×

Lung demand valve

  • US 10,173,083 B2
  • Filed: 02/14/2014
  • Issued: 01/08/2019
  • Est. Priority Date: 03/01/2013
  • Status: Active Grant
First Claim
Patent Images

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.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×