William A. Mittelstadt,Carl W. Raines, III,David R. Stein,Nathan A. Abel,David M. Blomberg,Michael J. Cowell,Gary E. Dwyer,Thomas I. Insley,Michael J. Svendsen
申请号：
US13757373
公开号：
US09950202B2
申请日:
2013.02.01
申请国别(地区):
US
年份:
2018
代理人:
摘要：
A respiratory mask body defining a breathable air zone for a wearer and having a shut-off valve is provided. In an exemplary embodiment, the mask body includes one or more inlet ports configured to receive one or more breathing air source components. The shut-off valve is operable between a closed position and an open position, and when in a closed position the shut-off valve prevents fluid communication between the one or more inlet ports and the breathable air zone and the shut-off valve returns to an open position in the absence of an applied force.
