PERCUSSION MECHANISM FOR WELL MAKING AND DEVICE FOR TRENTLESS REPLACEMENT OF PIPELINES USING PERCUSSION MECHANISM Russian patent published in 2004 - IPC

FIELD: building industry, particularly deteriorated pipeline replacement. SUBSTANCE: percussion mechanism has composite separable body. Inner body part has adapter interfacing with anvil. Striker comprising fixedly connected rod and barrel is arranged into body. Barrel has through windows. Inclined side ends of barrel windows are parallel to striker axis. Front outer body part has ribs and depressions inclined to striker longitudinal axis. Device for trentless replacement of underground pipelines has percussion mechanism, tube-disintegration unit loosely located on stretching wire extender relative percussion mechanism, expander contacting percussion mechanism and connecting with new joined tube. Outer expander surface has slots or ribs inclined to longitudinal axis. Contact between expander and percussion mechanism is performed by interaction of at least one fixed expander joint-pin with any mating flat formed on striking mechanism perimeter. Stretching wire extender is made as longitudinal hinge. EFFECT: elongated service life, extended mechanism capabilities. 12 cl, 9 dwg