HYDRAULIC TOOL FOR CREATION OF TORQUE INTENDED FOR TIGHTENING AND RELEASING OF THREADED CONNECTION (VARIANTS) Russian patent published in 1999 - IPC

FIELD: mechanical engineering. SUBSTANCE: Tools has torque transmission shaft. Shaft is provided with two end parts, one of which serves for interaction with threaded connection. Torque is transmitted to shaft by means of hydraulic drive and driving member. The latter is mounted for successive axial movement in two opposite directions. These movements cause unidirectional rotation of shaft. Other variant of tool includes use of bush with teeth immovable relative to body and ratchet gear. Ratchet gear is mounted on shaft for turning with respect to the latter and contacting the bush teeth. Driving member may continue axial movement relative to shaft and ratchet gear after the latter comes in contact with immovable bush. One more variant of tool provides for manufacture of driving member of two parts. each part is positioned on shaft for transmission of unidirectional torque to the latter. EFFECT: creation of high torque. 9 cl, 3 dwg