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Device and method for a protective mask

  • US 20070017509A1
  • Filed: 05/18/2004
  • Published: 01/25/2007
  • Est. Priority Date: 06/03/2003
  • Status: Abandoned Application
First Claim
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1. A device for a protective mask comprising means for detecting that a protective-mask user is breathing through the breathing filter of the protective mask, wherein the means for detecting protective-mask use comprise a pressure difference sensor arranged to measure a pressure difference between the pressure in the protective mask and the ambient pressure, and in that a processing unit connected to the pressure difference sensor is arranged so as to compare the pressure difference values with a reference pattern for a breath in order to determine whether the pattern of the pressure changes agrees with the reference pattern.

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