RESPIRATOR Russian patent published in 2006 - IPC A62B7/10 A62B18/02 

FIELD: air cleaning equipment, in particular, respirators adapted for cleaning of air in working zone from vapors and aerosols of hazardous substances and serving as individual protection means used in carrying out of works connected with release of hazardous substances under domestic conditions.

SUBSTANCE: respirator has air-permeable face part made in the form of folded filtering half mask consisting of front and terminating layers of filtering materials, elastic headband and nose clip, said layers being arranged successively in the course of flow of air. Air-permeable face part is made in the form of equilateral trapezium, with ratio of small and large bases of said trapezium making 1:1.1-1.25. Filtering surface is made in the form of M-shaped fold with ratio of width of each generatrix of its inner surfaces to width of outer surfaces making 1:1.25-1.45. Layer of elastic sorption material is located between front and closing layers of elastic filtering materials.

EFFECT: improved quality of cleaning air by means of respirator, wider range of application, increased service life and enhanced reliability in operation.

5 dwg