WO2021053633A1 - A wearable multi-tier respiratory filtration device - Google Patents
A wearable multi-tier respiratory filtration device Download PDFInfo
- Publication number
- WO2021053633A1 WO2021053633A1 PCT/IB2020/058766 IB2020058766W WO2021053633A1 WO 2021053633 A1 WO2021053633 A1 WO 2021053633A1 IB 2020058766 W IB2020058766 W IB 2020058766W WO 2021053633 A1 WO2021053633 A1 WO 2021053633A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- filter screen
- face piece
- windows
- user
- cough
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/02—Masks
- A62B18/025—Halfmasks
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
Definitions
- the present disclosure relates to the field of wearable respiratory filtration devices.
- Respiratory mask refers to a mask used by an individual to filter the air being inhaled and to protect the individual from dust, pathogens, harmful gases, unpleasant odor, and other suspended particles.
- N95 refers to the capability of a respiratory mask to block at least 95% of small (0.3 micron) test particles, wherein ‘N’ stands for ‘not oil resistant’.
- N99 refers to the capability of a respiratory mask to block at least 99% of small (0.3 micron) test particles, wherein ‘N’ stands for ‘not oil resistant’.
- respiratory masks are often designed to cover a portion of a user's face, for example, the user's mouth and/or the user's nose to seek protection of the user’s respiratory system. These masks protect the users from air-borne diseases, unpleasant smell, hazardous and noxious environments.
- the filtering element is secured to the mask and gets contaminated. Since, the filtering element is permanently secured to the face piece of the mask the entire mask needs to be disposed, thereby resulting in hazardous waste.
- Different masks are used for different environments or applications, wherein each mask is having a particular type of filtering element secured therein.
- the conventional masks are designed to protect the user from airborne diseases, these masks fail to avoid the spread of disease from the patient to nearby people when the patient coughs or sneezes with the mask in place. Further, the conventional masks fail to filter the forcefully exhaled air while coughing or sneezing, which eventually results in the spread of the airborne diseases.
- An object of the present disclosure is to provide a wearable multi-tier respiratory filtration device.
- Yet another object of the present disclosure is to provide a wearable multi-tier respiratory filtration device that filters forcefully exhaled air.
- the face piece includes a border configured to facilitate cushioning of the region around the nose and the mouth of the user.
- Figure 4 illustrates a bottom view of the face piece of Figure 1;
- Figure 7 illustrates a side view of the first filter screen of Figure 6
- Figure 10 illustrates a front isometric view of the first frame of Figure 8
- Figure 11 illustrates a top view of the first frame of Figure 8;
- Figure 12 illustrates a bottom view of the first frame of Figure 8.
- Figure 13 and Figure 14 illustrate an exploded view of the first filter screen and the first frame together being assembled in the face piece;
- Figure 15 illustrates a rear view of a completely assembled face piece with the first filter screen and the first frame;
- Figures 16 and 17 illustrate an exploded view of a second filter screen and a second frame being connected on outer surface of the face piece of Figure 13;
- Figure 18 illustrates a half cut section of the wearable multi-tier respiratory filtration device
- Figure 19 illustrates a rear isometric view of the completely assembled multi-tier respiratory filtration device
- Figure 20 illustrates a front isometric view of the completely assembled multi-tier respiratory filtration device of Figure 19;
- Figure 21 illustrates a front view of the wearable multi-tier respiratory filtration device of Figure 19.
- Figure 22 illustrates a side view of the wearable multi-tier respiratory filtration device of
- first, second, third, etc. should not be construed to limit the scope of the present disclosure as the aforementioned terms may be only used to distinguish one element, component, region, layer or section from another component, region, layer or section. Terms such as first, second, third etc., when used herein do not imply a specific sequence or order unless clearly suggested by the present disclosure.
- the present disclosure therefore envisages a wearable multi-tier respiratory filtration device.
- the wearable multi-tier respiratory filtration device (herein after referred to as “device 100”) is now described with the help of Figure 1 through Figure 22.
