PANORAMIC GAS MASK Russian patent published in 2015 - IPC A62B18/00 

FIELD: life-saving equipment.

SUBSTANCE: invention relates to the panoramic gas mask. The mask comprises a housing with a shutter and panoramic cylindrical glass, an intercom located in front of the housing, an inhalation unit and an exhalation unit of a valve system closed by a protecting screen, a sub-mask with wings. According to the invention the housing is designed low-profile with such geometrical parameters, as the height H₁=240-260 mm, the mask axis arrangement with reference to the mask top H₂=130-160 mm, the maximum height H₃=70-80 mm and the minimum height H₄=25-35 mm of the panoramic glass viewing zone, the arrangement of inhalation units with reference to the mask axis is H₅=10-20 mm, the shutter height H₆=170-190 mm, the lowering of panoramic glass zone of the mask with reference to the top H₇=19-25 mm, the housing width B₁=156-166 mm, the width of the panoramic glass viewing zone B₂=145-155 mm, the distance between the centres of input cross sections of inhalation units B₃=100-120 mm, the housing depth is C₁=140-150 mm, elongation of the glass from the shutter frontal zone is C₂=14-20 mm, elongation of the intercom with reference to the chin zone of the shutter C₃=55-65 mm, elongation of the exhalation unit with reference to the chin zone of the shutter is C₄=65-75 mm, angle of inclination to the vertical line of the exhalation unit is A₁=25°-35°, angle of inclination to the vertical line of the inhalation unit is A₂=15°-25°, the panoramic glass is designed with variable curvature with the external radius of curvature of the central zone of glass R₁=45-55 mm and with the radius of curvature of the lateral zones R₂=110-130 mm, the sub-mask wings are designed with angle-shaped form with vertical H₈ => 15 mm and horizontal C₅=50-60 mm components, with elongation of horizontal shelves with reference to the sub-mask axis H₉=20-30 mm, with the maximum B₄=135-145 mm and the minimum B₅=80-90 mm span, with the width of underwing zone B₆=40-50 mm, on the external surface of the panoramic glass with a gap C₆=1.5-2.5 mm the protective film is made, the glass viewing zone depth is C₇=40-50 mm, the angle of inclination to the vertical line is A₃=90°-100° on the housing surface the lateral units for protective film are made, and the housing, the panoramic glass and the sub-mask are made from elastic polymeric material.

EFFECT: design improvement.

3 cl, 8 dwg