A nonreturn valve (10) for a compact ventilation system (100), includes a recoil membrane (20) and a holding element (40) for holding the recoil membrane (20) and for fastening the nonreturn valve (10) at a flow duct (110) of the compact ventilation system (100). The recoil membrane (20) has at least one mechanical stabilizing section (22) for cooperating with at least one mechanical counter-stabilizing section (42) of the holding element (40) or of the flow duct (110) of the compact ventilation system (100). At least one opening section (24) is provided for the defined movement of the recoil membrane (20) during the opening of the nonreturn valve (10) and a holding section (26) is provided for holding the recoil membrane (20) at a counter-holding section (46) of the holding element (40). A compact ventilation system (100) is provided with such a nonreturn valve (10).

A face mask is provided. The mask comprises a body defining an interior side and an exterior side of the face mask; a one-way inlet valve that only allows gas to pass from the exterior side of the body to the interior side; and a one-way outlet valve that only allows gas to pass from the interior side of the body to the exterior side. By providing a face mask configured in this manner, the mask is able to provide fresh air to the wearer while reducing the likelihood of contamination by pathogens or other toxic matter.

A face mask is provided. The mask comprises a body defining an interior side and an exterior side of the face mask; a one-way inlet valve that only allows gas to pass from the exterior side of the body to the interior side; and a one-way outlet valve that only allows gas to pass from the interior side of the body to the exterior side. By providing a face mask configured in this manner, the mask is able to provide fresh air to the wearer while reducing the likelihood of contamination by pathogens or other toxic matter.

A face mask system for removal of pathogens from exhaled air comprising at least one flexible layer comprising a first surface and a second surface, said second surface being opposite to the first surface, and the first surface being in sealingly contact with the face of a user and the second surface being exposed to the environment, wherein at least one layer is provided with an exit port and an inlet port and further wherein the exit port is sealingly connected to a deformable outflow chamber and said exit port further comprising a one way exit valve that is configured to open when a user exhales air and which exit valve closes when the user inhales air.

A face mask system for removal of pathogens from exhaled air comprising at least one flexible layer comprising a first surface and a second surface, said second surface being opposite to the first surface, and the first surface being in sealingly contact with the face of a user and the second surface being exposed to the environment, wherein at least one layer is provided with an exit port and an inlet port and further wherein the exit port is sealingly connected to a deformable outflow chamber and said exit port further comprising a one way exit valve that is configured to open when a user exhales air and which exit valve closes when the user inhales air.

Described herein is a multi-mask equipment (100) that includes a mask assembly M configured to accommodate a filter assembly C, D and to mount a face protective shield H. The equipment enables a filter-based mask and shield can be used together as one integrated unit, and at the same time is future ready with more options to mount or use various other accessories, like oxygen inlet/outlet, electronic equipment etc. The multi-mask equipment 100 can be mounted over the head of a wearer by means of headbands as mounting mechanism F(LHS and RHS) and straps as adjusting mechanism A3. The equipment ensures that the overall cost of the mask and face protective shield assembly is substantially low as the equipment requires bare minimum recurring cost.

Described herein is a multi-mask equipment (100) that includes a mask assembly M configured to accommodate a filter assembly C, D and to mount a face protective shield H. The equipment enables a filter-based mask and shield can be used together as one integrated unit, and at the same time is future ready with more options to mount or use various other accessories, like oxygen inlet/outlet, electronic equipment etc. The multi-mask equipment 100 can be mounted over the head of a wearer by means of headbands as mounting mechanism F(LHS and RHS) and straps as adjusting mechanism A3. The equipment ensures that the overall cost of the mask and face protective shield assembly is substantially low as the equipment requires bare minimum recurring cost.

A device for individual protection and isolation against pollutants and microorganisms comprises a protection element (1) of the face designed to be worn by the user to at least partially cover the face and a filtering group (2) of the air inhaled and/or exhaled by the user. The protection element (1) is adapted to cover at least the whole face of the user and has at least one mouth for the passage of air provided with a one-way check valve (7) suitable to selectively allow the entry and the exit of air from said protection element (1), said filtering group (2) comprising a filter body (4) housing a filter (15) for purifying the entering or leaving air and in fluidic connection with the inside of said protection element (1) by means of an access made in said protection element (1) distinct from said mouth, said filter body (4) having a first opening for drawing air from the outside and/or the expulsion of air towards the outside and a second opening for the delivery of the air into and/or the withdrawal of air from said protection element (1).

A device for individual protection and isolation against pollutants and microorganisms comprises a protection element (1) of the face designed to be worn by the user to at least partially cover the face and a filtering group (2) of the air inhaled and/or exhaled by the user. The protection element (1) is adapted to cover at least the whole face of the user and has at least one mouth for the passage of air provided with a one-way check valve (7) suitable to selectively allow the entry and the exit of air from said protection element (1), said filtering group (2) comprising a filter body (4) housing a filter (15) for purifying the entering or leaving air and in fluidic connection with the inside of said protection element (1) by means of an access made in said protection element (1) distinct from said mouth, said filter body (4) having a first opening for drawing air from the outside and/or the expulsion of air towards the outside and a second opening for the delivery of the air into and/or the withdrawal of air from said protection element (1).

A face mask includes a filter body including a composite film. The composite film includes a first layer of a stretched sintered polymeric material, and a second layer of an expanded polymer film secured to the first layer. The face mask includes one or more straps for securing the filter body over the mouth and nose of a wearer. A process for making a face mask includes providing a composite film including a sintered polymeric material adjacent an expanded polymer film, thermoforming the composite film to produce a filter body of the face mask, and attaching one or more straps to the filter body.