hold the corresponding intake valve123A-123D while allowing the user's intake breath to pass from the outside128of the mask100to the inside101of the mask100.

Preferably, but not necessarily, and as depicted, at least one of the intake valves123A-123D comprises a one-way intake valve123A-123D configured to allow passage of the user's intake breath (not shown) from the outside128of the mask100to the inside101of the mask. Preferably, but not necessarily, and as depicted, each of the intake valves123A-123D comprises a one-way intake valve123A-123D configured to allow passage of the user's intake breath from the outside128of the mask100to the inside101of the mask.

The mask base108further comprises a left exhaust valve assembly131A positioned on the left side105A of the mask100. The mask100further comprises a right exhaust valve assembly131B positioned on the right side105B of the mask100.

The left exhaust valve assembly131A comprises a left exhaust valve138A. The right exhaust valve assembly131B further comprises a right exhaust valve138B. One or more of the left exhaust valve138A and the right exhaust valve138B are configured to open to transmit the user's exhale breath. Preferably, but not necessarily, and as depicted, both the left exhaust valve138A and the right exhaust valve138B are configured to open to transmit the user's exhale breath. At least one of the one or more exhaust valves138A-138B is configured to close promptly after transmission of the user's exhale breath. One or more of the left exhaust valve138A and the right exhaust valve138B are configured to close promptly after transmission of the user's exhale breath. Preferably, but not necessarily, and as depicted, each of the exhaust valves138A-138B is configured to close promptly after transmission of the user's exhale breath. To clarify their functionality, the exhaust valves138A-138B are shown as partially open in this exploded view but upon installation, will be closed until the user's first intake breath occurs. The left exhaust valve138A is secured to the base108. The right exhaust valve138B is secured to the base108. For example, one or more of the left exhaust valve138A and the right exhaust valve138B is secured to the base108using one or more of double stick tape and glue.

Preferably, but not necessarily the exhaust valves138A-138B are positioned at respective exhaust-intake distances139A-139B from the intake valve panel120comprising the intake valves123A-123D. The left exhaust valve138A is position at a left exhaust-intake distance139A from the intake valve panel120, and the right exhaust valve138B is positioned at a right exhaust-intake distance139B from the intake valve panel. Preferably, but not necessarily, and as depicted, the left exhaust-intake valve distance139A is approximately equal to the right exhaust-intake valve distance139B. The respective exhaust-intake distances139A-139B are relatively long, so as to prevent the user (not shown) from inadvertently breathing on the intake breath a substantial amount of air that has been exhaled on a prior exhale breath.

Preferably, but not necessarily, and as depicted, at least one of the exhaust valves138A-138B comprises a one-way exhaust valve138A-138B configured to allow passage of the user's intake breath (not shown) from the inside101of the mask100to the outside128of the mask. Preferably, but not necessarily, and as depicted, each of the exhaust valves138A-138B comprises a one-way exhaust valve138A-138B configured to allow passage of the user's intake breath (not shown) from the inside101of the mask100to the outside128of the mask.

The left exhaust valve assembly131A further comprises a left exhaust valve base140A, the left exhaust valve base140A configured to hold the left exhaust valve138A while allowing the left exhaust valve138A to open and close as needed. The left exhaust valve base140A comprises a left exhaust valve base hole141A in an approximate center of the left exhaust valve base140A, the left exhaust valve base hole141A configured to allow the user's exhale breath to pass through the left exhaust valve base140A and then through an open left exhaust valve138A. The right exhaust valve assembly131B further comprises a right exhaust valve base140B, the right exhaust valve base140B configured to hold the right exhaust valve138B while allowing the right exhaust valve138B to open and close as needed. The right exhaust valve base140B comprises a right exhaust valve base hole141B in an approximate center of the right exhaust valve base140B, the right exhaust valve base hole141B configured to allow the user's exhale breath to pass through the right exhaust valve base140B and then through an open right exhaust valve138B.

The left exhaust valve138A is attached to the left exhaust valve base140A by a left exhaust valve hinge142A. The left exhaust valve138A opens using the left exhaust valve hinge142A to transmit the user's exhale breath. After transmission of the user's exhale breath, the left exhaust valve138A closes using the left exhaust valve hinge142A. The right exhaust valve138B is attached to the right exhaust valve base140B by a right exhaust valve hinge142B. The right exhaust valve138B opens using the right exhaust valve hinge142B to transmit the user's exhale breath. After transmission of the user's exhale breath, the right exhaust valve138B closes using the right exhaust valve hinge142B.

The mask100thus comprises the intake valve panel120positioned at the approximate mask center107and the left and right exhaust valves138A-138B respectively positioned on the left and right sides105A-105B of the mask100. Accordingly, the mask100helps ensure that the user is not breathing the user's own exhaust. The mask100also helps ensure that the user has substantially no carbon dioxide intake. The user can use the mask100without fogging eyeglasses of the user. The base108is configured firmly to hold the intake valve panel120.

Preferably, but not necessarily, and as depicted, at least one of the exhaust valves138A-138B has a shape that is one or more of generally circular, generally oval, and generally elliptical. Preferably, but not necessarily, and as depicted, each of the exhaust valves138A-138B has a shape that is one or more of generally circular, generally oval, and generally elliptical. For example, at least one of the left exhaust valve138A and the right exhaust valve138B comprises a check valve. Preferably, but not necessarily, and as depicted, both the left exhaust valve138A and the right exhaust valve138B comprise a check valve. The left exhaust valve138A comprises a left exhaust valve diameter143A. The right exhaust valve138B comprises a right exhaust valve diameter143B.

The left exhaust valve assembly131A further comprises a left exhaust tube145A located on the left side105A of the mask100. The right exhaust valve assembly131B further comprises a right exhaust tube145B located on the right side105B of the mask100. Preferably, but not necessarily, and as depicted, the left exhaust tube145A comprises the left exhaust valve138A. Preferably, but not necessarily, and as depicted, the right exhaust tube145B comprises the right exhaust valve138B. Preferably, but not necessarily, and as depicted, the left exhaust valve138A is located just inside the left exhaust tube145A. Preferably, but not necessarily, and as depicted, the right exhaust valve138B is located just inside the right exhaust tube145B. The left exhaust valve138A and the right exhaust valve138B are closed because the user is not currently breathing an exhale breath. At least one of the exhaust tubes145A-145B passes through the base108to the outside128of the mask, so as to conduct the user's exhale breath out through the respective exhaust tube140A-140B. Preferably, but not necessarily, and as depicted, both of the exhaust tubes145A-145B pass through the base108to the outside128of the mask, so as to conduct the user's exhale breath out through the respective exhaust tubes140A-140B.

The left exhaust tube145A comprises a left exhaust tube inner diameter146A. The right exhaust tube145B comprises a right exhaust tube inner diameter146B. The left exhaust tube145A further comprises a left exhaust tube outer diameter147A. The right exhaust tube145B further comprises a right exhaust tube outer diameter147B. Preferably, but not necessarily, and as depicted, the left exhaust valve diameter143A is roughly equal to and very slightly less than the left exhaust tube inner diameter146A so that the left exhaust valve138A fits snugly inside the left exhaust tube145A. Accordingly, the left exhaust tube145A allows the left exhaust valve138A to open and close freely while holding the left exhaust valve138A tightly. Preferably, but not necessarily, and as depicted, the right exhaust valve diameter143B is roughly equal to and very slightly less than the right exhaust tube inner diameter146B so that the right exhaust valve138B fits snugly inside the right exhaust tube145B. Accordingly, the right exhaust tube145B allows the right exhaust valve138B to open and close freely while holding the right exhaust valve138B tightly. The base108is further configured firmly to hold at least one of the exhaust tubes145A-145B. Preferably, but not necessarily, and as depicted, the base108holds both of the exhaust tubes145A-145B.

For example, the left exhaust valve diameter143A equals approximately five-eighths (⅝) of an inch. For example, the left exhaust tube inner diameter146A equals approximately five-eighths (⅝) of an inch. For example, the left exhaust tube outer diameter147A equals approximately three-fourths (¾) of an inch.

For example, the right exhaust valve diameter143B equals approximately five-eighths (⅝) of an inch. For example, the right exhaust tube inner diameter146B equals approximately five-eighths (⅝) of an inch. For example, the right exhaust tube outer diameter147B equals approximately three-fourths (¾) of an inch.

Preferably, but not necessarily, and as depicted, one or more of the left exhaust tube145A and the right exhaust tube145B comprises hard plastic or other material. Preferably, but not necessarily, and as depicted, both the left exhaust tube145A and the right exhaust tube145B comprises hard plastic or other material. For example, one or more of the left exhaust tube145A and the right exhaust tube145B comprise one or more of transparent material and translucent material. Preferably, both the left exhaust tube145A and the right exhaust tube145B comprise one or more of transparent material and translucent material. Accordingly, the mask100can be placed in a sterilization box (not shown) where it can be sterilized using ultraviolet light.

The left exhaust tube145A further comprises a left exhaust filter150A. Preferably, the left exhaust filter150A is physically attached to the left exhaust tube145A. A first portion (not shown) of the user's exhale breath (not shown) leaves the left exhaust tube145A and enters the left exhaust filter150A, the left exhaust filter150A configured to filter the first portion of the user's exhale breath through the left exhaust tube145A.

