PROTECTIVE DOOR WITH CONCEALED OFFSET LOCKS, ELONGATED CROSS-BARS, CONCEALED HANDLE, INVISIBLE HINGES AND PROTECTIVE FLAP Russian patent published in 2008 - IPC E06B3/00 

FIELD: construction, particularly window sashes, door leaves, or like elements for closing openings, namely door assemblies.

SUBSTANCE: protective door comprises door leaf, pivotally arranged in door-frame so that it may rotate about vertical axis. Protective door also has locking assembly including crossbar lock. Door leaf comprises fixed metal sheets. Door wing includes frame, protective sheets, outer and inner flaps. The frame comprises horizontal and vertical end and central posts fixedly connected with each other. Vertical posts are located at horizontal post ends at both sides thereof and in center. Locks are connected to vertical central posts of the frame. Horizontal posts have orifices for protective sheet and hinge receiving, as well as orifices to cooperate with locking device member including a number of crossbars. Lock crossbars additionally have extension means, which are connected to each other to create frame structures provided with reinforced crossbars at ends thereof. Crossbars of other locks are directly connected with frame structure. Crossbar extensions of the first locks pass through orifices of frame structure of other locks. Locks additionally have lock catch extension provided with reinforced crossbar at end thereof. Locks also include vertical locking device providing locking in vertical direction. Said vertical locking device comprises guiding means terminating in member including a number of crossbars. Protective sheets are bent of steel sheets having predetermined thicknesses and are provided with keyholes, as well as with orifices for handle and video security device.

EFFECT: increased resistance to breaking-in.

13 dwg