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Breathing equipment for aircrew

  • US 5,355,878 A
  • Filed: 02/22/1993
  • Issued: 10/18/1994
  • Est. Priority Date: 06/26/1990
  • Status: Expired due to Term
First Claim
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1. A facemask incorporating breathing equipment for use with an aircrew flying helmet comprising a rigid outer shell and a flexible face-piece, said flexible face-piece having a periphery adapted to make a seal with a pilot'"'"'s face, the face-piece incorporating an inspiratory and expiratory valve and the outer shell having means for attaching said outer shell at a fixed distance from the helmet, and extendable means located between the rigid shell and the face-piece, said extendable means to selectively press the periphery of the face-piece towards the pilot'"'"'s face to improve the seal therewith and means automatically operable in response to gas at a pressure above that required for normal breathing to reconfigure the extendable means to press the periphery of the face-piece toward the pilot'"'"'s face.

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