FIELD: doors and windows, particularly means for double-casement door or window protection against unauthorized opening.
SUBSTANCE: breaking-in prevention device comprises pusher fitting created on peripheral surface of cut of adjacent spans in stepped profiled groove. The fitting includes covering pusher guide. Pushed slides along bottom side. Device also has locking member moved by pusher fitting pusher brought into engagement and released therefrom by means of locking engagement members. Engagement members are installed on covering guide of another pusher fitting and are provided with blocking means. Blocking means restrains movement of closed fixed wing pusher due to cooperation of safety part arranged in the pusher with locking member located on pusher of another pusher fitting. In closed position safety part is fully closed with locking engagement assembly.
EFFECT: decreased costs of breaking-in prevention device building in wing pusher fittings.
12 cl, 7 dwg
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