HINGE Russian patent published in 1997 - IPC

FIELD: hinges applicable for wings of entrance doors in buildings and separate flats. SUBSTANCE: hinge has two parts whose tubular members are hinged to each other by means of axle, two half-axles, ball and pins. Axle has annular bead and length of axle ends from annular bead differs in the value of gap between upper end of lower tubular member and bead on axle. Made on ends of axle and half-axle are depressions, for instance, of cylindrical shape which are made so that axle rests on ball over circular surface of depression end and gap is formed between bottom of depression of axle and ball. Ball has point support on half-axle and circular gap between ball and side walls of depression. Holes for pins in half-axles are equidistant from ends. EFFECT: higher efficiency. 3 dwg