AIRCRAFT CREW MEMBER PROTECTIVE BREATHING APPARATUS

摘要

A self-contained breathing device for use in fighting fires comprising a hood for covering a wearer's head, a membrane for sealing the hood to create a breathing chamber inside the hood, and a source of oxygen disposed inside the hood. The source of oxygen is connected to the user by a conduit inside of the hood, and another conduit directs user-exhaled carbon dioxide to the source of oxygen. The breathing device includes a visual indicator inside of the hood that reacts to the presence of a gas within the hood and provides visual feedback to the user based on a quantity of the gas present in the hood.

主权项

1. A breathing apparatus comprising:
a hood and a self-contained oxygen source inside the hood, the self-contained oxygen source located behind the user's head; a first tube connecting the self-contained oxygen source and terminating at a position above the user's head for delivering oxygen to a breathing area; a second tube connecting a user's mouth piece to the self-contained oxygen source; a transparent viewing window on the hood; and a first internal indicator on the transparent viewing window and facing the user inside the hood that indicates to the user that the self-contained oxygen source behind the user's head is providing a threshold oxygen level inside the breathing chamber at the breathing area.