APPARATUS FOR CONNECTING METALLIC TUBES Russian patent published in 1994 - IPC

FIELD: pipeline systems. SUBSTANCE: apparatus has clamping members in the form of thin-wall sleeve, having cutouts, forming petals at side of the tube input, the sleeve being placed between an outer surface of a sealing gasket and an inner surface of a union nut. A surface of the petals of the clamping member has conicity from its edge, respective to a conicity from an edge inside of the union nut. An inner surface of the petals has notches at side of tube output. The gasket, made of elastic material in the form of a sleeve with single-side cone part at side of a body, is placed between an inner surface of the clamping member and an outer surface of an end portion of the tube, being joined. Inside the body has a removable rest protrusion, arranged in an annular turning of the body. The union nut has inside its threadless part a turning, forming in a sectional view a smooth line, being transformed to a cone turning from the edge of the nut. EFFECT: enhanced reliability of tube joint. 5 cl, 8 dwg