• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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    • 专利摘要:
    Methods and Devices for Checking Respirator Negative Pressure Fit The present invention relates to a respiratory mask body that defines a zone of air breathable by a user and that has a shut-off valve. in an exemplary embodiment, the mask body includes one or more inlet ports configured to receive one or more components of the breathing air source. the shutoff valve is operable between a closed position and an open position, and when in a closed position the shutoff valve prevents fluid communication between the one or more inlet ports and the breathing air zone and the shutoff valve returns to an open position in the absence of an applied force.
    公开号:BR112015018256B1
    申请号:R112015018256-9
    申请日:2014-01-20
    公开日:2022-01-04
    发明作者:William A. Mittelstadt；Carl W. Raines Iii；David R. Stein；Nathan A. Abel；David M. Blomberg；Michael J. Cowell；Gary E. Dwyer；Thomas I. Insley；Michael J. Svendsen
    申请人:3M Innovative Properties Company；
    IPC主号:
    专利说明:

    technical field
    [001] This invention relates to methods and devices of respiratory protection, in particular, a respiratory protection device including a shut-off valve, and a method of performing a negative pressure fit check of a respiratory protection device. including a shut-off valve. background
    [002] Respiratory protection devices commonly include a mask body and one or more filter cartridges that are attached to the mask body. The mask body is worn on a person's face, over the nose and mouth, and may include portions that cover the head, neck, or other parts of the body in some cases. Pure air is made available to a user after passing through filter media arranged in the filter cartridge. In negative pressure respiratory protection devices, air is drained through a filter cartridge by negative pressure generated by a user during inhalation. Air from the external environment passes through the filter media and enters an interior space of the mask body where it can be inhaled by the wearer.
    [003] In order to effectively provide breathing air to a wearer, respiratory protective devices desirably provide an adequate seal to prevent unfiltered air from entering the mask. Various techniques for testing the integrity of a seal provided by a respiratory protection device have been proposed. In a positive pressure test, an exhalation valve on the respiratory protective device is blocked while the wearer exhales into the mask. A proper seal can be signaled by an increase in internal pressure, due to the inability of the air inside the mask to escape through an exhalation valve if a leak is not present. Alternatively, negative pressure tests have been proposed in which a filter cartridge port is blocked while a user inhales while wearing the mask. A proper seal can be signaled by reduced internal pressure, due to the inability of air to enter the mask if a leak is not present. summary
    [004] The present disclosure provides a breathing mask, including a mask body defining a breathing air zone for a wearer and having one or more air inlet ports configured to receive one or more breathing air source components, and a shut-off valve operable between a closed position and an open position. In a closed position, the shutoff valve prevents fluid communication between the one or more inlet ports and the breathing air zone, and the shutoff valves return to an open position in the absence of an applied force. In an exemplary embodiment, the mask body includes two or more inlet ports configured to receive two or more breathing air source components, and in a closed position the shutoff valve prevents fluid communication between the two or more air sources. pure and breathable air zone.
    [005] The present disclosure further provides a respiratory mask including a mask body defining a breathing air zone for a wearer and having one or more air inlet ports configured to receive one or more air source components. breathable, and a shut-off valve operable between a closed position and an open position. In a closed position, the shutoff valve prevents fluid communication between the one or more inlet ports and the breathing air zone, and when the mask body is positioned for use over a wearer and negative pressure is obtained after closing the shut-off valve and inhale, the shut-off valve remains in the closed position due to a negative pressure in the breathing air zone.
    [006] The present disclosure further provides a breathing mask including a mask body defining a breathing air zone for a wearer and having two or more inlet ports configured to receive one or more breathing air source components, and a shut-off valve operable between a closed position and an open position. In a closed position, the shut-off valve prevents fluid communication between the two or more inlet ports and the breathing air zone, and inhalation by a user, while the shut-off valve is in a closed position provides an indication of the presence. of leaks around a periphery of the mask body.
    [007] The summary above is not intended to describe each of the modalities presented or the entire implementation. The figures and the Detailed Description below more particularly exemplify the illustrative embodiments. Brief description of drawings
    [008] The disclosure can be further explained with reference to the attached Figures, in which similar structure is referred to by similar numbers throughout the different views, and in which:
    [009] Figure 1a is a front perspective view of an exemplary respiratory protection device in accordance with the present disclosure.
    [010] Figure 1b is a cross-sectional view of an exemplary respiratory protection device according to the present disclosure.
    [011] Figure 1c is a cross-sectional perspective view of an exemplary respiratory protective device in accordance with the present disclosure showing a shut-off valve in an open position.
    [012] Figure 1d is a cross-sectional perspective view of an exemplary respiratory protection device in accordance with the present disclosure showing a shut-off valve in a closed position.
    [013] Figure 2a is a cross-sectional perspective view of an exemplifying respiratory protection device in accordance with the present disclosure showing a shut-off valve in an open position.
    [014] Figure 2b is a cross-sectional perspective view of an exemplary respiratory protective device in accordance with the present disclosure showing a shut-off valve in a closed position.
    [015] Figure 3a is a partial perspective view of an exemplary respiratory protective device in accordance with the present disclosure showing a shut-off valve in an open position.
    [016] Figure 3b is a partial perspective view of an exemplary respiratory protective device in accordance with the present disclosure showing a shut-off valve in a closed position.
    [017] Figure 4a is a partial perspective view of an exemplary respiratory protection device in accordance with the present disclosure showing a shut-off valve in an open position.
    [018] Figure 4b is a partial perspective view of an exemplary respiratory protective device in accordance with the present disclosure showing a shut-off valve in a closed position.
    [019] Figure 5a is a front perspective view of an exemplifying respiratory protection device according to the present disclosure.
    [020] Figure 5b is a partial perspective view of an exemplary respiratory protective device in accordance with the present disclosure showing a shut-off valve in an open position.
    [021] Figure 5c is a partial perspective view of an exemplary respiratory protective device in accordance with the present disclosure showing a shut-off valve in a closed position.
    [022] Although the figures identified above present several modalities of the presented subject, other modalities are also contemplated. In all cases, this disclosure presents the matter revealed by way of representation and not by limitation. It is to be understood that numerous other modifications and embodiments may be conceived by those skilled in the art which fall within the scope and spirit of the principles of this disclosure. Detailed Description
    [023] The present disclosure provides a respiratory protective device including a mask body defining a breathing air zone for a wearer and having one or more air inlet ports configured to receive one or more breathing air source components. A shut-off valve operable between a closed position and an open position is provided to allow a user to easily perform a negative pressure fit test. In a closed position, the shutoff valve prevents fluid communication between each of the one or more inlet ports and the breathing air zone. Inhalation by a user results in negative internal pressure within the mask if the respiratory protective device is properly fitted and a proper seal is achieved.
