FIRE PREVENTING BARRIER Russian patent published in 2014 - IPC A62C2/00 

FIELD: fire safety.

SUBSTANCE: fire preventing barrier comprises a direct-flow housing and a composite locking element mounted inside the housing, comprising a locking element itself and a fire damper mounted on the locking element and made wholly or partly of titanium nickelide with reversible effect of shape memory. The damper has a shape not overlapping the opening of the direct-flow housing at a temperature below the temperature of beginning of the reverse martensite transformation, and a shape overlapping the opening of the housing at a temperature above the temperature of end of the reverse martensite transformation. At that the fire damper is made with the ability of the reversible effect of shape memory by treating the damper prior to securing on the locking element, with the cyclic thermal heating and cooling in combination with the deformation.

EFFECT: invention enables to reuse the fire preventing barrier without repeating mounting and replacement of structural elements.

10 cl, 4 dwg