HYDRAULIC PRESS Russian patent published in 2015 - IPC B30B1/00 B30B15/16 

FIELD: machine building.

SUBSTANCE: hydraulic press comprises a stand, a power hydraulic cylinder with a piston and a stem, with piston and stem cavities, which are by channels connected to hydraulic lines of a control circuit. The hydraulic cylinder comprises a pressing plunger with the possibility of its extension via a hole in one end of the hydraulic cylinder, the second end of which is fixed in the stand, and in this end the piston stem is fixed. The channel of the stem cavity is made inside the stem, and the channel of the piston cavity - inside the stem and the piston. In the best version the hydraulic press is made in the form of a vertical press of double-sided action, with arrangement of upper and lower hydraulic cylinders.

EFFECT: increased efficiency of a hydraulic press, reduced necessary amount of working liquid in the form of oil, improvement of its weight and dimension parameters.