UNIVERSAL DOOR CLOSER (VERSIONS) Russian patent published in 2009 - IPC E05F1/14 

FIELD: construction.

SUBSTANCE: invention is related to devices for opening and closing of doors that open to one side, and may be used is residential, production and public buildings on external and internal doors for their automatic closure. Universal door closer comprises working spring, air piston, stem, air control screw, adjustment bolt, control bush, adapter, the first external body, the first internal body, external semi-cartridge of the second body, internal semi-cartridge of the second body, front plugs, back plug, back plug with tail, amortising spring, hinge for fastening to door leaf, hinge for fastening to door jamb, calibrating hole or holes in internal body or hole in air control screw.

EFFECT: increased reliability of operation, prolonged service life, lower prime cost and universality.

13 cl, 14 dwg