DOOR LEAF Russian patent published in 1999 - IPC

FIELD: construction engineering. SUBSTANCE: relates to design of door leaf installed at entrance to premises of dwelling and public buildings. Door leaf has panels, intermediate layer, middle inserts, and binding which is made up of upper stile, lower rail, and side bars. Made in internal side surface of binding bars and in side surfaces of middle inserts is single longitudinal slot per each for installing edges of leaf panels. Door leaf is provided with cores, system of dowels, intermediate layer, and longitudinal slots in each internal side surface of binding members and in side surface of middle inserts. Edges of leaf panels and inserts are seated respectively in extreme and intermediate longitudinal slots. Installed between layers of leaf panels are cores, and installed between cores, leaf panels, and inserts are intermediate layers made of resilient material. Binding bars and middle inserts have longitudinal holes with dowels inserted into them. Inserts and dowels exceed in strength that of leaf panels, binding members and middle members. Aforesaid embodiment of door leaf allows for increasing strength of door leaf. EFFECT: higher capacity. 2 dwg