The right exhaust tube145B further comprises a right exhaust filter150B. Preferably, the right exhaust filter150B that is physically attached to the right exhaust tube145B. A second portion (not shown) of the user's exhale breath (not shown) leaves the right exhaust tube145B and enters the right exhaust filter150B, the right exhaust filter150B configured to filter the second portion of the user's exhale breath through the right exhaust tube145B. The exhaust filters145A-145B are configured to protect one or more of the user and others from one or more of COVID-19 and another disease by filtering the user's exhaust breath.

Preferably, but not necessarily, and as depicted, one or more of the left exhaust filter150A and the right exhaust filter150B comprises a cloth tube configured to fit tightly onto the respective left exhaust tube145A and the right exhaust tube145B. Preferably, but not necessarily, and as depicted, the left exhaust filter150A comprises a cloth tube configured to fit tightly onto the left exhaust tube145A. Preferably, but not necessarily, and as depicted, the right exhaust filter150B comprises a cloth tube configured to fit tightly onto the right exhaust tube145B.

The left exhaust tube145A further comprises a left exhaust tube exhaust end151A that is close to the left exhaust valve138A, the exhaust emerging from the left exhaust tube145A at the left exhaust tube exhaust end151A. The right exhaust tube145B further comprises a right exhaust tube exhaust end151B that is close to the right exhaust valve138B, the exhaust emerging from the right exhaust tube145A at the right exhaust tube exhaust end151B. The left exhaust tube exhaust end151A is located at a left valve to end distance152A from the left exhaust valve138A. The right exhaust tube exhaust end151B is located at a right valve to end distance152B from the right exhaust valve138B.

For example, the left valve to end distance152A of the left exhaust valve138A from the left exhaust tube exhaust end151A comprising the left exhaust tube145A is approximately three-eighths of an inch (⅜ inches). Alternatively, or additionally, the left valve to end distance152A equals zero.

For example, the right valve to end distance152B of the right exhaust valve138B from the right exhaust tube exhaust end151B comprising the right exhaust tube145B is approximately three-eighths of an inch (⅜ inches). Alternatively, or additionally, the right valve to end distance152B equals zero.

The left exhaust filter150A is attached to the left exhaust tube145A near the left exhaust tube exhaust end151A. The right exhaust filter150B is attached to the right exhaust tube145A near the right exhaust tube exhaust end151B.

The left exhaust tube145A further comprises a left exhaust tube base end153A that is close to the mask base108. The right exhaust tube145B further comprises a right exhaust tube base end153B that is close to the mask base108.

Preferably, but not necessarily, and as depicted, the left exhaust filter150A comprises a left exhaust filter fastener155A configured to fasten the left exhaust filter150A onto the left exhaust tube145A. Preferably, but not necessarily, and as depicted, the right exhaust filter150B comprises a right exhaust filter fastener155B configured to fasten the right exhaust filter150B onto the right exhaust tube145B. Preferably, but not necessarily, and as depicted, the left exhaust filter fastener150A holds the left exhaust tube145A against the mask base108. Preferably, but not necessarily, and as depicted, the left exhaust filter fastener155A comprises an elastic band. For example, and as depicted, the left exhaust filter fastener155A comprises an elastic band155A circling a circumference of the left exhaust tube150A near an end of the left exhaust tube150A. For example, the left exhaust filter fastener155A comprises a rubber band. Preferably, but not necessarily, and as depicted, the right exhaust filter fastener155B holds the right exhaust tube145B against the mask base108. Preferably, but not necessarily, and as depicted, the right exhaust filter fastener155B comprises an elastic band. For example, and as depicted, the right exhaust filter fastener155B comprises an elastic band155B circling a circumference of the right exhaust tube150B near an end of the right exhaust tube150B. For example, the right exhaust filter fastener155B comprises a rubber band.

The mask base108further comprises a left base exhaust hole158A configured to allow the left exhaust tube145A to pass through from the inside101of the mask100to the outside128of the mask100. For example, the left base exhaust hole158A comprises an opening slightly larger than a diameter of the left exhaust tube145A. The mask base108further comprises a right base exhaust hole158B configured to allow the right exhaust tube145B to pass through from the inside101of the mask100to the outside128of the mask100. For example, the right base exhaust hole158B comprises an opening slightly larger than a diameter of the right exhaust tube145B.

The mask base108further comprises one or more of a left base anchor159A located on the left side105A of the mask100and a right base anchor159B located on the right side105B of the mask. Preferably, but not necessarily, and as depicted, the mask base108comprises both the left base anchor159A and the right base anchor159B. At least one of the left base anchor159A and the right base anchor159B is configured to hold the mask base108in place on the mask100. Preferably, but not necessarily, the left base anchor159A and the right base anchor159B are both configured to hold the mask base108in place on the mask100. For example, the left base anchor159A comprises one or more of a fastener, a rivet, and a staple. As depicted, the left base anchor159A comprises a staple. For example, the right base anchor159B comprises one or more of a fastener, a rivet, and a staple. As depicted, the right base anchor159B comprises a staple.

The mask100further comprises a mask cover178configured to cover the outside128of the mask100. The mask cover178is attached to the mask base108. Preferably, but not necessarily, and as depicted, the mask base108is stapled to the mask cover178. Alternatively, or additionally, the mask base108is attached to the mask cover178using one or more of a rivet, glue, and tape.

The mask cover178comprises one or more of a left strap179A and a right strap179B. Preferably, but not necessarily, and as depicted, the mask cover178comprises both the left strap179A and the right strap179B. The left strap179A comprises a left strap connector180A. The right strap179B comprises a right strap connector180B. The left strap connector180A and the right strap connector180B are connectable to hold the mask100on the user's face (not shown). One or more of the left strap connector180A and the right strap connector180B comprises a connector configured to connect the left strap179A to the right strap179B while the user (not shown) is wearing the mask. For example, one or more of the left strap connector180A and the right strap connector180B comprise Velcro usable to connect the left strap179A and the right strap179B. Preferably, but not necessarily, and as depicted, both the left strap connector180A and the right strap connector180B comprise Velcro usable to connect the left strap179A and the right strap179B.

The mask cover178further comprises an intake filter181configured to filter the user's intake breath through the intake valve panel120. As depicted, the intake filter181is attached to the intake valve panel120. As depicted, the intake filter181is positioned adjacent to and outside of the intake valve panel120. For example, the mask cover178comprises an intake filter slot182configured to hold the intake filter181. Preferably, but not necessarily, and as depicted, the intake filter181slides in front of the intake valve panel120so as to filter the user's intake breath. The intake filter181may be one or more of disposable and washable. For example, an intake filter181comprising four intake valves123A-123D has approximate dimensions of 2″×2.″ Dimensions of the intake valve panel120may vary according to one or more of a size of the mask100and a number of intake valves123A-123D in the intake valve panel120. The intake filter181can comprise multiple filtration materials such as one or more of a disposable filter of any kind and a copper mesh. The copper mesh may provide more protection against one or more of viruses and bacteria.

The mask cover178further comprises an intake filter slot182configured to receive the intake filter181, the intake filter slot182further configured to hold the intake filter181firmly in place.

The mask base108further comprises an optional intake valve spacer (not shown). The intake valve spacer (not shown) prevents the intake filter181from contacting the intake valves120, making the intake filter181easier to install.

The mask cover178further comprises an intake hole183configured to allow the user's intake breath (not shown) to pass from the outside128of the mask100to the intake valve panel120and then through the intake filters123A-123D to the inside101of the mask100. The mask cover178further comprises a left cover exhaust hole184A configured to allow the left exhaust tube145A to pass through from the inside101of the mask100to an outside128of the mask100. For example, the left cover exhaust hole184A comprises an opening slightly larger than a diameter of the left exhaust tube145A. The mask cover178further comprises a right cover exhaust hole184B configured to allow the right exhaust tube145B to pass through from the inside101of the mask100to the outside128of the mask100. For example, the right cover exhaust hole184B comprises an opening slightly larger than a diameter of the right exhaust tube145B.

The mask100further comprises a soft foam lining186configured to comfortably hold the mask100against the user's face (not shown). The soft foam lining186is attached to the mask base108. For example, the soft foam lining186is attached to the mask base108using one or more of tape and glue.

The mask100further comprises a hard foam lining187attached to the mask100, the hard foam lining187attached to the soft foam lining186. The hard foam lining187is configured to hold the intake valve panel120at a distance from the user's face (not shown), thereby allowing the intake valves123A-123D to open and close freely. Preferably, but not necessarily, and as depicted, the hard foam lining187surrounds the soft foam lining186. The hard foam lining187is attached to the base108on an opposite side of the hard foam lining187from where the hard foam lining187attaches to the soft foam lining186. For example, the hard foam lining187is attached to the mask base108using one or more of tape and glue. For example, the hard foam lining187is attached to the soft foam lining186using one or more of tape and glue.

