RESPIRATOR HALF MASK Russian patent published in 2006 - IPC A62B18/02 

FIELD: different harmful industries; means of individual protection of the respiratory organs of people in harmful productions.

SUBSTANCE: the invention is pertaining to the means of individual protection of the respiratory organs of the working staff, in particular, to respirator half mask, and may be used in the cartridge respirators for protection against harmful vapors, gases and aerosols in conditions of the harmful productions. The respirator half mask contains the resilient body consisting of the nose part and the carrying part with the pads having holes for mounting the filtering cartridges and the conjugated with the body obturator interfaced a body with the band of obturation. The body contour in the frontal plane in the field of the obturator consists of four conjugating arcs of circumferences, and in the plane perpendicular to the frontal plane - from three conjugating arcs of circumferences. The angle of turn-down of the obturation band end is smoothly varies along the body contour or has the constant value in the chin part. The angle of turn-down of the obturation band end in respect to the frontal plane the half mask is smoothly increasing from the nose bridge up to the nose wings, further it is smoothly diminishing in the field of the nose wings and cheeks, and at the variable angle it is smoothly diminished in the chin part. The holes for fastening the filtering cartridges are made on the pads of the oval form, their centers are arranged on the equal spacing interval from each other on the generatrix of the contour of the body for all the sizes, which is determined according to the length of the generatrix for the first size of the half mask. The invention demonstrates the increased significance of the protective and ergonomic values and improved manufacturability and economic features of the respirator half mask.

EFFECT: the invention ensures the increased significance of the protective and ergonomic values and improved manufacturability and economic features of the respirator half mask.

2 cl, 3 dwg, 3 tbl