LOCK OF YIELDING JOINTS OF METAL FRAME SUPPORT Russian patent published in 1994 - IPC

FIELD: mining. SUBSTANCE: lock has clamp with nuts and strip which is made shaped with constant cross-section over special section horizontal axis. Bent off flanges are thinning towards ends due to deepening of longitudinal radial hollow and provided with stiffening ribs thickening from ends. Stiffening ribs are made with increasing height over square parabola and inertconnected by bearing plane contacting side wall of special section. In this case, bearing plane adjoins side wall to thrust with its edge the flange of special section. EFFECT: higher efficiency. 4 dwg