| 摘要 |
<p>A configurable exhale system (10) for a respirator comprises a housing (12) having a chamber (20). A first valve assembly (14) is disposed within the chamber (20) and configured to prevent air from flowing through the first valve assembly (14) when an air pressure differential between an upstream side and a downstream side of the first valve assembly (14) is below a first opening pressure. A second valve assembly (16) is disposed within the chamber (20) in fluid communication with the first valve (assembly 14). The second valve assembly (16) is configured to prevent air from flowing through the second valve assembly (16) when an air pressure differential between an upstream side and a downstream side of the second valve assembly (16) is below a second opening pressure, which is greater than the first opening pressure. A bypass opening is positioned adjacent the second valve assembly (16), which bypass opening configured to enable air to bypass the second valve assembly (16), and a bypass member (62) is positioned adjacent the at least one bypass opening. The bypass member (62) is movable between first and second positions, wherein in the first position the bypass member blocks the at least one bypass opening, and wherein in the in the second position the bypass member does not block the at least one bypass opening.</p> |
