Apparatus Having Cross Conditioned Breathing Air
First Claim
1. A self-contained breathing apparatus comprising:
- a tank of a compressed gas;
a face mask; and
a coaxial conduit that extends between the tank and the mask with a first portion of the conduit defining a flow path from the tank to the mask and where a second portion of the conduit defines a second flow path from the mask, the first flow path being at least in part surrounded by the second path.
1 Assignment
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Accused Products
Abstract
A self-contained breathing apparatus includes a tank of compressed air and an associated connector. A coaxial conduit extends from the connector to a face plate which might be used by a first responder. Air from the tank is coupled to the face plate via an internal conduit. Exhaled air from the face mask is carried away via an external conduit that surrounds the internal conduit, at least in part, and insulates the air being coupled to the face plate from ambient temperatures. The breathable air, flowing in the internal conduit also cools the exhaled air in the external conduit prior to that air flushing spaces between protective layers of the first responder'"'"'s coat.
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Citations
21 Claims
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1. A self-contained breathing apparatus comprising:
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a tank of a compressed gas; a face mask; and a coaxial conduit that extends between the tank and the mask with a first portion of the conduit defining a flow path from the tank to the mask and where a second portion of the conduit defines a second flow path from the mask, the first flow path being at least in part surrounded by the second path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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providing a first flow of breathable air; coupling the first flow to a breathing location; directing a second flow of air from the breathing location, while separating the flows and simultaneously cooling the second flow with the first flow; and delivering the second flow to a flushing region. - View Dependent Claims (12, 13, 14, 15)
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16. A flush system for a protective garment comprising:
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a garment having a plurality of layers, a space being located between two of the layers; a first conduit that delivers gas from a source of compressed gas to a face mask; and a second conduit which surrounds the first conduit, for at least a predetermined interval, and that delivers gas from the mask to the space. - View Dependent Claims (17, 18, 19, 20)
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21. A flush system for a fire resistant protective garment comprising:
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a fire resistant protective garment having an exterior fire resistant surface and an interior surface; a first conduit that delivers gas from a source of compressed gas to a face mask; and a second conduit which surrounds the first conduit, for at least a predetermined interval, and that delivers gas from the mask to a region adjacent to the interior surface.
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Specification