LINING PANEL AND BUTT-JOINING LOCK FOR LINING PANELS Russian patent published in 2001 - IPC

FIELD: industrial and civil engineering. SUBSTANCE: lining panel used for lining surfaces of industrial, administration, residential, and everyday structures has central part, folded side edges, and double-member butt- joining lock whose members are placed on side edges of panel. Additional support in the form of double-walled ridge is made in central part of panel; mentioned ridge rests on central part of panel bent symmetrically to side edges; bending angle of side edges is 41 deg. 53 min. One of lock members is made for resting on surface being lined. Butt-joining lock for lining panels has two members; one of mentioned members enters other one in the course of mating; female member is made in the form of rabbet. Male member is made in the form of sine wave in cross section with amplitude increasing towards rabbet bottom as measured at angle to longitudinal axis of female member. EFFECT: improved tightness and operating characteristics of joint. 5 cl, 3 dwg