DEVICE FOR DRIVING LONG-MEASURING MEMBERS SUCH AS PIPES IN GROUND Russian patent published in 2001 - IPC

FIELD: mining engineering; underground pipeline driving. SUBSTANCE: device has body made in the form of bracket fastened to pipe being driven and percussion unit made in the form swing mass with link hinged to bracket and swing drive incorporating engine with crank. Length of percussion unit link is greater than distance between axis of its swing and swing mass. Part of link projecting over axis of its swing has stop installed for kinematic engagement with swingdrive crank whose axis is shifted from swing axis of percussion unit link towards driving pipe side. Crank length is shorter than total shift of link stop from its swing axis and than distance between axes of link swing and crank rotation. EFFECT: enhanced efficiency of member driving in ground; elimination of shock pulse transfer to hinged joint. 6 cl, 3 dwg