- the device 100 provides a filtration efficacy of ‘N95’ for air being inhaled, thus protecting the user from harmful airborne pathogens. Further, the device 100 provides a cumulative filtration efficacy of around ‘N99’ for the forcefully exhaled air, thus preventing the spread of airborne diseases.
- the double chamber respirator arrangement of the device 100 ensures efficient filtration of the forceful exhaled air.
- the device 100 comprises a face piece 102, a first filter screen 104A, a second filter screen 104B, a first frame 106A, a second frame 106B, top ears 110, bottom ears 112, and nasal adjustable clip 108.
- the ears 110 and 112 are provided with slots (114A, 114B) to receive bands for placing the device 100 around the face of the user.
- the first filter screen 104A provides particulate filtration efficacy (PFE) of 95% to particle size of about 0.3 microns.
- PFE particulate filtration efficacy
- the first filter screen 104A assures protection to the user against all sorts of dusts (i.e. organic or inorganic) in any type of working environment;
- the first filter screen 104A prevents air leak and provides filtration of the contagious aerosols to nearly 100%
- the first filter screen 104A has air permeability of 3.24 to 3.72 cm of H 2 0/cm which is as per American Society for Testing and Materials (ASTM) norms.
- the nasal adjustable clip 108 is placed at portion of the face piece 102 such that it snugs to the nose of the user.
- the nasal adjustable clip 108 is configured to be adjusted as per the size of nose of a user.
- the nasal adjustable clip 108 when properly snugged holds the first filter screen 104A in the inner portion of the face piece 102 such that the first filter screen 104A remains in contact with the nose and mouth of the user.
- the nasal adjustable clip 108 is connected to the arch of the face piece 102, around the nose portion.
- the nasal adjustable clip 108 provides a “nose pinch” to ensure a good seal between the first filter screen 104A, face piece 102 and the nose.
- the nasal adjustable clip 108 is made of aluminum.
- the second frame 106B is detachably fastened to face piece 102 on the outer surface.
- a first pair of locking elements 120 A and a second pair of locking elements 120B are configured on the inner surface of the second frame 106B, for connecting the second frame 106B to the face piece 102.
- the second filter screen 104B is mounted between the face piece 102 and the second frame 106B.
- the second frame 106B has the second filter screen 104B and is configured to be detachably secured on the operative outer surface of the face piece 102 to allow the second filter screen 104B to cover each of the cough windows 102D.
- Figures 16 and 17 illustrate exploded views of the multi-tier respiratory filtration device 100.
- the first filter screen 104A is detachably fixed to the first frame 106 A and the second filter screen 104B is detachably fixed to the second frame 106B.
- the filter screens (104A and 104B) include a single layer or multiple layers of same or different filter medium(s).
- the locking elements (120 A and 120B) are configured to be fixed on the ribs of the face piece 102, such that to hold the second frame 106B at the cough windows 102D of the face piece 102.
- the first filter screen 104 A and the second filter screen 104B are configured to provide a multi-tier filtration of the forcefully exhaled air discharged while sneezing and coughing via each of the cough windows 102D. This ensures outflow of fresh air free of contagious germs and bacteria to be discharged from the device 100.
- the device 100 provides a two-tier filtration arrangement, wherein a first chamber 101 A is defined on the inner side of the device/mask between the first filter screen 104A and the face of the user.
- the first chamber 101A covers the nose, mouth, chin portion.
- the first chamber 101 A assures particulate filtration efficiency (PFE) of N95 and Bacterial Filtration Efficiency (BFE) of 100%.
- the device 100 has a first chamber 101 A and a second chamber 101B.
- the first chamber 101A of the device 100 is defined inside the face piece 102 i.e. the first filter screen 104A and the first frame 106 A and the second chamber 101B is defined in the outer surface of the face piece 102 and the inner surface of the second filter screen 104B.
- the second chamber 101B covers the cough windows 102D from the outer side.
- the second chamber 101B covers and seals the cough windows 102D of the device 100 and mostly addresses the filtration of the forcefully exhaled air while coughing and sneezing.
- the second chamber 101B can help to achieve a cumulative filtration efficacy close to N99 level/standard and a BFE of 100%.