    [024] Figures 1a to 1d illustrate an exemplary respiratory protective device 100 that can cover the nose and mouth and provide breathing air to a wearer. The respiratory protective device 100 includes a mask body 120 including one or more inlet ports, such as a first inlet port 103, and/or a second inlet port 104. One or more components of the breathing air source may be positioned in one or more of the inlet ports of the mask body 120. In an exemplary embodiment, the first and second components of the breathing air source 101, 102 are provided and include filter cartridges configured to be affixed to the first and second inlet ports 103 and 104. Filter cartridges 101 filter air 102 is received from the outside environment before the air passes into the interior space within the mask body for application to a wearer.
    [025] The mask body 120 may include a rigid or semi-rigid portion 120a and a malleable face contacting portion 120b. The malleable face contacting portion of the mask body is compliantly formed to allow the mask body to be comfortably supported over a person's nose and mouth and/or to provide an adequate seal with the wearer's face to limiting undesired ingress of air into the mask body 120, for example. The face contact element 120b may have an inwardly facing cuff so that the mask can fit comfortably and securely over the wearer's nose and against the wearer's cheeks. The rigid or semi-rigid portion 120a provides structural integrity to the mask body 120 so that it can properly support breathing air source components, such as filter cartridges 101, 102, for example. In various exemplary embodiments, mask body portions 120a and 120b may be provided integrally or as separately formed portions that are subsequently permanently or removable joined together.
    [026] An exhalation port 130 allows air to be purged from an interior space within the mask body during exhalation by a wearer. In an exemplary embodiment, the exhalation port 130 is located centrally on the mask body 120. An exhalation valve is mounted on the exhalation port to allow air to escape, due to the positive pressure created within the mask body 120 upon exhalation, but prevents the entry of external air. In some exemplary embodiments, exhalation port 130 is positioned lower on mask body 120, for example below a wearer's nose and mouth.
    [027] A headgear, or other support (not shown) may be provided to support the mask in position over a wearer's nose and mouth. In an exemplary embodiment, a harness is provided which includes one or more straps that pass behind the wearer's head. In some embodiments, the straps may be attached to a crown element resting on a wearer's head, a suspension for a hard hat, or other head covering.
    [028] The one or more inlet ports of the mask body 120 are configured to receive one or more components of the breathing air source. In an exemplary embodiment including two or more breathing air source components, as shown in Figure 1a, mask body 120 includes first and second inlet ports 103, 104 on each side of mask body 120, and may be adjacent to cheek portions of mask body 120. The first and second inlet ports 103, 104 include complementary coupling features (not shown) such that the first and second components of the breathing air source 101 , 102 may be securely attached to mask body 120. Other suitable connections may be provided as is known in the art. The coupling features may result in a removable connection so that the breathing air source components 101, 102 can be removed and replaced at the end of the breathing air source component's life or if the use of a different breathing air source component is desired. Alternatively, the connection may be permanent so that the breathing air source components cannot be removed without damage to the breathing air source component, for example.
    [029] The respiratory protective device 100 includes a shut-off valve 150 for closing a fluid inflow communication component. In an exemplary embodiment, shut-off valve 150 is operable between a closed position and an open position. In a closed position, the shut-off valve 150 prevents fluid communication between each of the one or more components of the breathing air source, such as the filter cartridge 101 and/or 102, and a breathing air zone of mask body 120.
    [030] Shut-off valve 150 allows a user to perform a negative pressure fit check to provide an indication of the presence of leaks around a periphery of the mask body. When the shut-off valve 150 is in the closed position, air is prevented from entering a breathing air zone of the mask body 120. Inhalation by a user while the shut-off valve is in a closed position will result in negative pressure. inside the mask, and in an exemplary embodiment, may cause greater difficulty for a wearer to inhale or cause a malleable face contact element to deflect inward if a proper seal has been achieved between the mask body and the face of the mask. user. If a proper seal is not achieved, inhalation may result in air from the outside environment entering the breathing air zone between the periphery of the mask body and the wearer's face. In this way, a negative pressure fit check can easily be performed by a user wearing the respiratory protective device 100 to determine if an adequate seal is achieved between the respiratory protective device 100 and the face and/or head of the wearer.
    [031] Figure 1b shows a representative cross-sectional view of an example mask body 120 through a mid-portion of the example mask body 120. The example mask body 120 includes a first chamber 121 and a second chamber 122. A zone of breathing air is defined by the second chamber 122. In some embodiments, the first and second components of the breathing air source 101, 102, such as filter cartridges, may be attached to the first and second inlet ports 103, 104. The first and second inlet ports 103, 104 second inlet ports 103, 104 are in fluid communication with the first chamber 121. Consequently, the air entering the mask body 120 through the first inlet port 103 after passing through the first component of the breathing air source 101 is in communicating with the air entering the mask body 120 through the second inlet port 104, after passing through the second component of the breathing air source 102. The air from the first and second breathing air sources 101, 102 is thereby allowed to mix in the first chamber 121 before being applied to the breathing air zone defined by the second chamber 122 of the mask body 120.
    [032] In an exemplary embodiment, the first and second chambers 121, 122 are separated by an inner wall 124 having a fluid inflow communicating member 140. The fluid inflow communicating member 140 comprises one or more openings for provide fluid communication between the first and second chambers 121, 122. The fluid inflow communication component 140 may include an inhalation valve to selectively allow fluid communication between the first and second chambers 121, 122, as described in more detail below.
    [033] The first chamber 121 is defined by one or more walls of the mask body 120 and can have any desired shape. In an exemplary embodiment, the first chamber 121 is defined, in part, by an outer wall 123 which is an outer wall of the mask body 120, and an inner wall 124. The first chamber 121 is substantially sealed off from the external environment with the exception of one or more inlet ports, such as first and second inlet ports 103, 104 extending through the outer wall 123.
    [034] A chamber defined, at least in part, by the walls of the mask body 120 and formed integrally with the mask body 120, or rigid or semi-rigid portion 120a, provides a chamber within the structure of the mask body 120 that can be configured to minimize extra bulk or weight, which may be associated with a chamber separate from a mask body. In addition, a chamber can be provided in close proximity to a wearer's head so that the profile of the respiratory protection device is not greatly increased, minimizing a large moment of inertia in the opposite direction to a wearer's head that may be perceived. such as neck pain or other discomfort for a user.
