DETACHABLE SCREW JOINT Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: bushing is interposed between the butt units. Outer surface of one of the butt units has ring groove. The other unit has threaded part. The bushing is made up as a heat insulating insert armored by the metallic race with slots made in its inner surface and arranged coaxially on the outer side of a locking nut. The locking nut has cylindrical shank provided with uniformly arranged ports. Slide blocks, which interact with slots of the race from one side and are received in groove from the other side, are radially received in the openings. Axially alined longitudinal grooves which are uniformly arranged over periphery are made in the threaded parts of the nut and the second answered unit. The slide blocks are L-shaped. EFFECT: enhanced reliability. 3 cl, 7 dwg