Patent ID: 7354252

Claim:
A pressure intensifier for fluids comprising: an intensifier piston comprising a high-pressure piston and a low-pressure piston having a greater diameter than the high-pressure piston; a high-pressure cylinder, wherein the high-pressure piston is moveably arranged in the high-pressure cylinder; a low-pressure cylinder, wherein the low-pressure piston is moveably arranged in the low-pressure cylinder and wherein the high-pressure piston and the low-pressure piston move together; a high-pressure connection, wherein the high-pressure cylinder is connected to the high pressure connection; a return connector; a control valve having a first switching position and a second switching position; a supply connector; a first control line connected to the supply connector; a second control line connected to the control valve; a first connection connecting the first and second control lines; wherein the low-pressure cylinder is connected via the control valve in the first switching position to the supply connector and in the second switching position to the return connector; wherein the first and second switching positions are controlled by a position of the intensifier piston, wherein the intensifier piston opens or closes the first connection between the first control line and the second control line; wherein the first connection is arranged completely within a movement stroke of the high-pressure piston, and wherein the high-pressure cylinder and the high-pressure piston delimit a high-pressure chamber, wherein the first and second control lines have openings in a wall of the high-pressure cylinder in an area that, independent of a position of the intensifier piston, is located outside of the high-pressure chamber; wherein a low pressure chamber bounded by the low pressure piston and the low pressure cylinder in the second switching position of the switching valve is connected by a connecting path with a chamber between the high pressure piston and the low pressure piston.