    [035] The second chamber 122 is similarly defined by one or more walls of the mask body 120 and can be of any suitable shape that defines a zone of breathable air over a wearer's nose and mouth. In an exemplary embodiment, the second chamber 122 is defined, in part, by the inner wall 124, a portion of the outer wall 123, and, when respiratory protective device 100 is positioned for use on a wearer, a portion of the face and /or from the user's head. In various embodiments, inner wall 124 separates an interior space defined by outer wall 123 into first chamber 121 and second chamber 122, including a portion of outer wall 123 in front of inner wall 124 that partially defines first chamber 121, and a portion of the outer wall 123 closest to the wearer's face partially defining the second chamber 122.
    [036] In an exemplary embodiment, the first chamber 121 can function as a duct to direct air from one or more inlet ports, such as the first and/or second inlet ports 103, 104, for example, to a different location on the mask body 120. While many traditional breathing masks supply fresh air from a cartridge through an inlet port and into the mask body at the inlet port location, the first chamber 121 allows one or more inlet ports 103, 104 are positioned generally independent of fluid inflow communication component 140. In an exemplary embodiment, inlet ports 103, 104 are positioned near cheek portions of mask body 120, and the fluid inflow communication component 140 is centrally positioned. For example, the fluid inflow communication component is positioned adjacent to a central axis that extends through the mask and divides the mask body 120 into left and right imaginary halves, such as axis 190. Such a component can be said to as being centrally positioned if some portions of the component are positioned on either side of axis 190. A configuration in which one or more inlet ports 103, 104 are positioned near cheek portions as a fluid inflow communicating component 140 is centrally located may allow a breathing air source component to be received in a desirable position and/or orientation, e.g. extending rearwardly along the wearer's face, so as to minimize obstruction to the field of view. or maintaining the cartridge's center of mass in close proximity to the mask body 120 and/or the wearer's face. The fluid inflow communication component 140, however, may still be centrally positioned so as to deliver clean air in close proximity to a user's nose and mouth, and in an exemplary embodiment is provided with a superior central location. In this way, the first chamber 121 allows the first and second components of the breathing air source to be positioned to provide desired ergonomic features, and allows the fluid inflow communicating component 140 to be positioned to provide a desirable airflow for the user, for example. Additionally, the first chamber 121 allows the first and second inlet ports to be in fluid communication with a single fluid inflow communication component. A respiratory protective device having two or more breathing air source components and a single fluid inflow communication component can reduce production costs and provide a more robust respiratory protective device. Expensive fluid inflow communication components can be minimized, and the use of relatively fragile diaphragms or flaps can be reduced.
    [037] Figures 1c and 1d provide partial cross-sectional views showing an exemplary content valve 150 of respiratory protection device 100. As described above, mask body 120 includes first and second chambers 121 and 122 separated by inner wall 124. In an exemplary embodiment, inner wall 124 includes a fluid inflow communicating member 140 including an inhalation port 141 to allow fluid communication between the first chamber 121 and the second chamber 122. The fluid inflow communication component 140 allows air to drain into the second chamber 122 from the first chamber 121 during inhalation, but prohibits the passage of air from the second chamber 122 to the first chamber 121. In exemplary embodiment, fluid inflow communication member 140 includes a diaphragm or tab 143. Diaphragm or tab 143 may be secured to a central location 144 by one or more pins or flanges. central areas, for example, or at a peripheral edge or other suitable location, as is known in the art. In the absence of negative pressure within the second chamber 122 of the mask body 120, as when a wearer is exhaling, for example, the diaphragm is forced toward a surface of the fluid inflow communicating component, such as seal ring 145. During inhalation by a user, negative pressure within the second chamber 122, i.e. a pressure lower than the pressure of the external atmosphere, may result in the diaphragm or flap 143 being in an open position to allow air into the second chamber 122 from the first chamber 121. That is, the diaphragm or flap 143 bends or moves in the opposite direction to the sealing ring 145 such that air can pass into the second chamber 122 for inhalation by a user. In various exemplary embodiments, the fluid inflow communicating component 140 may include multiple inhalation ports and/or two or more diaphragms or flaps 143 to selectively permit fluid communication of the first chamber 121 with the second chamber 122 when pressure in the second chamber 122 is negative.
    [038] In an exemplary embodiment, the shutoff valve 150 of the mask body 120 includes an actuator 151 and a seal block 152. In a closed position, the seal block 152 makes contact with the inner wall 124 to block the valve port. inhalation 141 to prevent fluid communication between the two or more sources of breathing air and the breathing air zone defined by the second chamber 122. When shut-off valve 150 is in the closed position, air from components of breathing air source 101, 102 is in fluid communication with the first chamber 121 but is prevented from entering the breathing air zone defined by the second chamber 122 via the fluid inflow communicating member 140. In an exemplary embodiment, the sealing block 152 comes into contact with a sealing surface 146 that surrounds the inhalation port 141. The sealing surface 146 may be in the form of a ridge or projection extending outwardly from the inner wall 124 to allow that a proper seal is obtained around a periphery of the inhalation port 141.
    [039] The sealing block 152 may be formed of a soft or resilient material so that the sealing block can bend upon contact with the sealing surface 146. In an exemplary embodiment, the sealing block 152 includes features of the seating, such as angled lips or flanges (not shown), to facilitate proper sealing with sealing surface 146. All or a portion of sealing block 152 may also pivot or rotate when in contact with sealing surface 146. A sealing block that can bend and/or pivot or rotate can facilitate the formation of a proper seal around the inhalation port 141.
    [040] In an exemplary embodiment, a rod 154 guides the seal block 152 and maintains the seal block 152 in proper alignment with the inhalation port 141 as the seal block 152 moves linearly between the open and closed positions. Seal block 152 may include a projection, flange, or other projection 153 which further serves to prevent rotation or misalignment of seal block 152. Shaft 154 extends from inner wall 124, as from a central portion of fluid inflow communicating member 140. In various other exemplary embodiments, stem 154 may extend from other portions of mask body 120, for example.
    [041] Shut-off valve 150 can be operated to switch between an open position (Figure 1c) and a closed position (Figure 1d). In an exemplary embodiment, the actuator 151 is a button, such as an overmolded elastomeric push-button, slide-button, or the like, that can be linearly pressed inward to cause the sealing block 152 to move toward the communication component. inlet fluid 140 until the sealing block 152 contacts the sealing surface 146. In an open position shown in Figure 1c, air may pass through the inhalation port 141 into the breathing air zone defined by the second chamber 122 if permitted by diaphragm or tab 143. In a closed position shown in Figure 1d, sealing block 152 is in sealing engagement with sealing surface 146 to prevent air from passing through inhalation port 141. When actuator 151 is released by a user, actuator 151 returns to an open position due to a resilient member which forces sealing block 152 in the opposite direction from a sealing engagement with sealing surface 146.
