PROTECTIVE WINDOW GRATE Russian patent published in 2015 - IPC E06B9/02 

FIELD: construction.

SUBSTANCE: invention relates to construction equipment, in particular, to safety device design, and may be used for protection of window openings from unauthorised penetration into a room and for public evacuation from buildings in case of fire. A protective grate is made in the form of at least two hingedly connected and serially opening links with sections of steps and lock joints, at the same time between each link of the grate there is an additional facility made in the form of a U-shaped crosspiece inclined at the angle of 5.0-10.0° providing for movement of each hingedly connected subsequent section of each link towards inclination of the U-shaped crosspiece. Inclination of the U-shaped crosspiece of the additional facility is made towards the section with the steps of the first link. Currently the author produced an experimental sample of the proposed grate, and it has been tested by installation in a window on the fifth floor of a building. After pin rotation and release of the upper axis of the grate the links of the latter together with sections and steps opened one by one and reached earth surface. Evacuation of the building was successful.

EFFECT: improved design.

2 cl, 2 dwg