KNEE PRESS WITH HYDRAULIC DRIVE Russian patent published in 2011 - IPC B21J9/02 B30B1/08 

FIELD: machine building.

SUBSTANCE: knee press with hydraulic drive consists of a bed with a first and second cross bars and poles. A working slider dividing space between the cross bars is installed in guides of the poles. A punch is positioned in first space between the first cross bar and the slider. At least one knuckle-joint leverage with the first and second levers is positioned in second space between the second cross bar and the slider. The hydraulic drive has at least one hydraulic cylinder. The press is equipped with at least one additional slider travelling in additional guides perpendicular to the guides of the working slider. In the additional slider there is an orifice perpendicular to the additional guides; in the orifice there is installed a link with a hinge connecting it with an end of the first lever of the knuckle-joint leverage.

EFFECT: accumulation of kinetic energy sufficient for work piece deformation for a short time of punch contact with it.

13 cl, 8 dwg, 3 tbl