HYDRAULIC MULTIPLIER Russian patent published in 2017 - IPC F15B3/00 

FIELD: machine engineering.

SUBSTANCE: multiplier comprises coaxially arranged low-pressure and high-pressure hydraulic cylinders with pistons and channels for low-pressure hydraulic fluid supply, drainage and discharge of high-pressure hydraulic liquid. The pistons and bodies of said hydraulic cylinders are interconnected to form closed power structure. A return valve is installed in the high-pressure hydraulic liquid discharge channel. The piston of high-pressure hydraulic cylinder is made in form of hollow cylinder opened from the side facing the high-pressure hydraulic liquid discharge channel with said return valve. In the opposite part of said hollow cylinder, there is additionally arranged a return valve. Cavity in the high-pressure hydraulic cylinder is connected to the hydraulic fluid inlet cavity of the low-pressure hydraulic cylinder through said return valve, which is located in the piston of the high-pressure hydraulic cylinder. In the piston of low pressure hydraulic cylinder, there are hydraulic distributing and switching devices with a plunger and a rod moving the piston plunger with a pilot valve assembly installed therein in extreme positions, and installed to ensure reciprocating movement of hydraulic cylinders pistons. Inlet and drain openings of hydraulic liquid outlet are made in low-pressure hydraulic cylinder.

EFFECT: reduced dimensions and weight of the multiplier.

6 dwg