AUTOMATIC DOOR CLOSING DEVICE Russian patent published in 2020 - IPC E05D3/18 E05F3/10 E05F3/20 E05F1/12 

FIELD: doors.

SUBSTANCE: improved device (2, 2') for automatic door closing, used for installation in concealed hinge (4), comprising two housings (8, 10), hingedly connected to each other by means of at least one pair of levers (48, 60) and attached to web (5) and fixed structure (6), respectively, wherein said device (2, 2') is intended for attachment to one (8) of two housings of hinge (4) and insert together with said housing into corresponding recess (7) made in web (5), wherein device (2, 2') is characterized by that it contains: moving element (34), which is engaged with hinged lever (48) of said loop (4), resilient mechanism (42), located between first element (44) connected to movable element (34), and second element (47) connected to housing (8) of loop (4), in which said device (2, 2'), wherein elastic mechanism (42) is configured to be loaded when turning during opening of web (5), connected to loop (4), and return of mechanical energy stored at opening stage, to moving element (34) to cause automatic closing of web (5) connected to loop (4), mechanism (50, 51, 52, 53, 55, 57) for changing preliminary loading of resilient mechanism (42) and, consequently, automatic closing speed of web (5), wherein said mechanism (50, 51, 52, 53, 55, 57) is configured to change the distance between first (44) and second (47) elements between which resilient mechanism (42) is inserted; and that said mechanism (50, 51, 52, 53, 55, 57) for changing pre-load of resilient mechanism (42) can be controlled by base (75) of hinge body (8), which is visible even after closing device (2, 2') has been inserted into recess (7) made in web (5).

EFFECT: device for automatic door closing is proposed.

32 cl, 15 dwg