HYDRAULIC PULLER Russian patent published in 1994 - IPC

FIELD: mechanical engineering. SUBSTANCE: claws 7 turn rods 6 upwards sliding towards center along ends 9 and 10 of crosspiece 5 which compresses spring 4. Additional rods 11 are turned by claws 7 towards center, and bushings 12 move somewhat away from ends 9 and 10 of crosspiece 5 sliding along claws 7. Crosspiece 5, acted upon by spring 4 lowers, thus making claws 7 move apart until they are get embraced by part 15. Claws 7 turn rods 6 downwards and move additional rods 11 apart. As soon as claws 7 get embraced by part 15, bushings 12 will slip along claws 7 away from ends 9 and 10 of crosspiece 5 until they thrust against body 14, thus pressing claws 7 to part 15. EFFECT: enhanced convenience of operation. 1 dwg