HYBRID SELF-RESCUE EQUIPMENT

摘要

Described herein is a safety breathing apparatus (5) having a delivery element configured to deliver respirable gas to a respiratory system of a user. The apparatus includes a breathing hose (25) in fluid communication with a first source of respirable gas (15). A valve housing (85) includes a first port (145)configured to be coupled to the delivery element, a second port configured to be coupled to the breathing hose, and a third port (14) configured to dock with a second source of respirable gas (115) without exposing the user to a surrounding atmosphere.