FIELD: gas mask technology.
SUBSTANCE: present invention relates to gas mask technology, to the details of gas masks, full-face masks and half masks. Rubber corrugated tube for mounting on the front of the MB – 2 filter gas mask PMK – 3 is formed by a rubber corrugator, a corner adapter, a nipple assembly, a cap nut with a rubber nipple ring and a nut, and an angle adapter is connected from the upper connecting part of the rubber corrugator, and a cap nut with a rubber nipple ring and the nipple assembly itself is connected from the lower side of the connecting part of the rubber corrugator. The thread has a diameter of 46 mm and a thread pitch of 2 mm and is equipped with an inhalation petal mounted in an inhalation petal mount, the cap nut is made with a round internal thread with a nominal diameter of 40 mm, a thread pitch of 4 mm, a radius of curvature of 1.25 mm, the smallest inner diameter of 38.41 mm, the largest inner diameter of 38.06 mm, the smallest outer diameter of 40.06 mm, inside the cap nut there is a hole for connecting to a nipple made in the form of a hollow cylinder at the end of the upper base which has a thickening in the form of a circle, and the lower base of the cylinder is connected to a ring, which is connected to a rubber nipple ring, The nut is made with an internal thread with a nominal diameter of 46 mm and a thread pitch of 2 mm, allowing it to be threaded with the corresponding external thread of the angle adapter, and trapezoidal projections are located on the outside of the nut.
EFFECT: ensuring a safe and hermetic connection between the front part of the filter compartment with a threaded filter attachment having an external thread with a diameter of 40 mm and thread parameters conforming to the requirements of GOST 8762-75.
2 cl, 6 dwg