    [042] In an exemplary embodiment, an actuator 151 in the form of an elastomeric button acts as a resilient member that forces the sealing block toward an open position in the opposite direction to sealing engagement with sealing surface 146 in the absence of an applied force, for example. The actuator 151 may include a flexible net 156 attached to the outer wall 123 (Figures 1a, 1b) of the mask body 120 to support the actuator 151 and/or force the shut-off valve 150 to an open position. The mat is formed of a flexible or malleable material which is capable of elastically deforming when the actuator 151 is pressed inward by a user, as shown in Figure 1d, for example. In a closed position, the flexible mat 156 is bent and/or deformed, allowing the sealing block 152 to travel toward the sealing surface 146. Bending and/or deformation of the flexible mat 156 is desirably limited to the elastic regime so that the flexible mat 156 is capable of repeatedly returning to an original configuration in which shut-off valve 150 is in the open position.
    [043] Other resilient members may be provided in place of or in addition to a flexible mat. In various exemplary embodiments, a coil spring, spring bundle, elastomeric band, or other suitable resilient member as known in the art may be provided to force actuator 151 and/or seal block 152 into an open position. Alternatively or in addition, a spring loaded member may be provided on a surface of the sealing block 152 to force the actuator 151, and the shut-off valve 150, away from the sealing surface 146 and towards an open position. In some exemplary embodiments, a coil spring 159 is provided around the stem 154 to force the actuator 151 and sealing block 152 away from the sealing surface 146 and into an open position. A coil spring can provide a force to bias the actuator 151 and a seal block 152 in place of or in addition to one or more resilient elements, such as the elastomeric mat described above.
    [044] In an exemplary embodiment, the actuator 151 is attached to the mask body 120 so that a seal is formed between the actuator 151 and the mask body 120, for example, by overmolding the actuator onto the mask body 120. Others Suitable seals can be provided using trim, flanges, adhesive, interference fits, molding techniques, sonic welding, and other suitable techniques as known in the art to provide an adequate seal so that air and contaminants from the outside environment are unable to enter the mask body 120 adjacent the actuator 151. The presence of an adequate seal preventing the ingress of air and contaminants from the external environment is desirable because the volume surrounding the shut-off valve portions 150 internal to the body mask 120 is in fluid communication with the breathing air zone 122. A sufficient seal adjacent to the actuator 151 thus protects the breathability of air in the breathing air zone. and 122 when a shut-off valve 150 is in an open, closed or intermediate position.
    [045] Fluid inflow communication component 140 and shut-off valve 150 are configured to minimize a negative effect on pressure drop that can interfere with a user's ability to breathe freely. In various exemplary embodiments, the sealing block 152 is positioned between approximately 8 mm and 1 mm, approximately 6 mm and 2 mm, or approximately 3 mm from the sealing surface 146 when shut-off valve 150 is in an open position. That is, the sealing block 152 travels between approximately 8 mm and 1 mm, or approximately 6 mm and 2 mm, or approximately 3 mm from an open position to a closed position. Such a distance provides a shut-off valve that can be relatively compact, providing sufficient space for air to pass through when in an open position.
    [046] In various exemplary embodiments, the shutoff valve 150 may remain in a closed position due to negative pressure within the mask. That is, when performing a negative pressure adjustment check, a user can move actuator 151 to a closed position by pressing in on actuator 151, inhale, and then release actuator 151. After a user releases actuator 151 , the resilient member cannot overcome the negative pressure within the second chamber 122 applied over the seal block 152. The shut-off valve 150 may thus remain in a closed position until the user exhales or the pressure within the second chamber 122 has already not be sufficient to overcome the strength of the resilient limb. A resilient member that allows the shut-off valve 150 to remain in a closed position even after the actuator 151 is released by a user can allow a more accurate fit check because the user is not applying a force on actuator 151 that could affect the seal between the mask body 120 and the wearer's face. However, even though the resilient member allows the shut-off valve 150 to remain in a closed position due to negative pressure within a breathing air zone of the mask body 120, the shut-off valve may automatically return to an open position, with no inlet. additional for actuator 151 by the user. An increase in pressure within the mask body, resulting from exhalation by the wearer, for example, can result in the shut-off valve 150 returning to an open position in which the wearer can breathe freely. Such a feature allows a user to breathe safely without additional input to actuator 151 to return shut-off valve 150 to an open position.
    [047] In other exemplary embodiments, the shut-off valve 150 may remain in a closed position regardless of the pressure within the second chamber 122 and may return to an open position with additional input by a user.
    [048] Figures 2a and 2b illustrate an exemplary embodiment of a shut-off valve 250 having a self-aligning seal block. In an exemplary embodiment, shutoff valve 250 includes an actuator 251 and a seal block 252. In a closed position, seal block 252 contacts inner wall 224 to block inhalation port 241 to prevent fluid communication between the two or more sources of breathing air and the breathing air zone defined by the second chamber 222. When the shut-off valve 250 is in a closed position, the air from the breathing air source components 201, 202 (not shown) is in fluid communication with the first chamber 221 but is prevented from entering the breathing air zone defined by the second chamber 222 through the fluid inflow communicating member 240. In an exemplary embodiment, the sealing block 252 contacts a sealing surface 246 that surrounds the inhalation port 241. The sealing surface 246 may be in the form of a ridge or projection extending outwardly from the inner wall 224 to allow a view A suitable pattern is obtained around a periphery of the inhalation port 241. In an exemplary embodiment, the sealing surface 246 includes a first sealing surface portion 246a that surrounds an outer periphery of the inhalation port 241 and a second sealing surface portion 246b that surrounds an inner periphery of the inhalation port 241.
    [049] Seal block 252 may be formed of a soft or resilient material so that seal block 252 can bend upon contact with sealing surface 246. In an exemplary embodiment, seal block 252 includes seating features 255, such as angled or flanged lips, to facilitate proper sealing with the sealing surface 246. The whole or a portion of the sealing block 252 may also pivot or rotate when in contact with the sealing surface 246. A sealing block that can bend and/or pivoting or rotating may facilitate the formation of an adequate seal around the inhalation port 241.
    [050] In an exemplary embodiment, the sealing block 252 is attached to, and supported by, an actuator 251. Instead of traveling on a rod that projects from the fluid inflow communicating component 240, for example, the seal block 252 is guided by actuator 251. In some exemplary embodiments, seal block 252 and actuator 251 may be integrally formed as a unitary component. The seating features 245 facilitate proper alignment and/or proper sealing with the sealing surface 246. In some embodiments, the seating features 245 may include complementary features to align the sealing block 252 with the sealing surface 246.
