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METHOD AND APPARATUS FOR VENTILATION ASSISTANCE

  • US 20100101575A1
  • Filed: 12/13/2007
  • Published: 04/29/2010
  • Est. Priority Date: 12/13/2006
  • Status: Abandoned Application
First Claim
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1. A mask interface device for a protective mask of the type having a mask filter and a mask expiratory port, the mask expiratory port having an expiratory port valve of the type that is normally closed and openable upon expiration, the mask filter having an inspiratory air inlet, the mask interface device comprising:

  • (a) an air pressure generating assembly comprising an air pressure generator in fluid communication with the inspiratory inlet of the mask filter; and

    (b) an expiratory port interface assembly mountable to the mask expiratory port and comprising;

    (i) at least one opening for venting expired gas to atmosphere;

    (ii) a one-way valve that is positioned to control the flow of expired gas out through the at least one opening; and

    (iii) an air-pressure measuring device that is positioned to enable the pressure of gas exiting the expiratory port valve to be measured;

    and wherein the one-way valve that is set to open at an opening pressure that is equal to or greater than the expiratory port valve opening pressure.

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