RESPIRATOR WITH HALF-MASK WITH SLOT-TYPE EXPIRATORY VALVE Russian patent published in 2013 - IPC A62B23/00 

FIELD: fire-prevention facilities.

SUBSTANCE: invention relates to personal respiratory protective equipment. The respirator consists of two cartridges, a headband and a half mask, valves of inhalation and an exhalation valve, attach fitting of the headband and cartridges attach fittings located on the sides. The half mask obturator is made of elastic material. In the inner part of the plastic housing of the half mask the elastic obturator is fixed. The convex shape of the plastic frame of the headband provides tight fit and fixation on the head. In the headband frame the upper and lower elastic knitted belts are mounted. The cartridges attach fittings are equipped with two adapters and are made in the form of saddles, they provide bayonet connection of the cartridges to the housing of the half mask. The slot-type shape of the expiratory valve has in width two attachment points to the plastic housing of the half mask. The exhalation valve is closed with the streamlined lid with holes for the air passage. The obturation band is identical to the shape of the human face. The respirator headband is connected to the plastic housing of the half mask with the upper and lower elastic belts in four points through the buckles. The latch and the wedge of the buckle of the lower belts provide fixation and adjustment of the belts. For interconnection the lower ends of the belts are equipped with snaps for providing carrying the respirator on the neck.

EFFECT: increased performance characteristics are achieved at simultaneous improvement of protective properties, ergonomics and aesthetics of the product.

2 cl, 8 dwg