MECHANICAL PULLER Russian patent published in 1994 - IPC

FIELD: mechanical engineering. SUBSTANCE: in the course of rotation of power-transmission screw 7 bushing 5 leans against shoulder 14 and through pin 19 against groove 12 and interacts with thread 8 thus providing for force necessary for pulling off part 17. At the same time bushing 6 also thrusts through pin 11 against groove 12 and slips down along thread 9. In the course of reverse rotation of power-transmission screw 7 pin 11 enters cross part of groove 13 and now bushing 8 ensures necessary pulling force and bushing 5 slips down along thread 8. Part 17 is pulled off from shaft 16 and bushings 5 and 6 come to each other on power-transmission screw 7. EFFECT: improved efficiency and convenient operation. 2 dwg