Breathing Apparatus and Method of Use
First 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.
3 Assignments
0 Petitions
Accused Products
Abstract
A breathing apparatus includes a source of compressed air and a lung demand valve that receives compressed air from the source. A pneumatic valve assembly is connected between the source and the lung demand valve. The pneumatic valve assembly is 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 receives the lung demand valve therein. The mask provides the compressed air to a user and having a first operational mode providing filtered ambient air to the user and a second operational mode providing compressed air to the user. A control device is coupled to the pneumatic valve assembly. The control device detects a condition in the 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 the first and second operational modes.
8 Citations
64 Claims
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1. A breathing apparatus comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 64)
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20-63. -63. (canceled)
Specification