FIELD: breathing masks or helmets.
SUBSTANCE: present invention relates to gas mask equipment, to parts of gas masks. Modular adapter for the front part of the “МБ – 2” of filtering gas mask “ПМК – 3” contains a nut with an outer diameter of 59.5 mm and height of 10.5 mm, on the outer side of which there are trapezoidal projections, and containing an internal thread with a nominal thread diameter of 47 mm and a thread pitch of 2 mm, replaceable nozzle consisting of a side, a rubber petal of inhalation, an attachment for a rubber petal of inhalation, a gasket made of an annular shape and a rectangular cross-section, with inner diameter of 27 mm, outer diameter of 40 mm and thickness of 2 mm, nozzle body, in which there is an internal thread with a nominal thread diameter of 40 mm, a thread pitch of 4 mm, a thread rounding radius of 1.25 mm, the smallest inner diameter of 38.41 mm, the largest inner diameter of 38.06 mm and the smallest outer diameter of 40.06 mm, and an external thread with a nominal thread diameter of 47 mm and a thread pitch of 2 mm, by means of which the replaceable nozzle has the possibility of a threaded connection with said nut, replaceable nozzle consisting of a side, a rubber petal of inhalation, an attachment for a rubber petal of inhalation, a gasket made of an annular shape and a rectangular cross-section, with inner diameter of 27 mm, outer diameter of 40 mm and thickness of 2 mm, nozzle body, in which there is an internal thread with a thread pitch of 3.629 mm, a thread rounding radius of 1.225 mm, a thread profile height of 0.8 mm, the smallest inner diameter of 38.56 mm, the largest inner diameter of 38.86 mm, the smallest outer diameter of 40.16 mm, and an external thread with a nominal thread diameter of 47 mm and a thread pitch of 2 mm, by means of which the replaceable nozzle has the possibility of a threaded connection with said nut, replaceable nozzle with a vertical through channel, consisting of a side, a rubber petal of inhalation, an attachment for a rubber petal of inhalation, a gasket made of an annular shape and a rectangular cross-section, with inner diameter of 19 mm, outer diameter of 40 mm and thickness of 2 mm, nozzle body, on which there is an external thread with a nominal thread diameter of 47 mm and a thread pitch of 2 mm, by means of which the replaceable nozzle has the possibility of a threaded connection with said nut, and an external bayonet mount in the form of a circle with an outer diameter of 21 mm, an inner diameter of 15 mm and three trapezoidal projections, two of which have width of 7 mm in the widest part of the projections, and the third projection has width of 5 mm in its widest part, wherein the height of all three protrusions is 3 mm relative to the outer diameter of the bayonet attachment, a replaceable nozzle with a vertical through channel, consisting of a collar, a rubber petal for inhalation, an attachment for a rubber petal for inhalation, ring-shaped gasket with rectangular cross-section, with inner diameter of 25 mm, outer diameter of 42 mm and thickness of 2 mm, nozzle body, on which there is an external thread with a nominal thread diameter of 47 mm and a thread pitch of 2 mm, by means of which the replaceable nozzle has the possibility of a threaded connection with said nut, and an external bayonet mount, which is a circle with an outer diameter of 25 mm, with an inner diameter of 18.5 mm with three trapezoidal projections, two of which have width of 7 mm in the widest part of the projections, and the third projection has width of 5.5 mm in its widest part, wherein height of all three projections makes 3 mm relative to outer diameter of bayonet mount.
EFFECT: providing a safe and tight connection between the front part of the filtering gas mask and filters having an external threaded attachment with a thread diameter of 40 mm and thread parameters corresponding to the requirements of GOST 8762-75, or an external threaded fastener with a thread diameter of 40 mm and thread parameters corresponding to the requirements of EN 148-1:1999 standard, or internal bayonet connections of 3M, JETA SAFETY standard and their analogues, or internal bayonet connections of MSA, UNIX standard and their analogues.
1 cl, 14 dwg
