There is a requirement in the commercial aviation industry that the masks designed for crew usage be capable of donning in five seconds or less, be able to be donned over eyeglasses and be capable of supplying oxygen consistent with physiological demands at altitudes up to 40,000 feet. Description of Related Art In the course of aircraft operation, various personnel, including but not limited to pilots, navigation officers, and other flight crew personnel, may need a mask system to provide breathing oxygen and also to provide protection from smoke from onboard fires and other possible airborne eye and lung irritants which may enter the crew compartment(s). Field of the Invention This invention relates to face mask systems for protection from atmospheric pollutants and the supply of oxygen to the mask wearer and more particularly to mask systems to supply oxygen for use in oxygen-depleted environments during aircraft decompression, smoke from onboard fires, airborne debris or other toxic gases which may enter the aircraft flight deck or other crew compartments. A second preferred embodiment molds the lens and mask seal of a single material having sufficient optical quality and flexibility to accomplish both purposes. The regulator includes a valve for purging the condensation-prone moist gases from the lens area and provides positive pressure in the mask. The regulator controls the flow rate of oxygen to the wearer based on altitude and physiological requirements.

It is connected to an oxygen source and, optionally, with aircraft communications. The system is designed for required five-second donning with one hand and because of the flexible lens, is capable of storage in the relatively preferred on crowded flight decks. In one preferred embodiment, the mask system has a face seal, a soft flexible lens, a pneumatically-actuated harness, and a regulator with microphone to control the flow of oxygen and to facilitate communications in aircraft flight decks and other aircraft compartments. Deck duty has a quick-donning type of oxygen mask that the.Ī mask and harness system for use in providing breathing oxygen and protection from pollutants for the eyes and respiratory system as might be encountered in high altitude aviation environments.

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