Lung demand valve
First Claim
1. 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, one side of the diaphragm being exposed to ambient pressure;
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;
a whistle coupled to the body and extending from the inside to the outside of the body, the whistle having a whistle inlet disposed within the body and fluidically connected to the breathable gas inlet inside the body, and a whistle outlet disposed outside the body; and
a manifold disposed within the body and having at least three ports, wherein each port is fluidically connected to one of the valve inlet, breathable gas inlet and whistle inlet,wherein 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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Accused Products
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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Citations
19 Claims
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1. A lung demand valve, comprising:
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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, one side of the diaphragm being exposed to ambient pressure; 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; a whistle coupled to the body and extending from the inside to the outside of the body, the whistle having a whistle inlet disposed within the body and fluidically connected to the breathable gas inlet inside the body, and a whistle outlet disposed outside the body; and a manifold disposed within the body and having at least three ports, wherein each port is fluidically connected to one of the valve inlet, breathable gas inlet and whistle inlet, wherein 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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2. A lung demand valve, comprising:
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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, one side of the diaphragm being exposed to ambient pressure; 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 and having a whistle inlet fluidically connected to the breathable gas inlet inside the body and a whistle outlet disposed outside the body; wherein 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. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification