CONNECTION OF COAXIAL PIPES (VERSIONS) Russian patent published in 2003 - IPC

FIELD: mechanical engineering; repair jobs; construction of buildings. SUBSTANCE: metal-filled polymer pipes have load-bearing metal layer and double-sided polymer coat having riffles at joint area which are engageable with similar riffles on wall of holder. Wedge mechanism is placed on rheological material (rubber, plastic or their compositions) deformed by wedge of saw-shaped profile. Wedge mechanisms are located between rheological material and bearing ring with bead. For mounting and locking the wedge mechanisms, use is made of press- mechanism. According to second version, bush is fitted on inner side of pipes. According to third version, working agent (water or oil) is fed to cavity of rheological material. EFFECT: enhanced reliability and strength of joint. 4 cl, 3 dwg