ROLL INNER WINDOW GRATE Russian patent published in 2012 - IPC E06B9/18 

FIELD: construction.

SUBSTANCE: roll inner window grate relates to facilities of technical equipment of living quarters and closed premises with account of provision of higher safety of people in case of fires. The grate comprises a roller blind arranged inside an opening 1 of a window 2 in the form of connected metal plates 3, elastically rolled by a torsion spring 4 in a roll 5, placed into a box 6. The grate is equipped with side valves 7, 8, with handles 9, 10, installed on the lower profile 11 of the roller blind. Valves with the help of a helical cylindrical spring of compression-extension 12 are elastically introduced into holes 13 of angle fixators 14, 15, arranged at edges of a windowsill 16. Onto the surface of the windowsill there is a bent elastic strip 17 laid as bent with its concavity upwards, freely installed in guide brackets 18, screwed to the windowsill with screws 19. Fixators are fixed on top on the strip, and the spring 12 is made of an alloy with an effect of thermomechanical shape memory.

EFFECT: higher safety of people in case of fire due to facilitation of possibility of their emergency evacuation.

2 dwg