FIELD: machine building.
SUBSTANCE: invention relates to aspirating masks. Proposed valve comprises flap and seat. Said flap can be secured in cantilever to bend from valve seat seal surface toward open position. Valve can comprise the body to cover partially both valve seat and said flap. In compliance with some versions, body height makes not over 1.25 cm while spacing between flap and seal surface at flap open position makes at least 0.35 cm. Ledge can be engaged with body inner surface, ledge height increasing toward body front. In some versions, said ledge can have the shape following that of the flap at open position.
EFFECT: lower outward breath pressure, ease of breathing.
15 cl, 11 dwg
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