    [051] Shut-off valve 250 can be operated to switch between an open position (Figure 2a) and a closed position (Figure 2b). In an exemplary embodiment, the actuator 251 is a button, such as an overmolded elastomeric push-button, slider, or the like, that can be pressed inward by a user to cause the sealing block 252 to move toward the communication component. inlet fluid 240 until the sealing block 252 contacts the sealing surface 246. In an open position shown in Figure 2a, air may pass through the inhalation port 241 into the breathing air zone defined by the second chamber 222 if permitted by the diaphragm or tab 243. In a closed position shown in Figure 2b, the sealing block 252 is in sealing engagement with the sealing surface 246 to prevent air from passing through the inhalation port 241. At least a portion of the sealing block 252 is flexed and/or compressed due to force applied to actuator 251, and such flexing and/or compression can facilitate proper sealing. When actuator 251 is released by a user, actuator 251 may return to an open position due to a resilient member which forces sealing block 252 in the opposite direction from a sealing engagement with sealing surface 246. In some exemplary embodiments, as described above with respect to the shut-off valve 150 for example, the shut-off valve 250 may remain in a closed position due to a negative pressure within the mask until the wearer exhales or the pressure within the second chamber 222 is no longer greater than the resilient limb strength.
    [052] In an exemplary embodiment, an actuator 251 in the form of an elastomeric button acts as a resilient member that forces the sealing block 252 towards an open position in the opposite direction from a sealing engagement with the sealing surface 246. The actuator 251 may include a flexible mat 256 attached to outer wall 223 of mask body 220 to support actuator 251 and/or force shut-off valve 250 into an open position. Flexible mat 256 is formed of a flexible or malleable material that is capable of elastically deforming when actuator 251 is pressed inward by a user. In a closed position, the flexible mat 256 is bent and/or deformed, allowing the sealing block 252 to travel toward the sealing surface 246. Bending and/or deformation of the flexible mat 256 is desirably limited to the elastic regime so that the flexible mat 256 is capable of repeatedly returning to an original configuration in which the shut-off valve is in the open position.
    [053] Other resilient members may be provided in place of, or in addition to, a flexible mat 256. In various exemplary embodiments, a coiled spring, spring bundle, elastomeric band, or other suitable resilient member as known in the art may be provided. provided to force the actuator 251 and a seal block 252 into an open position. Alternatively or in addition, a spring-loaded member may be provided on a sealing block surface 252 to force actuator 251, and shut-off valve 250, away from sealing surface 246 and into an open position.
    [054] Figures 3a and 3b illustrate an exemplary embodiment of a shut-off valve 350 having a rotation of the sealing block. In an exemplary embodiment, the shutoff valve 350 includes an actuator 351 and a seal block 352. Similar to the respiratory protection device 100 described above with reference to Figures 1a through 1d, the shutoff valve 350 may be incorporated into a device. of respiratory protection including a first chamber 321 and a breathing air zone defined by a second chamber 322, for example. In an exemplary embodiment, the first and second chambers 321, 322 are separated by an inner wall 324 including the inflow fluid communicating member 340. The inflow fluid communicating member 340 comprises one or more openings for providing communication fluid between the first and second chambers 321, 322. The fluid inflow communicating component 340 may include an inhalation valve to selectively permit fluid communication between the first and second chambers 321, 322. In an exemplary embodiment, the fluid inflow communication component 340 includes a diaphragm or flap (not shown) so that air can drain into the second chamber from the first chamber during inhalation, but prohibits the passage of air from the second chamber to the first chamber, as described above with reference to fluid inflow communicating member 140 for example.
    [055] In an exemplary embodiment, the shutoff valve 350 includes an actuator 351 and a seal block 352. In a closed position, the seal block 352 contacts the inner wall 324 to block the inhalation port 341 to prevent fluid communication between the two or more sources of breathing air and the breathing air zone defined by the second chamber 322. When shut-off valve 350 is in a closed position, air from the breathing air source components (not shown) is in fluid communication with the first chamber 321 but is prevented from entering the breathing air zone defined by the second chamber 322 via the fluid inflow communicating member 340. In an exemplary embodiment, the sealing block 352 contacts a surface seal 346 surrounding inhalation port 341. Seal surface 346 may be in the form of a ridge or projection extending outwardly from inner wall 324 to allow a seal to seal. adequate action is obtained around a periphery of the inhalation port 341.
    [056] Shut-off valve 350 can be operated to switch between an open position (Figure 3a) and a closed position (Figure 3b). In an exemplary embodiment, actuator 351 is a button, such as an overmolded elastomeric push-button, slider, or the like, that can be pressed inward by a user to cause the seal block 352 to revolve at pivot location 359 until sealing block 352 makes contact with sealing surface 346. In an open position shown in Figure 3a, air may pass through inhalation port 341 into the breathing air zone defined by second chamber 322 if allowed by the diaphragm or flap , for example. In a closed position shown in Figure 3b, the sealing block 352 is in sealing engagement with the sealing surface 346 to prevent air from passing through the inhalation port 341. At least a portion of the sealing block 352 may be flexed and/or compressed due to the force applied to the 351 actuator, and such bending and/or compression facilitates a proper seal. When actuator 351 is released by a user, actuator 351 may return to an open position due to a resilient member which forces actuator 351 into an open position. In some exemplary embodiments, as described above with respect to shut-off valve 150, for example, shut-off valve 350 may remain in a closed position due to negative pressure within the mask until the wearer exhales or pressure within the second chamber 322 is no longer greater than the strength of the resilient member.
    [057] In an exemplary embodiment, an actuator 351 in the form of an elastomeric knob acts as a resilient member that forces sealing block 352 toward an open position in the opposite direction from a sealing engagement with sealing surface 346. The actuator 351 may include a flexible mat 356 attached to an outer wall (not shown) of mask body 320 to support actuator 351 and/or force shut-off valve 350 into an open position. The mat 356 is formed of a flexible or malleable material that is capable of elastically deforming when the actuator 351 is pressed inward by a user, as shown in Figure 3b, for example. In some exemplary embodiments, actuator 351 is not attached to seal block 352. A resilient member such as flexible mat 356 forces actuator 351 into an open position and one or more additional members such as spring member 357 forces the block seal 352 to an open position. Spring member 357 may comprise any spring suitable for urging sealing block 352 into an open position including a coil spring, spring bundle, elastomeric band, or suitable resilient member as known in the art. In other exemplary embodiments, actuator 351 is attached to seal block 352 and a resilient member such as a flexible mat and/or spring element 357 forces both actuator 351 and seal block 352 toward an open position.
    [058] The seal block 352 may include at least a portion of soft or resilient material so that at least a portion of the seal block 352 can flex or compress upon contact with the seal surface 346. At least a portion of the seal block 352 can be rigid or semi-rigid such that force from actuator 351 can be transmitted to the entire portion of seal block 352 that contacts sealing surface 346. Excessive bending of seal block 352 when actuator 351 moves the block seal 352 to a closed position can result in gaps between the seal block 352 and the sealing surface 346 that can allow air to enter and inhibit the performance of an accurate negative pressure fit check.
