HYDRAULIC NAIL PULLER Russian patent published in 1995 - IPC

FIELD: building engineering. SUBSTANCE: effect is achieved by the fact that the hydraulic nail puller is equipped with additional hydraulic cylinder 6 rigidly connected with main hydraulic cylinder 7 and having radial hole 15 in the wall from the side of the piston cavity. Hole 15 is in communication with the radial hole of main hydraulic cylinder 7. Piston 8 and rod 9 are placed in the cavity of hydraulic cylinder 6. One arm of double-arm lever 10 is hinged with the face end of hydraulic cylinder 7, the second arm is made as handle 11. The axis of swinging of level 10 is hinged with rod 9. When some force is applied to handle 11, piston 8 of hydraulic cylinder 6 forces out the working liquid through hole 15 into the cavity of hydraulic cylinder 7. When rod 14 interacts with gripper 3 preliminarily brought under the head of nail 4, the last is extracted. EFFECT: enhanced smoothness of the nail extraction. 1 dwg