DEVICE FOR ELIMINATION OF UNTIGHTNESS IN MAGNETOCONDUCTING PIPE LINES AND RESERVOIRS Russian patent published in 1996 - IPC

FIELD: elimination of untightness in steel pressure and no-pressure oil pipe lines and reservoirs. SUBSTANCE: device has sealing unit connected with two magnetic grips by means of cross-member. Each magnetic grip consists of two blocks mounted one above other for relative motion; cross-member is connected with blocks whose working surfaces are designed for contact with pipe surface to be sealed. EFFECT: enhanced efficiency. 3 cl, 6 dwg