    [059] Figures 4a and 4b illustrate an exemplary embodiment of a shut-off valve 450 having a rotating seal block and a rotary actuator. Similar to the respiratory protective device 100 described above with reference to Figures 1a to 1d, the shut-off valve 450 may be incorporated into a respiratory protective device including a first chamber 421 and a breathing air zone defined by a second chamber 422, for example. In an exemplary embodiment, the first and second chambers 421, 422 are separated by an inner wall 424 including the inflow fluid communicating member 440. The inflow fluid communicating member 440 comprises one or more openings for providing communication fluid between the first and second chambers 421, 422. The fluid inflow communicating component 440 may include an inhalation valve to selectively allow fluid communication between the first and second chambers 421, 422. In an exemplary embodiment, the fluid inflow communication component 440 includes a diaphragm or flap (not shown) so that air can drain into the second chamber from the first chamber during inhalation, but prohibits the passage of air from the second chamber to the first chamber, as described above with reference to fluid inflow communicating member 140 for example.
    [060] In an exemplary embodiment, the shutoff valve 450 includes a rotary actuator 451 and a seal block 452. In a closed position, the seal block 452 contacts the inner wall 424 to block the inhalation port 441 to prevent fluid communication between the two or more sources of breathing air and the breathing air zone defined by the second chamber 422. When shut-off valve 450 is in a closed position, air from the breathing air source components (not shown) is in fluid communication with the first chamber 421 but is prevented from entering the breathing air zone defined by the second chamber 422 through the fluid inflow communicating member 440. In an exemplary embodiment, the sealing block 452 contacts a sealing surface 446 surrounding inhalation port 441. Sealing surface 446 may be in the form of a ridge or projection extending outwardly from inner wall 424 to allow a suitable seal is obtained around a periphery of the inhalation port 441.
    [061] Shut-off valve 450 can be operated to switch between an open position (Figure 4a) and a closed position (Figure 4b). In an exemplary embodiment, actuator 451 is a rotary actuator that can be rotated between a first position and a second position. When rotary actuator 451 is in a first position, shutoff valve 450 is in an open position, and when rotary actuator 451 is in a second position, shutoff valve 450 is in a closed position. In an exemplary embodiment, rotary actuator 451 is rotated 90 degrees between an open position and a closed position. In other exemplary embodiments, rotary actuator 451 is rotated 45 degrees, 180 degrees, or other suitable angle, between an open position and a closed position. Rotary actuator 451 includes a cam 458. Rotation of rotary actuator 451 causes cam 458 to push seal block 452 toward sealing surface 446 and revolve at pivot location 459 until seal block 452 makes contact with sealing surface 446. In a closed position shown in Figure 4b, sealing block 452 is in sealing engagement with sealing surface 446 to prevent air from passing through inhalation port 441. At least a portion of sealing block 452 may be flexed and/or compressed due to force applied to actuator 451, and such flexing and/or compression facilitates proper sealing. In an exemplary embodiment, the rotary actuator 451 returns to an open position due to the resilient member (not shown) when the rotary actuator is released by a user. The resilient member may be a torsion spring, for example, or other suitable resilient member as known in the art. In other exemplary embodiments, the rotary actuator 451 returns to an open position only after further input by a user and remains in the second position, so that the shut-off valve 450 is in a closed position, until the user rotates the actuator 451 to the first position, for example. A spring member 457 forces the sealing block 452 into an open position. Spring member 457 may comprise any spring suitable for urging sealing block 452 into an open position including a coil spring, spring bundle, elastomeric band, or suitable resilient member as known in the art.
    [062] The seal block 452 may include at least a portion of soft or resilient material so that at least a portion of the seal block 452 can flex or compress upon contact with the seal surface 446. At least a portion of the seal block 452 can be rigid or semi-rigid such that force from actuator 451 can be transmitted to the entire portion of sealing block 452 that contacts sealing surface 446. A rotary actuator 451 capable of rotating through a predetermined angle between a open and closed position and having a cam 458 which causes the sealing block 452 to move to a closed position which results in a uniform force transmitted to the sealing block 452 each time the sealing block 452 is moved to a closed position. In this way, an appropriate force to create a desired seal is easily and consistently achieved.
    [063] The rotary actuator is believed to provide several advantages, including ease of use and less effect on the fit of a mask body while performing a negative pressure fit check. Rotation of a rotary actuator does not require a force in one direction to a wearer's face and therefore cannot alter the natural contact between a mask body and the wearer's face. Consequently, an accurate negative pressure fit check can be obtained.
    [064] Figures 5a to 5c illustrate an exemplary respiratory protective device 500 that can cover the nose and mouth and provide breathing air to a wearer. Respiratory protective device 500 includes a mask body 520 including first and second inlet ports 503 and 504. The first and second breathing air source components (not shown) may be positioned on opposite sides of the mask body 520. In an exemplary embodiment, the first and second components of the breathing air source are filter cartridges configured to be attached to the first and second inlet ports 503 and 504. The filter cartridges filter incoming air from the outside environment. before the air passes into the interior space within the mask body for application to a wearer.
    [065] The mask body 520 may include a rigid or semi-rigid portion 520a and a malleable face contacting portion 520b. The malleable face contacting portion of the mask body is compliantly formed to allow the mask body to be comfortably supported over the nose and mouth and/or to provide an adequate seal with the wearer's face to limit entry. unwanted air into the mask body 520, for example. The face contact element 520b may have an inward facing cuff so that the mask can fit comfortably and securely over the wearer's nose and against the wearer's cheeks. The rigid or semi-rigid portion 520a provides structural integrity to the mask body 520 so that it can properly support breathing air source components, such as filter cartridges, for example. In various exemplary embodiments, mask body portions 520a and 520b may be provided integrally or as separately formed portions that are subsequently permanently or removable joined together.
    [066] An exhalation port 530 allows air to be purged from an interior space within the mask body during exhalation by a wearer. In an exemplary embodiment, the exhalation port 530 is located centrally on the mask body 520. An exhalation valve is mounted on the exhalation port to allow air to escape, due to the positive pressure created within the mask body 520 upon exhalation, but prevents the entry of external air.
