| 摘要 |
FIELD: respiratory organ protective equipment. SUBSTANCE: helmet-type gas mask is connected with air supply hose via elongate corrugated pipe. Air supply hose is made in the form of rubber-fabric sleeve reinforced with steel spiral and is secured on safety belt with shoulder straps. Filtering case is positioned at hose end. Casing is formed as pipe made from flexible material and arranged within hose. Casing wall thickness is 0.05-0.06 of hose inner diameter. Outer surface of casing is connected with inner surface of hose without space between them. EFFECT: increased efficiency, improved strength, prolonged service life and reduced weight. 2 dwgd |
