SELF-LOCKING NUT (VERSIONS) Russian patent published in 1996 - IPC

FIELD: threaded joints of structural members. SUBSTANCE: nut has body crown where locking bush is mounted. Axes of holes of bush and nut are matched. Split bush has hole which is eccentric relative to its outer surface. Bush rests against bead of crown; radial clearance is provided between inner diameter of crown and outer diameter of bush at point of slit. In one version, bush is reinforced with flexible ring fitted concentrically relative to its hole. In other version, crown of nut and outer surface of bush are tapering towards bead. Bush is provided with through slot and is mounted in crown at spaced relation to bead. Thickness of wall of split crown reduces towards bead. EFFECT: enhanced reliability. 4 cl, 4 dwg