PERMANENT JOINT OF HIGH-PRESSURE HOSE WITH CONNECTING FITTINGS Russian patent published in 1998 - IPC

FIELD: mechanical engineering; connection of high-pressure hoses having metal skeleton with connecting fittings. SUBSTANCE: inner surface of coupling in zone of pinching is provided with circular projections whose cross section has form of right-angled trapezium; length of larger base of trapezium exceeds that of smaller base by three times; outer surface of nipple is provided with mating circular bores whose width exceeds length of lesser base of projection on inner surface of coupling by 4.5 times and width of larger base by 1.5 times; depth of bore of nipple is half the height of projection on inner surface of coupling; outer surface of coupling has circular projections equal to length of larger base of projection on inner surface of coupling. EFFECT: enhanced reliability. 3 dwg