For example, the soft foam lining186comprises hypoallergenic foam. For example, the soft foam lining186comprises latex-free foam. For example, the soft foam lining186comprises latex-free, hypoallergenic foam. For example, the hard foam lining187comprises hypoallergenic foam. For example, the hard foam lining187comprises latex-free foam. For example, the hard foam lining187comprises latex-free, hypoallergenic foam.

FIG. 1Bis a drawing showing an assembled interior view of the dual filtration COVID-19 mask100. The mask100again comprises the mask left side105A, the mask right side105B (the “left side” and “right side” descriptors are as seen in the interior view shown inFIGS. 1A and 1nthis figure), and the mask center107.

The mask100again further comprises the mask base108. The mask base108again comprises the intake valve panel120. The intake valve panel120again comprises the one or more intake valve assemblies122A-122D.

At least one of the intake valve assemblies122A-122D again comprises a respective intake valve123A-123D, at least one of the one or more intake valves123A-123D again configured to open to transmit the user's intake breath. Preferably, but not necessarily, and as depicted, each of the one or more intake valves123A-123D again is configured to open to transmit the user's intake breath. The intake valves123A-123D are closed because the user again is not currently breathing an intake breath.

The intake valve panel120again further comprises one or more base intake holes127A-127D, wherein at least one of the base intake holes127A-127D again is configured snugly to hold a corresponding intake valve123A-123D while allowing the user's intake breath to pass from the outside128of the mask100to the inside101of the mask100. Preferably, but not necessarily, and as depicted, each of the base intake holes127A-127D is configured to snugly hold the corresponding intake valve123A-123D while allowing the user's intake breath to pass from the outside128of the mask100to the inside101of the mask100.

The intake valves123A-123D again are attached to the corresponding intake valve bases124A-124D by corresponding intake valve hinges126A-126D.

The mask base108again further comprises the left exhaust valve assembly131A and the right exhaust valve assembly131B.

The left exhaust valve assembly131A again comprises the left exhaust valve138A. The right exhaust valve assembly again comprises the right exhaust valve138B. One or more of the left exhaust valve138A and the right exhaust valve138B again are configured to open to transmit the user's exhale breath. Preferably, but not necessarily, and as depicted, both the left exhaust valve138A and the right exhaust valve138B again are configured to open to transmit the user's exhale breath. At least one of the one or more exhaust valves138A-138B again is configured to close promptly after transmission of the user's exhale breath. One or more of the left exhaust valve138A and the right exhaust valve138B again are configured to close promptly after transmission of the user's exhale breath. Preferably, but not necessarily, and as depicted, each of the exhaust valves138A-138B again is configured to close promptly after transmission of the user's exhale breath. The left exhaust valve138A and the right exhaust valve138B are closed because the user is not currently breathing an exhale breath. The exhaust valves138A-138B again are positioned at the respective exhaust-intake distances139A-139B from the intake valve panel120.

The left exhaust valve assembly131A again further comprises the left exhaust valve base140A and the left exhaust tube145A. The right exhaust valve assembly131B again comprises the right exhaust valve base140B and the right exhaust tube145B.

The left exhaust tube145A again comprises the left exhaust tube inner diameter146A, the right exhaust tube inner diameter146B, the left exhaust tube outer diameter147A, and the right exhaust tube outer diameter147B. Preferably, but not necessarily, and as depicted, the left exhaust valve diameter143A again is roughly equal to and very slightly less than the left exhaust tube inner diameter146A so that the left exhaust valve138A fits snugly inside the left exhaust tube145A. Accordingly, the left exhaust tube145A again allows the left exhaust valve138A to open and close freely while holding the left exhaust valve138A tightly. Preferably, but not necessarily, and as depicted, the right exhaust valve diameter143B again is roughly equal to and very slightly less than the right exhaust tube inner diameter146B so that the right exhaust valve138B fits snugly inside the right exhaust tube145B. Accordingly, the right exhaust tube145B again allows the right exhaust valve138B to open and close freely while holding the right exhaust valve138B tightly.

The left exhaust tube145A again further comprises the left exhaust filter150A the left exhaust filter150A again configured to filter a first portion of the user's exhale breath through the right exhaust tube145B. The right exhaust tube145B again further comprises the right exhaust filter150B the right exhaust filter150B again configured to filter a second portion of the user's exhale breath through the right exhaust tube145B.

The left exhaust tube145A again further comprises the left exhaust tube exhaust end151A that is close to the left exhaust valve138A. The right exhaust tube145B again further comprises the right exhaust tube exhaust end151B that is close to the right exhaust valve138B. The left exhaust tube exhaust end151A is again located at the left valve to end distance152A from the left exhaust valve138A. The right exhaust tube exhaust end151B is again located at the right valve to end distance152B from the right exhaust valve138B.

The left exhaust filter150A again is attached to the left exhaust tube145A near the left exhaust tube exhaust end151A. The right exhaust filter150B again is attached to the right exhaust tube145A near the right exhaust tube exhaust end151B.

The left exhaust tube145A again further comprises the left exhaust tube base end153A that is close to the mask base108. The right exhaust tube145B again further comprises the right exhaust tube base end153B that is close to the mask base108.

Preferably, but not necessarily, and as depicted, the left exhaust filter150A again comprises the left exhaust filter fastener155A configured to fasten the left exhaust filter150A onto the left exhaust tube145A. Preferably, but not necessarily, and as depicted, the right exhaust filter150B again comprises the right exhaust filter fastener155B configured to fasten the right exhaust filter150B onto the right exhaust tube145B.

The mask100again further comprises the mask cover178, the mask cover178again configured to cover the outside128of the mask100. The mask cover178is again attached to the mask base108.

The mask cover178again comprises one or more of the left strap179A and the right strap179B. Preferably, but not necessarily, and as depicted, the mask cover178again comprises both the left strap179A and the right strap179B. The left strap179A again comprises the left strap connector180A. The right strap179B again comprises the right strap connector180B. The left strap connector180A and the right strap connector180B again are connectable to hold the mask100on the user's face (not shown).

The mask cover178again further comprises the intake filter181, which again is configured to filter the user's intake breath through the intake valve panel120.

The mask cover178again further comprises the intake hole183, which is again configured to allow the user's intake breath to pass from the outside128of the mask100to the intake valve panel120and then through the intake filters123A-123D to the inside101of the mask100.

The mask100again further comprises the soft foam lining186, which is again configured to comfortably hold the mask100against the user's face (not shown).

The mask100again further comprises the hard foam lining187, which again is attached to the soft foam lining186. The hard foam lining187again is configured to hold the intake valve panel120at a distance from the user's face (not shown), thereby allowing the intake valves123A-123D to open and close freely. Preferably, but not necessarily, and as depicted, the hard foam lining187again surrounds the soft foam lining186. The hard foam lining187is again attached to the base108.

FIG. 1Cis a drawing showing an assembled exterior view of the dual filtration COVID-19 mask100. The mask100again comprises the mask left side105A, the mask right side105B (the “left side” and “right side” descriptors are as seen in the interior view shown inFIGS. 1A-1B), and the mask center107.

The mask base108again further comprises the left exhaust valve assembly131A and the right exhaust valve assembly131B.

The left exhaust valve assembly131A again further comprises the left exhaust filter150A. The right exhaust valve assembly131B again further comprises the right exhaust filter150B.

The left exhaust valve assembly131A again further comprises the left exhaust filter150A and the right exhaust filter150B. Preferably, but not necessarily, and as depicted, the left exhaust filter150A again comprises the left exhaust filter fastener155A. Preferably, but not necessarily, and as depicted, the right exhaust filter150B again comprises the right exhaust filter fastener155B.

The mask100again further comprises the mask cover178, the mask cover178again configured to cover the outside128of the mask100. The mask cover178again comprises one or more of the left strap179A and the right strap179B. Preferably, but not necessarily, and as depicted, the mask cover178again comprises both the left strap179A and the right strap179B. The left strap179A again comprises the left strap connector180A. The right strap179B again comprises the right strap connector180B. The left strap connector180A and the right strap connector180B again are connectable to hold the mask100on the user's face (not shown).

The mask cover178again further comprises the intake filter181.

The mask100again further comprises the soft foam lining186, which is again configured to comfortably hold the mask100against the user's face (not shown).

The mask100again further comprises the hard foam lining187, which again is attached to the soft foam lining186. Preferably, but not necessarily, and as depicted, the hard foam lining187again surrounds the soft foam lining186. The hard foam lining187is again attached to the base108.

FIGS. 2A-2Care a set of three drawings of a dual filtration COVID-19 mask100configured to allow a user to breathe, showing the mask100prior to use.FIGS. 2A-2Cshow the mask100as it appears following the user's exhale breath and prior to the user's intake breath.

FIG. 2Ais a drawing showing an interior view of the dual filtration COVID-19 mask100as seen from an inside101of the mask100. The mask100is configured to allow the user (not shown) to breathe, showing the mask100prior to use.FIG. 2Adepicts the mask100as it appears following the user's exhale breath and prior to the user's next intake breath. The mask100(the “left side” and “right side” descriptors are as seen in the interior view shown inFIGS. 1A-1Band in this figure) again comprises the mask left side105A, the mask right side105B, and the mask center107.

