Lung demand valve
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United States of America Patent
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Jan 8, 2019
Grant Date -
Jan 7, 2016
app pub date -
Feb 14, 2014
filing date -
Mar 1, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
There is disclosed a lung demand valve comprising: a body within which is disposed a diaphragm and a valve assembly having a valve inlet, the valve assembly and diaphragm arranged to cooperate to control the delivery of breathable gas to a user. There is also provided a breathable gas inlet fluidically connected to the valve inlet inside the body and arranged to be fluidically connected to a supply of breathable gas; and a whistle coupled to the body. The whistle has a whistle inlet fluidically connected to the breathable gas inlet inside the body and a whistle outlet disposed outside the body. In use, when the pressure of the breathable gas in the breathable gas inlet is less than a threshold, breathable gas flows from the breathable gas inlet through the whistle inlet and outlet thereby causing the whistle to sound outside of the body.
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