Emergency air system
First Claim
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1. An improved breathable air system comprising:
- a primary durable breathable air source;
a primary durable air delivery passageway extending from said primary air source operative for the passage of air from said primary source to a valved outlet;
means for controlling the flow of breathable air from said primary air source through said primary passageway at a defined primary passageway air pressure;
a secondary breathable air source;
a secondary passageway extending from said secondary air source and engaging in fluid communication with said primary passageway;
means for controlling the flow of breathable air from said secondary air source into said secondary passageway at a defined secondary air pressure which is less than said primary air pressure;
check valve means, positioned in said primary passageway between the point where the secondary passageway engages the primary passageway and the primary air source, said check valve means arranged for closing said primary passageway when fluid flow from said primary air source is at a pressure less than said defined secondary air pressure.
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Abstract
The present invention is an improved system and apparatus for providing emergency breathing air upon the failure or disconnect of a primary air source in a hostile environment. The invention comprises a compressed air source interconnected with a primary pressurized system which automatically engages when the primary air system falls below a predefined pressure range and isolates the secondary system from the primary system.
86 Citations
20 Claims
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1. An improved breathable air system comprising:
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a primary durable breathable air source; a primary durable air delivery passageway extending from said primary air source operative for the passage of air from said primary source to a valved outlet; means for controlling the flow of breathable air from said primary air source through said primary passageway at a defined primary passageway air pressure; a secondary breathable air source; a secondary passageway extending from said secondary air source and engaging in fluid communication with said primary passageway; means for controlling the flow of breathable air from said secondary air source into said secondary passageway at a defined secondary air pressure which is less than said primary air pressure; check valve means, positioned in said primary passageway between the point where the secondary passageway engages the primary passageway and the primary air source, said check valve means arranged for closing said primary passageway when fluid flow from said primary air source is at a pressure less than said defined secondary air pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A breathable air system, comprising a primary breathable air source in fluid connection with a first passageway and arranged for enabling the flow of air from said primary source to a valve controlled user outlet at a first defined pressure;
- a secondary breathable air source in fluid connection to said first passageway and arranged for enabling the flow of air from said secondary source at a second defined pressure which is less than said first defined pressure;
said flow of air from said secondary source being restrained from flowing through said first passageway by the greater defined pressure of said flow of air from said primary source. - View Dependent Claims (14, 15)
- a secondary breathable air source in fluid connection to said first passageway and arranged for enabling the flow of air from said secondary source at a second defined pressure which is less than said first defined pressure;
- 16. The combination comprising a face mask having a valved outlet enabled for delivery of breathable air upon respiratory demand from a primary breathable air source to a user wearing said mask and a segregate valved inlet arranged for enabling the flow of ambient air to said user wearing said mask and controllable by said user.
Specification