SYSTEM JOINING PROFILE MEMBERS OF DOORS AND WINDOWS, METHOD OF JOINING OF PAIR OF PROFILES OF FRAMES OF DOORS AND WINDOWS Russian patent published in 1997 - IPC

FIELD: construction industry. SUBSTANCE: keys A are positioned along profile C and have opposite flanges. On one side there is flange in the form of wrench 1, on the other side - disc shaped flange 2 connected by means of annular groove 3 with intermediate washer in the form of key 4. Mentioned disc-shaped flange 2 presents modified form with elastic interacting protrusions positioned along mutually perpendicular axes. One of protrusions matches plane passing along longitudinal axis of mentioned flange in the form of wrench 1. After insertion of disc- shaped key 4 into same profile C and its turn through 45 deg relative to interacting axes of first profile mentioned above keys A can freely along spiral inside corresponding groove of first profile C. EFFECT: improved joining reliability and efficiency. 6 cl, 7 dwg