The mask100again further comprises the mask base108. The mask base108again comprises the intake valve panel120. The intake valve panel120again comprises the one or more intake valve assemblies122A-122D.

At least one of the intake valve assemblies122A-122D again comprises a respective intake valve123A-123D, at least one of the one or more intake valves123A-123D again configured to open to transmit the user's intake breath. Preferably, but not necessarily, and as depicted, each of the one or more intake valves123A-123D is again configured to open to transmit the user's intake breath. The intake valves123A-123D are closed because the user is not currently breathing an intake breath.

The intake valve panel120again further comprises one or more base intake holes127A-127D, wherein at least one of the base intake holes127A-127D again is configured snugly to hold a corresponding intake valve123A-123D while allowing the user's intake breath to pass from the outside128of the mask100to the inside101of the mask100. Preferably, but not necessarily, and as depicted, each of the base intake holes127A-127D is configured to snugly hold the corresponding intake valve123A-123D while allowing the user's intake breath to pass from the outside128of the mask100to the inside101of the mask100.

The mask base108again further comprises the left exhaust valve assembly131A and the right exhaust valve assembly131B the left base anchor159A, and the right base anchor159B.

The left exhaust valve assembly131A again comprises the left exhaust valve138A. The right exhaust valve assembly again comprises the right exhaust valve138B. One or more of the left exhaust valve138A and the right exhaust valve138B again are configured to open to transmit the user's exhale breath. Preferably, but not necessarily, and as depicted, both the left exhaust valve138A and the right exhaust valve138B again are configured to open to transmit the user's exhale breath. At least one of the one or more exhaust valves138A-138B again is configured to close promptly after transmission of the user's exhale breath. One or more of the left exhaust valve138A and the right exhaust valve138B again are configured to close promptly after transmission of the user's exhale breath. Preferably, but not necessarily, and as depicted, each of the exhaust valves138A-138B again is configured to close promptly after transmission of the user's exhale breath. The left exhaust valve138A and the right exhaust valve138B are closed because the user is not currently breathing an exhale breath. The exhaust valves138A-138B again are positioned at the respective exhaust-intake distances139A-139B from the intake valve panel120.

The left exhaust valve assembly131A again further comprises the left exhaust valve base140A and the left exhaust tube145A. The right exhaust valve assembly131B again comprises the right exhaust valve base140B and the right exhaust tube145B.

The left exhaust tube145A again further comprises the left exhaust filter150A the left exhaust filter150A again configured to filter a first portion of the user's exhale breath through the right exhaust tube145B. The right exhaust tube145B again further comprises the right exhaust filter150B the right exhaust filter150B again configured to filter e second portion of the user's exhale breath through the right exhaust tube145B.

The left exhaust tube145A again further comprises the left exhaust tube exhaust end151A that is close to the left exhaust valve138A. The right exhaust tube145B again further comprises the right exhaust tube exhaust end151B that is close to the right exhaust valve138B.

The left exhaust filter150A again is attached to the left exhaust tube145A near the left exhaust tube exhaust end151A. The right exhaust filter150B again is attached to the right exhaust tube145A near the right exhaust tube exhaust end151B.

The left exhaust tube145A again further comprises the left exhaust tube base end153A that is close to the mask base108. The right exhaust tube145B again further comprises the right exhaust tube base end153B that is close to the mask base108.

Preferably, but not necessarily, and as depicted, the left exhaust filter150A again comprises the left exhaust filter fastener155A configured to fasten the left exhaust filter150A onto the left exhaust tube145A. Preferably, but not necessarily, and as depicted, the right exhaust filter150B again comprises the right exhaust filter fastener155B configured to fasten the right exhaust filter150B onto the right exhaust tube145B.

The mask100again further comprises the mask cover178, the mask cover178again configured to cover the outside128of the mask100. The mask cover178is again attached to the mask base108.

The mask cover178again comprises one or more of the left strap179A and the right strap179B. Preferably, but not necessarily, and as depicted, the mask cover178again comprises both the left strap179A and the right strap179B. The left strap179A again comprises the left strap connector180A. The right strap179B again comprises the right strap connector180B. The left strap connector180A and the right strap connector180B again are connectable to hold the mask100on the user's face (not shown).

The mask cover178again further comprises the intake filter181, which again is configured to filter the user's intake breath through the intake valve panel120.

The mask cover178again further comprises the intake hole183, which is again configured to allow the user's intake breath to pass from the outside128of the mask100to the intake valve panel120and then through the intake filters123A-123D to the inside101of the mask100.

The mask100again further comprises the soft foam lining186, which is again configured to comfortably hold the mask100against the user's face (not shown).

The mask100again further comprises the hard foam lining187, which again is attached to the soft foam lining186. The hard foam lining187again is configured to hold the intake valve panel120at a distance from the user's face (not shown), thereby allowing the intake valves123A-123D to open and close freely. Preferably, but not necessarily, and as depicted, the hard foam lining187again surrounds the soft foam lining186. The hard foam lining187is again attached to the base108.

Components of the mask100that are not visible inFIG. 2Ainclude the intake valve bases (items124A-124D inFIG. 1A), the base intake holes (items125A-125D inFIG. 1A), the intake valve hinges (items126A-126D inFIGS. 1A, 2B, 2D, 3B, 4B, 5F, and5H), the left exhaust valve hinge (item142A inFIGS. 1A, 1B, 2C, 3C, 4C, and 5E-5H), the right exhaust valve hinge (item142B inFIGS. 1A, 1B, 2C, 3C, 4C, and 5E-5H), the left exhaust valve diameter and the right exhaust valve diameter (items143A and143B inFIG. 1A), the left exhaust tube and the right exhaust tube (items145A and145B inFIGS. 1A, 1B, 2C, 3C, 4C, and 5F-5H), the left exhaust tube inner diameter and the right exhaust tube inner diameter (items146A and146B inFIGS. 1A and 1B), the left exhaust tube outer diameter and the right exhaust tube outer diameter (items147A and147B inFIGS. 1A and 1B), the left valve to end distance and the right valve to end distance (items152A and152B inFIGS. 1A and 1B), the left exhaust filter fastener (item155A inFIGS. 1A, 1B, 2B, 3B, and 4B), the right exhaust filter fastener (item155B inFIGS. 1A and 1B; also not shown inFIGS. 2B, 3B, and 4B), the left base exhaust hole and the right base exhaust hole (items158A-158B inFIGS. 1A, 2C, 3C, 4C, and 5B-5H), the intake filter slot (item182inFIGS. 1A, 2B, 3B, and 4B), the intake hole (item183inFIGS. 1A and 1B), and the left cover exhaust hole and the right cover exhaust hole (items184A and184B inFIG. 1A).

FIG. 2Bis a drawing showing a left side cross section view of a front portion of the mask100configured to allow the user (not shown) to breathe, showing the mask100prior to use.FIG. 2Balso depicts the mask100as it appears following the user's exhale breath and prior to the user's next intake breath.

The mask100again comprises the mask base108. The mask base108again comprises the intake valve panel120. The intake valve panel120again comprises the one or more intake valve assemblies122A-122D.

At least one of the intake valve assemblies122A-122D again comprises a respective intake valve123A-123D, at least one of the one or more intake valves123A-123D again configured to open to transmit the user's intake breath from the outside128of the mask100to the inside101of the mask100. Preferably, but not necessarily, and as depicted, each of the one or more intake valves123A-123D again is configured to open to transmit the user's intake breath. The intake valves123A-123D are closed because the user is not currently breathing an intake breath. The intake valves123A-123D again are attached to the corresponding intake valve bases124A-124D by corresponding intake valve hinges126A-126D.

The intake valves123A-123D again are attached to the corresponding intake valve bases124A-124D by corresponding intake valve hinges126A-126D.

The mask base108again further comprises the left exhaust valve assembly131A and the right exhaust valve assembly131B.

The mask cover178again further comprises the intake filter181, which again is configured to filter the user's intake breath through the intake valve panel120.

The mask100again further comprises the soft foam lining186, which is again configured to comfortably hold the mask100against the user's face (not shown).

The mask100again further comprises the hard foam lining187, which again is attached to the soft foam lining186. The hard foam lining187again is configured to hold the intake valve panel120at a distance from the user's face (not shown), thereby allowing the intake valves123A-123D to open and close freely. Preferably, but not necessarily, and as depicted, the hard foam lining187again surrounds the soft foam lining186. The hard foam lining187is again attached to the base108.

The mask100further comprises an intake filter slot182configured to receive the intake filter181, the intake filter slot182further configured to hold the intake filter181firmly in place.

FIG. 2Cis a drawing showing an interior view of a left portion of the mask100configured to allow the user (not shown) to breathe, showing the mask100prior to use.

The mask100again further comprises the mask base108.

The mask base108again comprises the left exhaust valve assembly131A. The left exhaust valve assembly131A again comprises the left exhaust valve138A. The left exhaust valve138A again is configured to open to transmit the user's exhale breath. The left exhaust valve138A again is configured to close promptly after transmission of the user's exhale breath. The left exhaust valve138A is closed because the user is not currently breathing an exhale breath.

The left exhaust valve assembly131A again further comprises the left exhaust valve base140A, the left exhaust valve hinge142A, and the left exhaust tube145A.

