application_number US 201213557565 A description particularly referring to the figures a device for applying a push or pull action referred to as u201c push pull u201d in technical terminology on tubes 100 to be laid in the ground for overcoming water courses or other types of obstacles two push blocks 2 and 2 u2032 disposed parallel to and mirroring each other and a vice 8 of known type which couples the whole device 1 to a tube 100 to be pushed pulled fig1 since said thrust blocks 2 2 u2032 are completely identical hereinafter for clarity only one of the two will be referred to a main cylinder 3 hinged on the bottom side to the above mentioned arm 6 carrying out a pushing pulling action on tube 100 a positioning cylinder 4 smaller in size than the foregoing located between main cylinder 3 and arm 6 and hinged thereto in two hinge points 24 and 23 respectively having the function to assist in coupling cylinder 3 to vice 8 previously positioned with a hinge pin 20 it further has the function of self balancing the horizontal axis of vice 8 a vertical adjustment cylinder 7 hinged to base 5 and arm 6 which actuates arm 6 itself aligning the work axis and thereby applying a force t to the excavation axis as shown in the figures base 5 is substantially bin shaped and has on one of the ends two through holes.