- the second filter 104B is made up of medical grade materials such as polypropylenes, and thermoplastics.
- the material of second filter 104B is soft, flexible, and washable and can be treated for disinfection.
- the first filter screen 104A can be used for 24 to 48 hours and should be replaced after specified time.
- the face piece 102 is disinfected by a suitable means and is reused.
- the device 100 is designed to cover the nose and the mouth of a user.
- the face piece 102 has top ears 110 and bottom ears 112 to hold the device 100 securely on the face of the user.
- Each of the top ears 110 and the bottom ears 112 is having a slot (114A, 114B) configured thereon to receive an elastic band i.e. a head band 116 and a neck band 118 respectively.
- the head band 116 passes through each of the slots 114A of the top ears 110 & extends around the back of the head of the user.
- the neck band 118 passes through each of the slots 114B of the bottom ears 112 and extends around the back of the neck portion of the user.
- the head bands 116 and the neck bands 118 facilitate easy securing of the device 100 against the face.
- the head bands 116 and the neck bands 118 facilitate comfortable seating and reliable holding of the device 100 over the nose portion and the mouth of the user.
- the device 100 of the present disclosure is a multi-filtration mask for safe breathing and provides a high efficacy filtration of forcefully exhaled air while coughing and sneezing.
- the device 100 is designed for safe breathing and to break the chain of transmission of airborne diseases.
- the device 100 is washable, can be processed for disinfection.
- a cover, catch and trap method used by the device 100 facilitates to provide a multitier filtration mask system.
- the device 100 is designed taking in consideration of the cough and sneeze aerodynamics the air flow pressures, flow rates, and the flow volume.
- the device 100 will sustain against high- level air flow velocity in the range of 80 miles/hour to 100 miles/hour while coughing or sneezing.
- Only the first filter screen 104A is changed according to type of environment or application whereas the face piece 102 and the first frame 106 A, the second filter screen 104B, and the second frame 106B remain the same.
- the face piece 102 the first frame 106A, the second filter screen 104B, and the second frame 106B are sterilized after the use and only the first filter screen 104A is disposed as compared to the conventional masks.
- the device 100 protects the user from various airborne contagious diseases like Tuberculosis, SARS, Influenza, H1N1, and more other bacterial and viral contagious airborne diseases. Special care is taken for disinfection of the used first frame 106 A, the second frame 106B and the face piece 102 by providing home base disinfection system.
- Special care is taken for disinfection of the used first frame 106 A, the second frame 106B and the face piece 102 by providing home base disinfection system.
- the device 100 of the present disclosure has application as following:
- the device 100 also finds its application in medical industries/field as follows:
- a battery operated mini exhaust fan (not shown in figures) is installed in the second chamber of the device 100 for exhausting the breathed out air.
- the exhaust fan (not shown in figures) provides comfortable breathing by maintaining cool air in the breathing zone.
- both the chambers (101A, 101B) are clubbed to form a multi-tier respiratory filtration device 100.
- the advantage of using the multi-tier filtration device 100 is that, the patient as well as people in the vicinity such as nurses, relatives, and the general public is protected from airborne diseases.
- the use of the device 100 of the present disclosure ensures safety of the doctors, nurses, laboratory staff, other patients, and close contacts of the patient infected with airborne disease.
Abstract
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN201921037881 | 2019-09-19 | ||
IN201921037881 | 2019-09-19 | ||
IN201921050897 | 2019-12-10 | ||
IN201921050897 | 2019-12-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2021053633A1 true WO2021053633A1 (en) | 2021-03-25 |
Family
ID=74884603
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2020/058766 WO2021053633A1 (en) | 2019-09-19 | 2020-09-21 | A wearable multi-tier respiratory filtration device |
Country Status (1)
Country | Link |
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WO (1) | WO2021053633A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017142126A1 (en) * | 2016-02-17 | 2017-08-24 | (주)대성엠텍 | Functional mask |
-
2020
- 2020-09-21 WO PCT/IB2020/058766 patent/WO2021053633A1/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017142126A1 (en) * | 2016-02-17 | 2017-08-24 | (주)대성엠텍 | Functional mask |
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