The left exhaust tube145A again further comprises the left exhaust filter150A.

The left exhaust tube145A again further comprises the left exhaust tube exhaust end151A that is close to the left exhaust valve138A. The left exhaust tube exhaust end151A is again located at the left valve to end distance152A from the left exhaust valve138A.

The left exhaust filter150A again is attached to the left exhaust tube145A near the left exhaust tube exhaust end151A.

The left exhaust tube145A again further comprises the left exhaust tube base end153A that is close to the mask base108.

Preferably, but not necessarily, and as depicted, the left exhaust filter150A again comprises the left exhaust filter fastener155A configured to fasten the left exhaust filter150A onto the left exhaust tube145A.

The mask100again further comprises the mask cover178, the mask cover178again configured to cover the outside128of the mask100. The mask cover178is again attached to the mask base108.

The mask cover178again comprises the left strap179A. The left strap179A again comprises the left strap connector180A.

FIGS. 3A-3Care a set of three drawings of a dual filtration COVID-19 mask100configured to allow a user to breathe, showing the mask100prior to use.FIGS. 3A-3Cshow the mask100as it appears during the user's intake breath.

FIG. 3Ais a drawing showing an interior view of the dual filtration COVID-19 mask100as seen from an inside101of the mask100. The mask100is configured to allow the user (not shown) to breathe, showing the mask100prior to use.FIG. 3Adepicts the mask100as it appears during the user's intake breath. The mask100(the “left side” and “right side” descriptors are as seen in the interior view shown inFIGS. 1A-1Band in this figure) again comprises the mask left side105A, the mask right side105B, and the mask center107.

The mask100again further comprises the mask base108. The mask base108again comprises the intake valve panel120. The intake valve panel120again comprises the one or more intake valve assemblies122A-122D.

At least one of the intake valve assemblies122A-122D again comprises a respective intake valve123A-123D, at least one of the one or more intake valves123A-123D again configured to open to transmit the user's intake breath. Preferably, but not necessarily, and as depicted, each of the one or more intake valves123A-123D is again configured to open to transmit the user's intake breath. The intake valves123A-123D are open because the user is currently breathing an intake breath.

The intake valve panel120again further comprises one or more base intake holes127A-127D, wherein at least one of the base intake holes127A-127D again is configured snugly to hold a corresponding intake valve123A-123D while allowing the user's intake breath to pass from the outside128of the mask100to the inside101of the mask100. Preferably, but not necessarily, and as depicted, each of the base intake holes127A-127D is configured to snugly hold the corresponding intake valve123A-123D while allowing the user's intake breath to pass from the outside128of the mask100to the inside101of the mask100.

The mask base108again further comprises the left exhaust valve assembly131A and the right exhaust valve assembly131B the left base anchor159A, and the right base anchor159B.

The left exhaust valve assembly131A again comprises the left exhaust valve138A. The right exhaust valve assembly again comprises the right exhaust valve138B. One or more of the left exhaust valve138A and the right exhaust valve138B again are configured to open to transmit the user's exhale breath. Preferably, but not necessarily, and as depicted, both the left exhaust valve138A and the right exhaust valve138B again are configured to open to transmit the user's exhale breath. At least one of the one or more exhaust valves138A-138B again is configured to close promptly after transmission of the user's exhale breath. One or more of the left exhaust valve138A and the right exhaust valve138B again are configured to close promptly after transmission of the user's exhale breath. Preferably, but not necessarily, and as depicted, each of the exhaust valves138A-138B again is configured to close promptly after transmission of the user's exhale breath. The left exhaust valve138A and the right exhaust valve138B are closed because the user is not currently breathing an exhale breath. The exhaust valves138A-138B again are positioned at the respective exhaust-intake distances139A-139B from the intake valve panel120.

The left exhaust valve assembly131A again further comprises the left exhaust valve base140A and the left exhaust tube145A. The right exhaust valve assembly131B again comprises the right exhaust valve base140B and the right exhaust tube145B.

The left exhaust tube145A again further comprises the left exhaust filter150A. The right exhaust tube145B again further comprises the right exhaust filter150B.

The left exhaust tube145A again further comprises the left exhaust filter150A the left exhaust filter150A again configured to filter a first portion of the user's exhale breath through the right exhaust tube145B. The right exhaust tube145B again further comprises the right exhaust filter150B the right exhaust filter150B again configured to filter a second portion of the user's exhale breath through the right exhaust tube145B.

The left exhaust tube145A again further comprises the left exhaust tube exhaust end151A that is close to the left exhaust valve138A. The right exhaust tube145B again further comprises the right exhaust tube exhaust end151B that is close to the right exhaust valve138B.

The left exhaust filter150A again is attached to the left exhaust tube145A near the left exhaust tube exhaust end151A. The right exhaust filter150B again is attached to the right exhaust tube145A near the right exhaust tube exhaust end151B.

The left exhaust tube145A again further comprises the left exhaust tube base end153A that is close to the mask base108. The right exhaust tube145B again further comprises the right exhaust tube base end153B that is close to the mask base108.

Preferably, but not necessarily, and as depicted, the left exhaust filter150A again comprises the left exhaust filter fastener155A configured to fasten the left exhaust filter150A onto the left exhaust tube145A. Preferably, but not necessarily, and as depicted, the right exhaust filter150B again comprises the right exhaust filter fastener155B configured to fasten the right exhaust filter150B onto the right exhaust tube145B.

The mask100again further comprises the mask cover178, the mask cover178again configured to cover the outside128of the mask100. The mask cover178is again attached to the mask base108.

The mask cover178again comprises one or more of the left strap179A and the right strap179B. Preferably, but not necessarily, and as depicted, the mask cover178again comprises both the left strap179A and the right strap179B. The left strap179A again comprises the left strap connector180A. The right strap179B again comprises the right strap connector180B. The left strap connector180A and the right strap connector180B again are connectable to hold the mask100on the user's face (not shown).

The mask cover178again further comprises the intake filter181, which again is configured to filter the user's intake breath through the intake valve panel120.

The mask cover178again further comprises the intake hole183, which is again configured to allow the user's intake breath to pass from the outside128of the mask100to the intake valve panel120and then through the intake filters123A-123D to the inside101of the mask100.

The mask100again further comprises the soft foam lining186, which is again configured to comfortably hold the mask100against the user's face (not shown).

The mask100again further comprises the hard foam lining187, which again is attached to the soft foam lining186. The hard foam lining187again is configured to hold the intake valve panel120at a distance from the user's face (not shown), thereby allowing the intake valves123A-123D to open and close freely. Preferably, but not necessarily, and as depicted, the hard foam lining187again surrounds the soft foam lining186. The hard foam lining187is again attached to the base.

Components of the mask100that are not visible inFIG. 3Ainclude the intake valve bases (items124A-124D inFIG. 1A), the base intake holes (items125A-125D inFIG. 1A), the intake valve hinges (items126A-126D inFIGS. 1A, 2B, 2D, 3B, 4B, 5F, and5H), the left exhaust valve hinge (item142A inFIGS. 1A, 1B, 2C, 3C, 4C, and 5E-5H), the right exhaust valve hinge (item142B inFIGS. 1A, 1B, 2C, 3C, 4C, and 5E-5H), the left exhaust valve diameter and the right exhaust valve diameter (items143A and143B inFIG. 1A), the left exhaust tube and the right exhaust tube (items145A and145B inFIGS. 1A, 1B, 2C, 3C, 4C, and 5F-5H), the left exhaust tube inner diameter and the right exhaust tube inner diameter (items146A and146B inFIGS. 1A and 1B), the left exhaust tube outer diameter and the right exhaust tube outer diameter (items147A and147B inFIGS. 1A and 1B), the left valve to end distance and the right valve to end distance (items152A and152B inFIGS. 1A and 1B), the left exhaust filter fastener (item155A inFIGS. 1A, 1B, 2B, 3B, and 4B), the right exhaust filter fastener (item155B inFIGS. 1A and 1B; also not shown inFIGS. 2B, 3B, and 4B), the left base exhaust hole and the right base exhaust hole (items158A-158B inFIGS. 1A, 2C, 3C, 4C, and 5B-5H), the intake filter slot (item182inFIGS. 1A, 2B, 3B, and 4B), the intake hole (item183inFIGS. 1A and 1B), and the left cover exhaust hole and the right cover exhaust hole (items184A and184B inFIG. 1A).

FIG. 3Bis a drawing showing a left side cross section view of a front portion of the mask100configured to allow the user (not shown) to breathe, showing the mask100prior to use.FIG. 3Bdepicts the mask100as it appears during the user's intake breath.

The mask100again comprises the mask base108. The mask base108again comprises the intake valve panel120. The intake valve panel120again comprises the one or more intake valve assemblies122A-122D.

At least one of the intake valve assemblies122A-122D again comprises a respective intake valve123A-123D, at least one of the one or more intake valves123A-123D again configured to open to transmit the user's intake breath from the outside128of the mask100to the inside101of the mask100. Preferably, but not necessarily, and as depicted, each of the one or more intake valves123A-123D again is configured to open to transmit the user's intake breath. The intake valves123A-123D are open because the user is currently breathing an intake breath.

