SLIDING INNER GRATE FOR ENCLOSING WINDOW AND DOOR OPENINGS Russian patent published in 2011 - IPC E06B9/02 

FIELD: construction.

SUBSTANCE: sliding inner grate for enclosing of openings comprises a bed arranged inside the frame with upper and lower guides, made of a movable stand with a roller and a fixed stand connected by a collapsible bellows mechanism, a fixing mechanism and a crossbar lock. Stands are connected with two cylindrical springs. The fixing mechanism is made in the form of a plank arranged in the groove in front of the grate and installed elastically on U-shaped thermal bimetal springs with an external active layer, and equipped with a vertical pin fixed as a cantilever on its external surface, which is entered via a hole into contact with a movable stand and locking the grate in its pulled-in condition.

EFFECT: invention will make it possible to increase safety of people in case of fire due to its emergency evacuation via window and door openings.

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