| 摘要 |
FIELD: medicine. ^ SUBSTANCE: respirator includes mask with case featuring fitting unit for connection of clean air source, such as filter. Fitting unit has threaded part. Clean air source has another threaded part matching the thread of previous threaded part. First and second threaded parts feature device for connection to each other over a thread with larger pitch. First and second threaded parts have latch combined with thread. Locker prevents clean air source twist against the mask case when connected to it. ^ EFFECT: connection of clean air source to mask case with minimum rotation, the user employing only one hand to connect or disconnect clean air source element without taking respirator off face. ^ 11 cl, 7 dwg |
