Patent ID: 9724484
Date: 2017-08-08
CPC Classifications: A61M,A62B

Claim:
1. A breathing apparatus comprising: a source of compressed air; a lung demand valve that receives compressed air from said source; a pneumatic valve assembly connected between the source and the lung demand valve, said pneumatic valve assembly being moveable between a first closed position that prevents a flow of compressed air to the lung demand valve and a second open position that provides a path for compressed air to flow to the lung demand valve; a mask that receives the lung demand valve therein, said mask providing the compressed air to a user, the mask having a first operational mode providing filtered ambient air to the user and a second operational mode providing compressed air to the user; and a control device coupled to the pneumatic valve assembly, said control device detecting a condition in air surrounding the apparatus and controlling the pneumatic valve assembly to move between the first closed and second open position and the mask to operate in a respective one of said first and second operational modes, wherein said lung demand valve includes: