METAL DOOR Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: door has door frame and door body hung to door frame through hinge joints. Poles and web of door frame are made from angles, whose strips extending in parallel with door plane are faced outside door frame. Door frame threshold is made in the form of rectangular tubular member. Pole has auxiliary angle, whose strip extending in parallel with door plane is faced inward of door frame. Hinge joints pins are fixed on auxiliary angle strip inner surfaces. Sleeves of hinge joints are secured on door body through U-shaped clips. Plates with openings for receiving fastening members are attached to pole angle strips extending perpendicular to door plane. EFFECT: simplified manufacturing and mounting of door, increased reliability in operation and protective properties combined with minimum weight. 4 dwg