LOCKING THREADED JOINT Russian patent published in 2000 - IPC

FIELD: locking threaded joints; fastenings operating on principle of wedging or pinching the thread in order to avoid loosening of threaded joint. SUBSTANCE: locking threaded joint includes rod-type threaded tail-piece and nut assembly including first and second nut parts having respective bevels and shoulders for relative engagement. Besides that, it contains third nut part with through hole for passage of threaded tailpiece; first part is located between second and third ones. Third nut part has flat outer and inner surfaces. According to another version, third nut part has flat inner surface for engagement with surface of article to be thrown into engagement and outer surface has bevels and shoulders for engagement with bevels and shoulders of first nut part; first and second nut parts are engageable by means of bevels and shoulders. EFFECT: modified threaded joint of improved type. 7 cl, 9 dwg