Breathing equipment for aircrew

A - Human Necessities – 62 – B

Patent

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Details

A62B 18/08 (2006.01) A62B 18/04 (2006.01)

Patent

CA 2134469

A breathing apparatus for aircrew comprising a rigid outer shell (4) in which a flexible face-piece (3) is received whose periphery is adapted to make a seal with the pilot's face. The face-piece incorporates an inspiratory and expiratory valve and the outer shell has means (5,32) for attaching it at a fixed distance from the wearer's face. The face-piece also includes extendable means (20) a bladder (30) automatically operable to press the periphery of the face-piece (3) towards the pilot's face to improve the seal therewith when gas at a pressure above that required for normal breathing is supplied to the facemask, the extendable means reconfiguring as a result thereof. Transparent viewing means (31) are either mounted on the rigid outer shell (4) in the wearer's line of sight or can be formed as a viewing window (31) incorporated in a flexible NBC hood (30) or a full face protective helmet.

Un appareil respiratoire pour un membre d'équipage navigant comprenant une coquille extérieure (4) rigide dans laquelle se trouve un masque (3) flexible dont la périphérie s'adapte à la figure du pilote pour créer un joint étanche. Le masque comprend une valve d'inspiration et d'expiration, et la coquille extérieure présente des moyens (5, 32) de le fixer à une distance fixe du visage de celui qui le porte. Le masque comprend aussi un dispositif extensible (20), une vessie (30) qui peut être automatiquement utilisée pour appuyer la périphérie du masque (3) sur la figure du pilote afin d'améliorer le joint étanche ainsi formé lorsque du gaz à une pression supérieure de celle qui est nécessaire à la respiration normale est fourni au masque, le dispositif extensible se reconfigurant en conséquence. Un dispositif de vision transparent (31) peut être soit monté sur la coquille extérieure (4) rigide dans le champ de vision de celui qui porte le masque, soit formé comme une fenêtre de vision à même la cagoule (30) NBC flexible ou à même le casque protecteur intégral.

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