The mask base108again further comprises the left exhaust valve assembly131A and the right exhaust valve assembly131B.

The mask cover178again further comprises the intake filter181, which again is configured to filter the user's intake breath through the intake valve panel120.

The mask100again further comprises the soft foam lining186, which is again configured to comfortably hold the mask100against the user's face (not shown).

The mask100again further comprises the hard foam lining187, which again is attached to the soft foam lining186. The hard foam lining187again is configured to hold the intake valve panel120at a distance from the user's face (not shown), thereby allowing the intake valves123A-123D to open and close freely. Preferably, but not necessarily, and as depicted, the hard foam lining187again surrounds the soft foam lining186. The hard foam lining187is again attached to the base108.

The mask100further comprises an intake filter slot182configured to receive the intake filter181, the intake filter slot182further configured to hold the intake filter181firmly in place.

FIG. 3Cis a drawing showing an interior view of a left portion of the mask100configured to allow the user (not shown) to breathe, showing the mask100during the user's intake breath.

The mask100again further comprises the mask base108.

The mask base108again comprises the left exhaust valve assembly131A. The left exhaust valve assembly131A again comprises the left exhaust valve138A. The left exhaust valve138A again is configured to open to transmit the user's exhale breath. The left exhaust valve138A again is configured to close promptly after transmission of the user's exhale breath. The left exhaust valve138A is closed because the user is not currently breathing an exhale breath.

The left exhaust valve assembly131A again further comprises the left exhaust valve base140A, the left exhaust valve hinge142A, and the left exhaust tube145A.

The left exhaust tube145A again further comprises the left exhaust filter150A.

The left exhaust tube145A again further comprises the left exhaust tube exhaust end151A that is close to the left exhaust valve138A. The left exhaust tube exhaust end151A is again located at the left valve to end distance152A from the left exhaust valve138A.

The left exhaust filter150A again is attached to the left exhaust tube145A near the left exhaust tube exhaust end151A.

The left exhaust tube145A again further comprises the left exhaust tube base end153A that is close to the mask base108.

Preferably, but not necessarily, and as depicted, the left exhaust filter150A again comprises the left exhaust filter fastener155A configured to fasten the left exhaust filter150A onto the left exhaust tube145A.

The mask100again further comprises the mask cover178, the mask cover178again configured to cover the outside128of the mask100. The mask cover178is again attached to the mask base108.

The mask cover178again comprises the left strap179A. The left strap179A again comprises the left strap connector180A.

FIGS. 4A-4Care a set of three drawings of a dual filtration COVID-19 mask100configured to allow a user to breathe, showing the mask100prior to use.FIGS. 4A-4Dshow the mask100as it appears during the user's exhale breath.

FIG. 4Ais a drawing showing an interior view of the dual filtration COVID-19 mask100as seen from an inside101of the mask100. The mask100is configured to allow the user (not shown) to breathe, showing the mask100prior to use.FIG. 4Adepicts the mask100as it appears during the user's exhale breath. The mask100(the “left side” and “right side” descriptors are as seen in the interior view shown inFIGS. 1A-1Band in this figure) again comprises the mask left side105A, the mask right side105B, and the mask center107.

The mask100again further comprises the mask base108. The mask base108again comprises the intake valve panel120. The intake valve panel120again comprises the one or more intake valve assemblies122A-122D.

At least one of the intake valve assemblies122A-122D again comprises a respective intake valve123A-123D, at least one of the one or more intake valves123A-123D again configured to open to transmit the user's intake breath. Preferably, but not necessarily, and as depicted, each of the one or more intake valves123A-123D is again configured to open to transmit the user's intake breath. The intake valves123A-123D are closed because the user is currently breathing an exhale breath.

The intake valve panel120again further comprises one or more base intake holes127A-127D, wherein at least one of the base intake holes127A-127D again is configured snugly to hold a corresponding intake valve123A-123D while allowing the user's intake breath to pass from the outside128of the mask100to the inside101of the mask100. Preferably, but not necessarily, and as depicted, each of the base intake holes127A-127D is configured to snugly hold the corresponding intake valve123A-123D while allowing the user's intake breath to pass from the outside128of the mask100to the inside101of the mask100.

The mask base108again further comprises the left exhaust valve assembly131A and the right exhaust valve assembly131B the left base anchor159A, and the right base anchor159B.

The left exhaust valve assembly131A again comprises the left exhaust valve138A. The right exhaust valve assembly again comprises the right exhaust valve138B. One or more of the left exhaust valve138A and the right exhaust valve138B again are configured to open to transmit the user's exhale breath. Preferably, but not necessarily, and as depicted, both the left exhaust valve138A and the right exhaust valve138B again are configured to open to transmit the user's exhale breath. At least one of the one or more exhaust valves138A-138B again is configured to close promptly after transmission of the user's exhale breath. One or more of the left exhaust valve138A and the right exhaust valve138B again are configured to close promptly after transmission of the user's exhale breath. Preferably, but not necessarily, and as depicted, each of the exhaust valves138A-138B again is configured to close promptly after transmission of the user's exhale breath. The left exhaust valve138A and the right exhaust valve138B are open because the user is currently breathing an exhale breath. The exhaust valves138A-138B again are positioned at the respective exhaust-intake distances139A-139B from the intake valve panel120.

The left exhaust valve assembly131A again further comprises the left exhaust valve base140A and the left exhaust tube145A. The right exhaust valve assembly131B again comprises the right exhaust valve base140B and the right exhaust tube145B.

The left exhaust tube145A again further comprises the left exhaust filter150A. The right exhaust tube145B again further comprises the right exhaust filter150B.

The left exhaust tube145A again further comprises the left exhaust filter150A the left exhaust filter150A again configured to filter a first portion of the user's exhale breath through the right exhaust tube145B. The right exhaust tube145B again further comprises the right exhaust filter150B the right exhaust filter150B again configured to filter a second portion of the user's exhale breath through the right exhaust tube145B.

The left exhaust tube145A again further comprises the left exhaust tube exhaust end151A that is close to the left exhaust valve138A. The right exhaust tube145B again further comprises the right exhaust tube exhaust end151B that is close to the right exhaust valve138B.

The left exhaust filter150A again is attached to the left exhaust tube145A near the left exhaust tube exhaust end151A. The right exhaust filter150B again is attached to the right exhaust tube145A near the right exhaust tube exhaust end151B.

The left exhaust tube145A again further comprises the left exhaust tube base end153A that is close to the mask base108. The right exhaust tube145B again further comprises the right exhaust tube base end153B that is close to the mask base108.

Preferably, but not necessarily, and as depicted, the left exhaust filter150A again comprises the left exhaust filter fastener155A configured to fasten the left exhaust filter150A onto the left exhaust tube145A. Preferably, but not necessarily, and as depicted, the right exhaust filter150B again comprises the right exhaust filter fastener155B configured to fasten the right exhaust filter150B onto the right exhaust tube145B.

The mask100again further comprises the mask cover178, the mask cover178again configured to cover the outside128of the mask100. The mask cover178is again attached to the mask base108.

The mask cover178again comprises one or more of the left strap179A and the right strap179B. Preferably, but not necessarily, and as depicted, the mask cover178again comprises both the left strap179A and the right strap179B. The left strap179A again comprises the left strap connector180A. The right strap179B again comprises the right strap connector180B. The left strap connector180A and the right strap connector180B again are connectable to hold the mask100on the user's face (not shown).

The mask cover178again further comprises the intake filter181, which again is configured to filter the user's intake breath through the intake valve panel120.

The mask cover178again further comprises the intake hole183, which is again configured to allow the user's intake breath to pass from the outside128of the mask100to the intake valve panel120and then through the intake filters123A-123D to the inside101of the mask100.

The mask100again further comprises the soft foam lining186, which is again configured to comfortably hold the mask100against the user's face (not shown).

The mask100again further comprises the hard foam lining187, which again is attached to the soft foam lining186. The hard foam lining187again is configured to hold the intake valve panel120at a distance from the user's face (not shown), thereby allowing the intake valves123A-123D to open and close freely. Preferably, but not necessarily, and as depicted, the hard foam lining187again surrounds the soft foam lining186. The hard foam lining187is again attached to the base.

Components of the mask100that are not visible inFIG. 4Ainclude the intake valve bases (items124A-124D inFIG. 1A), the base intake holes (items125A-125D inFIG. 1A), the intake valve hinges (items126A-126D inFIGS. 1A, 2B, 2D, 3B, 4B, 5F, and5H), the left exhaust valve hinge (item142A inFIGS. 1A, 1B, 2C, 3C, 4C, and 5E-5H), the right exhaust valve hinge (item142B inFIGS. 1A, 1B, 2C, 3C, 4C, and 5E-5H), the left exhaust valve diameter and the right exhaust valve diameter (items143A and143B inFIG. 1A), the left exhaust tube and the right exhaust tube (items145A and145B inFIGS. 1A, 1B, 2C, 3C, 4C, and 5F-5H), the left exhaust tube inner diameter and the right exhaust tube inner diameter (items146A and146B inFIGS. 1A and 1B), the left exhaust tube outer diameter and the right exhaust tube outer diameter (items147A and147B inFIGS. 1A and 1B), the left valve to end distance and the right valve to end distance (items152A and152B inFIGS. 1A and 1B), the left exhaust filter fastener (item155A inFIGS. 1A, 1B, 2B, 3B, and 4B), the right exhaust filter fastener (item155B inFIGS. 1A and 1B; also not shown inFIGS. 2B, 3B, and 4B), the left base exhaust hole and the right base exhaust hole (items158A-158B inFIGS. 1A, 2C, 3C, 4C, and 5B-5H), the intake filter slot (item182inFIGS. 1A, 2B, 3B, and 4B), the intake hole (item183inFIGS. 1A and 1B), and the left cover exhaust hole and the right cover exhaust hole (items184A and184B inFIG. 1A).

