A respiratory face mask includes a face mask and a breathing tube. The face mask includes a transparent mask. An outer edge of the transparent mask is double-layered and forms an exhaust passage. The exhaust passage is provided with an airflow inlet. The transparent mask is provided with a soft plastic cover that seals the exhaust passage. An inner bottom side of the soft plastic cover is provided with a breathing chamber. The periphery of the breathing chamber is sealingly pressed against an inner wall of the transparent mask by a fixing frame. The fixing frame is provided with an air-guiding groove that is in sealed communication with the airflow inlet, and an air-exit aperture that is in communication with the air-guiding groove. The air-exit aperture is provided with an air-exit one-way valve plate which is mounted on the fixing frame.


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    Title :

    RESPIRATORY FACE MASK


    Contributors:

    Publication date :

    2018-10-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B63C LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS , Zuwasserlassen, Trockenstellen, Docken oder Bergen von Schiffen



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