Respirator negative pressure fit check devices and methods
First Claim
Patent Images
1. A respiratory mask, comprising:
- a mask body defining a breathable air zone for a wearer and having two or more inlet ports configured to receive two or more breathing air source components; and
a shut-off valve operable between a closed position and an open position the shut-off valve comprising an actuator being engageable by the wearer to move the shut-off valve into the closed position;
wherein, in the closed position, the shut-off valve is configured to prevent fluid communication between the two or more inlet ports and the breathable air zone, and wherein the shut-off valve in the closed position is configured to achieve a negative pressure within the breathable air zone upon inhalation by the wearer to provide an indication of an adequate seal without leaks around a periphery of the mask body.
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Accused Products
Abstract
A respiratory mask body defining a breathable air zone for a wearer and having a shut-off valve is provided. In an exemplary embodiment, the mask body includes one or more inlet ports configured to receive one or more breathing air source components. The shut-off valve is operable between a closed position and an open position, and when in a closed position the shut-off valve prevents fluid communication between the one or more inlet ports and the breathable air zone and the shut-off valve returns to an open position in the absence of an applied force.
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Citations
34 Claims
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1. A respiratory mask, comprising:
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a mask body defining a breathable air zone for a wearer and having two or more inlet ports configured to receive two or more breathing air source components; and a shut-off valve operable between a closed position and an open position the shut-off valve comprising an actuator being engageable by the wearer to move the shut-off valve into the closed position; wherein, in the closed position, the shut-off valve is configured to prevent fluid communication between the two or more inlet ports and the breathable air zone, and wherein the shut-off valve in the closed position is configured to achieve a negative pressure within the breathable air zone upon inhalation by the wearer to provide an indication of an adequate seal without leaks around a periphery of the mask body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A respiratory mask, comprising:
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a mask body defining a breathable air zone for a wearer and having one 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, the shut-off valve comprising an actuator and a biasing member, the actuator being attached to the mask body such that a seal is formed between the actuator and the mask body in both open and closed positions and being engageable by the wearer to move the shut-off valve into the closed position, the biasing member biasing the shut-off valve to the open position from the closed position in the absence of an applied force by the wearer; wherein, in the closed position, the shut-off valve is configured to prevent fluid communication between the one or more inlet ports and the breathable air zone, wherein the shut-off valve in the closed position is configured to achieve a negative pressure within the breathable air zone upon inhalation by the wearer. - View Dependent Claims (28, 29, 30, 31)
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32. A respiratory mask, comprising:
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a mask body defining a breathable air zone for a wearer and having one 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, the shut-off valve comprising an actuator being engageable by the wearer to move the shut-off valve into the closed position; wherein, in the closed position, the shut-off valve is configured to prevent fluid communication between the one or more inlet ports and the breathable air zone, and wherein, when the mask body is positioned for use on the wearer, the shut-off valve in the closed position is configured to achieve a negative pressure upon inhalation by the wearer, and wherein the shut-off valve is configured to remain in the closed position due to the negative pressure in the breathable air zone. - View Dependent Claims (33, 34)
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Specification