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Mask with inhalation valve

  • US 20020170557A1
  • Filed: 05/06/2002
  • Published: 11/21/2002
  • Est. Priority Date: 05/08/2001
  • Status: Active Grant
First Claim
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1. A mask for use in inhaling a substance comprising:

  • a mask housing defining a chamber and having an inlet and an outlet communicating with said chamber; and

    an inhalation valve disposed in said inlet and integrally formed with said mask housing, wherein said valve and said mask housing are formed as a one-piece unit.

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