James W. Teetzel,Gary M. Lemire,Daniel A. Desrosiers,Mark A. Hansen
申请号：
US14600719
公开号：
US10130831B2
申请日:
2015.01.20
申请国别(地区):
US
年份:
2018
代理人:
摘要：
A breathing apparatus is operable in self-contained and filtered modes of operation. In the self-contained mode of operation, a breathable gas is delivered to a user from a self-contained source of breathing gas. In a second, filtered mode of operation, a suction source draws ambient air through a filter removing contaminants and delivers filtered ambient air to the user. A method of delivering air to a subject is also provided.
