HYDRAULIC CLAMP Russian patent published in 1997 - IPC

FIELD: mining industry. SUBSTANCE: in assembling and removing of support from drift and also for dismantling interference-fit joints such as shaft-bush highly efficient is the use of hydraulic clamp in which piton with rod divides a cylinder, which functions as clamp body, into high- and low-pressure spaces. Attached to piston in high-pressure space is additional hollow rod. Plunger-type pump is mounted on additional rod, and plunder is installed in hollow of this rod. Piston and rod have passages with delivery and suction valves. Low-pressure space is provided with return spring and filled with working medium. Spaces are connected by passage with shut-off valve. EFFECT: higher efficiency. 3 cl, 1 dwg