FIELD: fire-fighting means.
SUBSTANCE: filtration face respiratory mask 10 includes a mask base 12 and fastening belts 14. The mask base 12 contains a filter element 18 containing a filter bed, and a supporting frame 16. The supporting frame 16 contains a set of central transversally extended elements movable longitudinally, extended between the first side and the second side and convergent with each other on the first side 22 and on the second side 24 of the mask base 12. At least one transversally extended element 26 is movable longitudinally, extended between the first side and the second side and not attached to any longitudinally extended element (elements) which could prevent said transversally extended from a longitudinal travel.
EFFECT: more easy talking with the other persons at work, besides, a mask of the same size can fit to the persons of the different sizes.
21 cl, 7 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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|
RU2446845C1 |
| HORIZONTALLY FLAT-FOLD FILTER FACE RESPIRATORY MASK WITH INDICING SYMMETRY COMPONENT | 2010 |
|
RU2443442C1 |
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RU2436608C1 |
| FOLDABLE RESPIRATORY FACE MASK WITH EXHALATION VALVE | 2016 |
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RU2697606C1 |
| RESPIRATOR WITH INNER FOLD IN CLOSELY FITTING NASAL AREA | 2011 |
|
RU2586045C2 |
| FILTER FACE RESPIRATORY MASK WITH SHAPE-GENERATING FOAMING LAYER | 2010 |
|
RU2474445C2 |
