WING DOOR Russian patent published in 2010 - IPC E06B3/00 

FIELD: construction.

SUBSTANCE: wing door installed in frame welded of rolled metal, comprises attached surfaces - external one and internal one, which is located within premises, both made of metal sheet, device that provides for door rotation relative to vertical axis, arranged in the part of door opening, which remains closed while door is opened. Sheet is bent according to shape of shell, which is welded to pipe. Inside pipe there is upper radial tenon arranged as inserted into hole provided in frame, and lower radial-thrust tenon, which is fixed to frame. Upper and lower bushes fixed to pipe by means of pins are installed in bores arranged at pipe ends. On radial surface of lower pin there is plane provided that contacts thrust ball, which is pressed by door weight force to end surface of lower tenon. Internal bush is inserted into lower bush to cover ball and external surface of radial-thrust tenon with its internal surface, being fit with clearance.

EFFECT: reliability and stability of door.

5 cl, 2 dwg