    [067] The first and second inlet ports 503, 504 are configured to receive the first and second components of the breathing air source. In an exemplary embodiment shown in Figure 5a, mask body 520 includes first and second inlet ports 503, 504 on each side of mask body 520, and may be adjacent to cheek portions of mask body 520. the second inlet ports 503, 504 include complementary coupling features such that the first and second components of the breathing air source (not shown) can be securely attached to the mask body 520. Other suitable connections can be provided as is. known in the art. The coupling features may result in a removable connection so that the breathing air source components can be removed and replaced at the end of the breathing air source component's life or if the use of an air source component different breathable is desired. Alternatively, the connection may be permanent so that the breathing air source components cannot be removed without damage to the breathing air source component, for example.
    [068] The respiratory protective device 500 includes a shut-off valve 550 to close off multiple fluid inflow communication components. In an exemplary embodiment, shutoff valve 550 is operable between a closed position and an open position. In a closed position, shutoff valve 550 prevents fluid communication between both breathing air source components at inlet ports 503 and 504 and a mask body breathing air zone 520.
    [069] Stop valve 550 allows a user to perform a negative pressure fit check to provide an indication of the presence of leaks around a periphery of the mask body. When the shut-off valve 550 is in a closed position, air is prevented from entering a breathing air zone of the mask body 520. Inhalation by a user while the shut-off valve is in a closed position will result in negative pressure within the mask, and in some exemplary embodiments, can cause a pliable face contact element to deflect inwardly if a proper seal has been achieved between the mask body and the wearer's face. If a proper seal is not achieved, inhalation may result in air from the outside environment entering the breathing air zone between the periphery of the mask body and the wearer's face. In this way, a negative pressure fit check can easily be performed by a user wearing the respiratory protective device 500 to determine if an adequate seal is achieved between the respiratory protective device 500 and the face and/or head of the patient. user.
    [070] The first and second components of the breathing air source, such as filter cartridges, can be attached to the first and second inlet ports 503, 504. Consequently, air entering the mask body 520 through the first outlet port inlet 503 after passing through a first breathing air source component may enter the breathing air zone 522 through the first fluid inflow communication component 540a, and the air entering the mask body 520 through the second inlet port 504 after passing through a second component of the breathing air source, it may enter the breathing air zone 522 through the second fluid inflow communicating component 540b. Air from the first and second breathing air sources 501, 502 thus enters the breathing air zone 522 through separate fluid inflow communication components 540a, 540b. The first and second fluid inflow communication components 540a, 540b each comprise one or more openings for providing fluid communication between the first and second inlet ports 503, 504 and the breathing air zone 522. The first and the second fluid inflow communication components 540a, 540b may include an inhalation valve to selectively allow fluid communication between the first and second inlet ports 503, 504 and the breathing air zone 522.
    [071] In an exemplary embodiment, the shutoff valve 550 includes an actuator 551 and first and second seal blocks 552a, 552b. When the actuator is pressed, the first and second sealing blocks 552a, 552b block the first and second inhalation ports to prevent fluid communication between the two or more sources of breathing air and the breathing air zone 522. In one embodiment For example, the first and second seal blocks 552a, 552b include actuation surfaces 547a, 547b contacted by actuator 551 to cause seal blocks 552a, 552b to block the first and second inhalation ports. In an exemplary embodiment, sealing blocks 552a, 552b contact first and second sealing surfaces 546a, 546b that surround first and second inhalation ports 541a, 541b, respectively. The sealing surfaces 546a, 546b may be in the form of a ridge or projection extending outwardly from an inner surface of the mask body 520 or from the first and second fluid inflow communicating components 540a, 540b to allowing a proper seal to be obtained around a periphery of the inhalation ports 541a and 541b.
    [072] Shut-off valve 550 can be operated to switch between an open position (Figure 5b) and a closed position (Figure 5c). In an exemplary embodiment, actuator 551 is a button, such as an overmolded elastomeric push-button, slider, or the like, that can be pressed inward by a user to cause the first and second seal blocks 552a, 552b to revolve over locations 559a, 559b (not shown) until the first and second sealing blocks 552a, 552b contact the sealing surfaces 546a, 546b of the first and second fluid inflow communication components 540a, 540b. In an open position shown in Figure 5b, air may pass through the inhalation ports 541a, 541b into the breathing air zone 522 if allowed by the diaphragm or flap (not shown). In a closed position shown in Figure 5c, the sealing block 552a is in sealing engagement with the sealing surface 546a to prevent air from passing through the inhalation port 541a. When actuator 551 is released by a user, actuator 551 returns to an open position due to a resilient member which forces actuator 551 into an open position. In some exemplary embodiments, as described above with respect to shut-off valve 150 for example, shut-off valve 550 may remain in a closed position due to negative pressure within the mask until the wearer exhales or pressure within the of breathable air 522 is no longer greater than the strength of the resilient member.
    [073] In an exemplary embodiment, the actuator 551 in the form of an elastomeric button acts as a resilient member that forces the actuator 551 towards an open position. Actuator 551 may include a flexible mat 556 attached to an outer wall 523 of mask body 520 to support actuator 551 and/or force shut-off valve 550 into an open position. Flexible mat 556 is formed of a flexible or malleable material that is capable of elastically deforming when actuator 551 is pressed inward by a user, as shown in Figure 5c, for example. In a closed position, the flexible mat 556 is flexed and/or deformed causing the sealing blocks 552a, 552b to revolve as they come into contact with the actuation tabs 547a, 547b, for example. Bending and/or deformation of the elastomeric mat is desirably limited to the elastic regime so that the elastomeric mat is capable of repeatedly returning to an original configuration in which the shut-off valve is in an open position.
    [074] In an exemplary embodiment, the actuator 551 is attached to the mask body 520 so that a seal is formed between the actuator 551 and the mask body 520. For example, a portion of the actuator 551 may be joined to the mask body 520. mask 520 to provide a proper seal, for example by overmolding. Other suitable sealing can be provided through the use of gaskets, flanges, adhesives, interference fits, molding techniques, sonic welding, and other suitable techniques as known in the art. An adjacent actuator with sufficient seal 551 prevents entry of unfiltered air from the outside environment when a shut-off valve 550 is in the open, closed or intermediate position.
    [075] Other resilient members may be provided in place of, or in addition to, a flexible sleeve of actuator 551. In some exemplary embodiments, actuator 551 is not attached to seal blocks 552a, 552b. A resilient member such as flexible mat 556 forces actuator 551 into an open position and one or more additional members such as spring elements 558a, 558b force seal blocks 552a, 552b into an open position. Spring elements 558a, 558b may comprise any spring suitable for urging seal blocks 552a, 552b into an open position including a coil spring, spring bundle, elastomeric band, or suitable resilient member as known in the art. In some exemplary embodiments, actuator 551 is attached to seal blocks 552a, 552b and a resilient member such as a flexible mat and/or one or more spring elements 558a, 558b force both actuator 551 and seal blocks 552a, 552b toward to an open position.
