COMBINED EXHALE AND INLET VALVE FOR RESPIRATOR

摘要

A valve assembly (100) including a mask (106) end (104) and a supply end (102) is provided. The valve assembly (100) includes a housing assembly (120), an inhale valve (160), and an exhale valve (180). The housing assembly (120) defines a first air passageway (112) configured for inhalation (108) and a second air passageway (114) configured for exhalation (110). At least a portion of the second air passageway (114) is disposed peripherally around the first air passageway (112). The inhale valve (160) is configured to be biased to an open position when subject to a reduction in pressure due to inhalation, and to be biased to a closed position when subject to an increase in pressure proximate due to exhalation. The exhale valve (180) is configured to be biased to a closed position when subject to a reduction in pressure due to inhalation, and to be biased to an open position when subject to an increase in pressure due to exhalation.