FIG. 4Bis a drawing showing a left side cross section view of a front portion of the mask100configured to allow the user (not shown) to breathe, showing the mask100prior to use.FIG. 4Bdepicts the mask100as it appears during the user's exhale breath.

The mask100again comprises the mask base108. The mask base108again comprises the intake valve panel120. The intake valve panel120again comprises the one or more intake valve assemblies122A-122D.

At least one of the intake valve assemblies122A-122D again comprises a respective intake valve123A-123D, at least one of the one or more intake valves123A-123D again configured to open to transmit the user's intake breath from the outside128of the mask100to the inside101of the mask100. Preferably, but not necessarily, and as depicted, each of the one or more intake valves123A-123D again is configured to open to transmit the user's intake breath. The intake valves123A-123D are open because the user is currently breathing an intake breath.

The mask base108again further comprises the left exhaust valve assembly131A and the right exhaust valve assembly131B.

The mask cover178again further comprises the intake filter181, which again is configured to filter the user's intake breath through the intake valve panel120.

The mask100again further comprises the soft foam lining186, which is again configured to comfortably hold the mask100against the user's face (not shown).

The mask100again further comprises the hard foam lining187, which again is attached to the soft foam lining186. The hard foam lining187again is configured to hold the intake valve panel120at a distance from the user's face (not shown), thereby allowing the intake valves123A-123D to open and close freely. Preferably, but not necessarily, and as depicted, the hard foam lining187again surrounds the soft foam lining186. The hard foam lining187is again attached to the base108.

The mask100further comprises an intake filter slot182configured to receive the intake filter181, the intake filter slot182further configured to hold the intake filter181firmly in place.

FIG. 4Cis a drawing showing an interior view of a left portion of the mask100configured to allow the user (not shown) to breathe, showing the mask100during the user's exhale breath.

The mask100again further comprises the mask base108.

The mask base108again comprises the left exhaust valve assembly131A. The left exhaust valve assembly131A again comprises the left exhaust valve138A. The left exhaust valve138A again is configured to open to transmit the user's exhale breath. The left exhaust valve138A again is configured to close promptly after transmission of the user's exhale breath. The left exhaust valve138A is open because the user is currently breathing an exhale breath.

The left exhaust valve assembly131A again further comprises the left exhaust valve base140A, the left exhaust valve hinge142A, and the left exhaust tube145A.

The left exhaust tube145A again further comprises the left exhaust filter150A.

The left exhaust tube145A again further comprises the left exhaust tube exhaust end151A that is close to the left exhaust valve138A. The left exhaust tube exhaust end151A is again located at the left valve to end distance152A from the left exhaust valve138A.

The left exhaust filter150A again is attached to the left exhaust tube145A near the left exhaust tube exhaust end151A.

The left exhaust tube145A again further comprises the left exhaust tube base end153A that is close to the mask base108.

Preferably, but not necessarily, and as depicted, the left exhaust filter150A again comprises the left exhaust filter fastener155A configured to fasten the left exhaust filter150A onto the left exhaust tube145A.

The mask100again further comprises the mask cover178, the mask cover178again configured to cover the outside128of the mask100. The mask cover178is again attached to the mask base108.

The mask cover178again comprises the left strap179A. The left strap179A again comprises the left strap connector180A.

For example, the mask100again further comprises the base (not shown inFIGS. 2A, 3A, and 4A; item108inFIG. 1B) attached to the hard foam lining, the base (not shown inFIGS. 2A, 3A, and 4A; item108inFIG. 1B) configured to hold one or more of the intake valve panel120, the intake filter181, the left exhaust valve138A, and the right exhaust valve138B. Preferably, but not necessarily, and as depicted, the base (not shown inFIGS. 2A, 3A, and 4A; item108inFIG. 1B) is configured to hold each of the intake valve panel120, the left exhaust valve138A, and the right exhaust valve138B.

FIGS. 5A-5Hare a set of eight drawings showing an exemplary method for construction of a cardboard mask base usable in the dual filtration COVID-19 mask configured to allow a user to breathe.

the cardboard base may be constructed by cutting in the base a pair of slices having a length of approximately one inch, and subsequently, by pulling two sides of the mask base together, thereby creating a three-dimensional, domed base. The dome of the mask accommodates a user's mouth. Then one or more of a hard foam lining and a soft foam lining is attached around edges of an inner side of the base. The one or more of the hard foam lining and the soft foam lining helps to keep the mask at a distance from a user's face and more specifically, at a distance from lips of the user so that the intake valves are held at a distance from the user's lips.

InFIG. 5A, a cardboard mask base108is cut out of a larger piece of cardboard (not shown).

InFIG. 5B, a pair of slits510A-510B are cut in the cardboard mask base108. Four base intake holes127A-127D are cut in the cardboard mask base108. A left base exhaust hole158A and a right base exhaust hole158B are cut in the cardboard mask base108.

InFIG. 5C, the pair of slits510A-510B are bent towards each other, bending the cardboard mask base108so as to create a three-dimensional mask base108, bringing together a mask base top left section515A and a mask base top right section515B. The mask base108again further comprises the base intake holes127A-127D and the base exhaust holes158A-158B.

InFIG. 5D, a three-dimensional cardboard mask base108is created by further bending the slits510A-510B towards each other, finishing the process of bringing together the mask base top left section515A and the mask base top right section515B. The mask base top left section515A is fastened to the mask base top right section515B. For example, the mask base top left section515A and the mask base top right section515B are stapled together using a first base staple520A and a second base staple520B. The three-dimensional cardboard mask base108takes on a cup-like shape configured generally to match contours of a user's face (not shown). The mask base108again further comprises the base intake holes127A-127D and the base exhaust holes158A-158B.

InFIG. 5E, the base108again further comprises the intake valve assemblies122A-122D. The intake valve assemblies122A-122D again comprise the intake valves123A-123D, which again are attached to the corresponding intake valve bases124A-124D by corresponding intake valve hinges126A-126D. The intake valve assemblies122A-122D again are installed in the respective base intake holes127A-127D. The base108again further comprises the base exhaust holes158A-158B, the slits510A-510B, the mask base top sections515A-515B, and the base staples520A-520B.

InFIG. 5F, the base108further comprises the exhaust valve assemblies131A-131B. The exhaust valve assemblies131A-131B again comprise the exhaust valves138A-138B, which again are attached to the corresponding exhaust valve bases140A-140B by the corresponding exhaust valve hinges142A-142B. The exhaust valve assemblies131A-131B again further comprise the respective exhaust tubes145A-145B. The respective exhaust tubes145A-145B again comprise the respective exhaust valves140A-140B. The left exhaust tube145A is depicted being installed in the left base exhaust hole158A and fastened in place using a left exhaust staple530A. The intake valve assemblies122A-122D again comprise the intake valves123A-123D, which again are attached to the corresponding intake valve bases124A-124D by the corresponding intake valve hinges126A-126D. The intake valve assemblies122A-122D again are installed in the respective base intake holes127A-127D. The base108again further comprises the base exhaust holes158A-158B (the left base exhaust hole158A is mentioned above), the base slits510A-510B, the mask base top sections515A-515B, and the base staples520A-520B.

InFIG. 5G, an exterior view of the completed mask base108is shown. The mask base108again comprises the intake valve assemblies122A-122D, the intake valves123A-123D, the intake valve bases124A-124D (these numbers are missing on the drawings), the intake valve hinges126A-126D, the base intake holes127A-127D, the exhaust valve assemblies131A-131B, the exhaust valves138A-138B, the exhaust valve bases140A-140B, the exhaust tubes145A-145B, the base exhaust holes158A-158B, the base slits510A-510B, the mask base top sections515A-515B, the base staples520A-520B, the left exhaust staple530A, and a right exhaust staple530B.

InFIG. 5H, an interior view of the completed mask base108is shown. The mask base108again comprises the intake valve assemblies122A-122D, the intake valves123A-123D, the intake valve bases124A-124D (these numbers are missing on the drawings), the intake valve hinges126A-126D, the base intake holes127A-127D, the exhaust valve assemblies131A-131B, the left exhaust valves138A, the left exhaust valve base140A, the exhaust tubes145A-145B, the base exhaust holes158A-158B, the base slits510A-510B, the mask base top sections515A-515B, the base staples520A-520B, the left exhaust staple530A, and the right exhaust staple530B.