    [076] A respiratory mask in accordance with the present disclosure provides several advantages. A shut-off valve operable between a closed position and an open position allows a user to easily perform a negative pressure fit test. A shut-off valve that closes the air intake ports, for example, is believed to provide a more effective and reproducible fit check to verify the presence of a proper seal between a mask periphery and the face of the mask. user compared to previous positive pressure adjustment devices. A respiratory mask in accordance with the present disclosure, therefore, can provide a solution for closing inlet valves that have been inaccessible and not easily closed, in many prior art devices, for example. Respiratory masks, as described above, allow a negative pressure fit test to be performed by a single stop valve, even though the mask may include more than one breathing air source component or more inlet ports, and does not need of a user to engage multiple actuators or perform individual tests for each inlet port or breathing air source components, for example. A shut-off valve, as described herein, may be suitable for half-face respirators, full-face respirators, positive-pressure or motor-equipped respirators, and other suitable respiratory protective devices.
    [077] The detailed description and examples presented above have been provided for the sake of clarity only. No unnecessary limitations are to be understood from this. It will be apparent to those skilled in the art that many changes can be made to the described embodiments without departing from the scope of disclosure. Any feature or feature described with respect to any of the above embodiments may be incorporated individually or in combination with any other feature or feature, and they have been presented in the above order and combinations for clarity only. Thus, the scope of the present disclosure should not be limited to the exact details and structures described herein, but rather to the structures described by the language of the claims and equivalents of those structures.
    权利要求:
    Claims (10)
    [0001]
    1. Breathing mask CHARACTERIZED in that it comprises: a mask body (120) defining a breathing air zone (122) for a user and having one or more inlet ports (103, 104) configured to receive one or more components the source of breathing air (101, 102); and a shut-off valve (150) operable between a closed position and an open position, the shut-off valve (150) comprising an actuator (151) and a resilient member, the actuator (151) being secured to the mask body (120). such that a seal is formed between the actuator (151) and the mask body (120) in both the open and closed positions and being engageable by the user to move the shut-off valve (150) to the closed position, the resilient member forcing the shut-off valve (150) to the open position from the closed position in the absence of a force applied by the user; wherein, in the closed position, the shutoff valve (150) is configured to prevent fluid communication between the one or more inlet ports (103, 104) and the breathing air zone (122), wherein the shutoff valve (150) in the closed position is configured to achieve a negative pressure within the breathing air zone (122) upon inhalation by the user.
    [0002]
    2. Respiratory mask, according to claim 1, CHARACTERIZED in that the mask body (120) comprises two or more inlet ports (103, 104) configured to receive two or more components of the breathing air source (101) , 102), and wherein, in the closed position, the shutoff valve (150) is configured to prevent fluid communication between the two or more components of the breathing air source (101, 102) and the breathing air zone (122). ).
    [0003]
    3. Respiratory mask, according to claim 1, CHARACTERIZED by the fact that the shut-off valve (150) in the closed position is configured to provide an indication of the presence of leaks around a periphery of the mask body (120) upon inhalation by the user.
    [0004]
    4. Respiratory mask, according to claim 3, CHARACTERIZED by the fact that the indication is greater difficulty in inhalation.
    [0005]
    5. Respiratory mask, according to claim 3, CHARACTERIZED by the fact that the mask body (120) further comprises a portion in contact with the malleable face and the indication is an inward deflection of the portion in contact with the malleable face .
    [0006]
    6. Breathing mask, according to claim 1, CHARACTERIZED by the fact that the stop valve (150) is in the closed position when the actuator (151) is pressed.
    [0007]
    7. Breathing mask, according to claim 6, CHARACTERIZED by the fact that the actuator (151) comprises a button that includes a flexible blanket (156).
    [0008]
    8. Breathing mask, according to claim 7, CHARACTERIZED by the fact that the flexible blanket (156) forces the actuator (151) to an open position corresponding to the stop valve (150) in the open position.
    [0009]
    9. Breathing mask CHARACTERIZED in that it comprises: a mask body (120) defining a breathing air zone (122) for a user and having one or more inlet ports (103, 104) configured to receive one or more components the source of breathing air (101, 102); and a shut-off valve (150) operable between a closed position and an open position, the shut-off valve (150) comprising an actuator (151) being user-engageable to move the shut-off valve (150) to the closed position; wherein, in the closed position, the shutoff valve (150) is configured to prevent fluid communication between the one or more inlet ports (103, 104) and the breathing air zone (122), and wherein, when the mask body is positioned for use on a user, the shut-off valve (150) in the closed position is configured to achieve negative pressure upon inhalation by the user, and wherein the shut-off valve (150) is configured to remain in the closed position due to negative pressure in the breathing air zone (122).
    [0010]
    10. Breathing mask CHARACTERIZED in that it comprises: a mask body defining a breathing air zone (122) for a user and having two or more inlet ports (103, 104) configured to receive two or more components of the source of breathing air (101, 102); and a shut-off valve (150) operable between a closed position and an open position, wherein the shut-off valve (150) comprising an actuator (151) being engageable by the user to move the shut-off valve (150) to the closed position ; wherein, in the closed position, the shutoff valve (150) is configured to prevent fluid communication between the two or more inlet ports (103, 104) and the breathing air zone (122), and wherein the shutoff valve The shutoff (150) in the closed position is configured to achieve negative pressure within the breathing air zone (122) upon inhalation by the user to provide an indication of an adequate leak-free seal around a periphery of the mask body.
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    同族专利:
    公开号 | 公开日
    KR102146709B1|2020-08-21|
    US20140216474A1|2014-08-07|
    AU2014212793B2|2016-08-18|
    EP2950894A2|2015-12-09|
    US9950202B2|2018-04-24|
    JP2016511660A|2016-04-21|
    AU2014212793A1|2015-08-13|
    CN104955529A|2015-09-30|
    RU2015132169A|2017-03-06|
    WO2014120500A2|2014-08-07|
    CN104955529B|2018-07-17|
    RU2629524C2|2017-08-29|
    KR20150114542A|2015-10-12|
    JP6395729B2|2018-09-26|
    WO2014120500A3|2014-11-20|
    BR112015018256A2|2017-07-18|
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    法律状态:
    2018-11-13| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-03-24| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-07-13| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2021-10-19| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-12-28| B09W| Correction of the decision to grant [chapter 9.1.4 patent gazette]|Free format text: RETIFICACAO |
    2022-01-04| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 20/01/2014, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/757,373|US9950202B2|2013-02-01|2013-02-01|Respirator negative pressure fit check devices and methods|
    US13/757373|2013-02-01|
    PCT/US2014/012190|WO2014120500A2|2013-02-01|2014-01-20|Respirator negative pressure fit check devices and methods|
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