An additional advantage of embodiments of the invention is that the mask enables a user to avoid breathing his own exhaust. A further advantage of embodiments of the invention is that the exhaust valves are positioned a relatively long distance from the intake valve panel comprising the intake valves, so as to prevent the user from inadvertently breathing on the intake breath a substantial amount of air that has been exhaled on a prior exhale breath. Another advantage offered by embodiments of the invention is that the user will be breathing fresh air on each breath. A still further advantage of embodiments of the invention is enabling the user to avoid steaming up the user's eyeglasses. A still other advantage provided by embodiments of the invention is that construction of the mask, including but not limited to the soft foam lining and separation of the exhaust valves from the intake valves, does one or more of preventing unfiltered air from entering the mask and sealing the mask tightly. An additional advantage of embodiments of the invention is that the construction of the mask, including but not limited to the soft foam lining and separation of the exhaust valves from the intake valves, ensured that a user will breathe only filtered air.

An advantage of embodiments of the invention is that the invention protects one or more of the user and others from one or more of COVID-19 and another disease by filtering the user's intake breath to do one or more of provide protection from respiratory disease pathogens and remove respiratory disease pathogens. A still other advantage of embodiments of the invention is the square intake filter located in the approximate center of the mask that prevents one or more of the user and others from being infected by COVID-19.

Another advantage of embodiments of the invention is that the mask base enables adjustment of the mask according to contours of a particular user's face. A further advantage of embodiments of the invention is that the mask base can be form fit to match contours of the user's face. For example, a size of the base can vary depending on whether the user is a child or an adult and depending on a size of the user's face. A further advantage of embodiments of the invention is that the one or more of the soft foam lining and the hard foam lining can be contoured to match contours of a user's face, providing an ideal, tight fit.

Moreover, another advantage of embodiments of the invention is that the soft foam lining is configured to tightly hold the mask against the user's face, creating an ideal, snug, comfortable fit. A yet further advantage of embodiments of the invention is that the snug, comfortable fit against the user's face permits substantially no fogging of a user's eyeglasses. Another advantage of embodiments of the invention is that a size of the one or more of the soft foam lining and the hard foam lining can be varied according to a size of the intake valves. A still other advantage of embodiments of the invention is the flexibility in sizing of the mask base, the soft foam lining, the hard foam lining, and the mask facilitates identifying embodiments of the invention having an ideal size for any particular user. A yet further advantage of embodiments of the invention is that the one or more of the soft foam lining and the hard foam lining provides comfort of fit for the user, particularly in environments that are one or more of hot and humid.

A further advantage of embodiments of the invention is that disposable models of the invention comprise a cardboard mask base. A yet other advantage of embodiments of the invention is that models of the invention usable to participate in sports comprise a more durable, and more hypoallergenic, heavy duty plastic mask base.

A yet other advantage of embodiments of the invention is that one or more of the base, the soft foam lining and the hard foam lining, all of which are hypoallergenic in preferred embodiments, helps protect the user from contact dermatitis, including contact dermatitis with extended wear of the mask. A still further advantage of embodiments of the invention is that one or more of the soft foam lining and the hard foam lining promote comfort of fit for the user, particularly in environments that are one or more of hot and humid. An additional advantage of embodiments of the invention is that the layered design comprising one or more of the hard foam lining and the soft foam lining, and preferably comprising both the hard foam lining and the soft foam lining permits lips of a user to not contact an interior surface of the mask.

A further advantage of embodiments of the invention is that one or more of the mask base and the intake valve panel substantially eliminate inward leakage of particles into a breathing zone across an interface of the device and a face of the user. A yet other advantage of embodiments of the invention is that one or more of the mask base and the intake valve panel promote optimum filtration efficiency. Another advantage of embodiments of the invention is that one or more of the mask base and the intake valve panel minimize inhalation airflow resistance.

A further advantage of embodiments of the invention is avoiding use of flimsy diaphragms as is common in the prior art.

A still other advantage of embodiments of the invention is that the use of check valves comprising a return spring allows users to recline while using the mask and breathing.

A still further advantage of embodiments of the invention is that the exhaust filter avoids spreading diseases. A yet other advantage of embodiments of the invention is that air can exit the filter without being slowed down. Another advantage of embodiments of the invention is that a user can read for an extended period of time such as, for example, approximately 45 minutes, with the mask in place without the user's eyeglasses steaming up.

An additional advantage of embodiments of the invention is a sturdier construction compared to the prior art. A still further advantage of embodiments of the invention is that the mask, partly because it comprises a sliding intake filter, has the ability to be used in conjunction with medical devices such as oxygen tanks. Another advantage of embodiments of the invention is a user can continue to wear oxygen tubing that slides into the front of the mask, while wearing the mask.

A further advantage of embodiments of the invention is that the mask comprises the intake valve panel positioned at the approximate mask center and the left and right exhaust valves respectively positioned on the left and right sides of the mask, so that the mask ensures that the user is not breathing the user's own exhaust. An additional advantage of embodiments of the invention is that the mask has high separation of the intake valves from the exhaust valves, ensuring that the user has substantially no carbon dioxide intake. A yet other advantage of embodiments of the invention, partially due to this same feature of separation of the intake valves from the exhaust valves, the user can use the mask without fogging the user's eyeglasses.

Another advantage of embodiments of the invention is that the mask can be sterilized on a daily basis, allowing a user to wake up with a fresh and sterile filtration system ready to go.

A still other advantage of embodiments of the invention is that the exhaust tubes comprise one or more of transparent material and translucent material, allowing ultraviolet light to sanitize all parts of the mask.

A still further advantage of embodiments of the invention is that the mask is usable by one or more of painters, cleaners, and construction workers seeking to avoid one or more of dust from construction sites and toxic fiberglass dust.

While the above representative embodiments have been described with certain components in exemplary configurations, it will be understood by one of ordinary skill in the art that other representative embodiments can be implemented using different configurations and/or different components. For example, it will be understood by one of ordinary skill in the art that the order of certain steps and certain components can be altered without substantially impairing the functioning of the invention. It will be further understood by those of skill in the art that the number of variations of embodiments of the invention are virtually limitless.

For example, a bandanna can fulfill functions of one or more of the intake filter and the exhaust filters. For example, the bandanna can fulfill functions of both the intake filter and the exhaust filters. For example, the mask comprises a microphone located on the inside of the mask for ease of communication by a masked user. For example, the mask protects one or more of the user and others from one or more of a disease, a virus, a flu, and an illness other than COVID-19.

For example, other embodiments of the invention comprise one or more of disposable embodiments and embodiments designed for one or more of children, adults, athletes, physicians, other medical workers, and users with facial hair. Additional embodiments of the invention are designed for use by users participating in sports. For example, disposable models of embodiments of the invention are also provided that are usable for approximately one day to three weeks. For example, the disposable embodiments comprise a left strap that is smaller than the left strap used according to non-disposable embodiments of the invention. For example, the disposable embodiments comprise a right strap that is smaller than the right strap used according to non-disposable embodiments of the invention. For example, the disposable embodiments comprise a left strap that does not comprise Velcro. For example, the disposable embodiments comprise a right strap that does not comprise Velcro.

For example, disposable embodiments may comprise the intake filter without comprising the intake valves. These embodiments will also omit the intake valve panel.

For example, embodiments of the invention designed for children may be sized smaller than the principal embodiment of the invention. For example, the embodiments of the invention designed for children comprise two intake valves rather than four intake valves as per the disclosed principal embodiment of the invention.

For example, embodiments of the invention designed for one or more of doctors and other medical workers comprise one or more of a disposable intake filters and a disposable exhaust filter.

For example, embodiments of the invention designed for athletes comprise more than four intake valves. For example, embodiments of the invention designed for athletes comprise six intake valves. For example, the embodiments of the invention designed for athletes comprise an intake valve panel comprising the six intake valves. For example, embodiments of the invention designed for athletes comprise eight intake valves. For example, the embodiments of the invention designed for athletes comprise an intake valve panel comprising the eight intake valves. For example, the embodiments of the invention designed for athletes comprise intake valves having a larger diameter. For example, embodiments of the invention designed for athletes comprise more than two exhaust valves. For example, the embodiments of the invention designed for athletes comprise exhaust valves having a larger diameter. For example, the embodiments of the invention designed for athletes comprise two exhaust valves on each of the two sides of the mask. Further embodiments of the invention comprise one exhaust valve. Other embodiments of the invention omit the exhaust filter. Still further embodiments of the invention omit the intake filter. Still other embodiments of the invention omit the intake valves.

A yet further advantage of embodiments of the invention is low cost. An additional advantage of embodiments of the invention is mass producibility. Another advantage of embodiments of the invention is particularly low cost for disposable embodiments. A still other advantage of embodiments of the invention is ease of manufacture. A still further advantage of embodiments of the invention is cost efficiency.

The representative embodiments and disclosed subject matter, which have been described in detail herein, have been presented by way of example and illustration and not by way of limitation. It will be understood by those skilled in the art that various changes may be made in the form and details of the described embodiments resulting in equivalent embodiments that remain within the scope of the invention. It is intended, therefore, that the subject matter in the above description shall be interpreted as illustrative and shall not be interpreted in a limiting sense.