Importance

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Abstract

A hydraulic pressure intensifier includes a supply connection, a return connection, and a high-pressure connection. An intensifier piston assembly includes a high-pressure cylinder with a high-pressure piston displaceable therein and a low-pressure cylinder having a greater cross-section than the high-pressure cylinder, with a low-pressure piston which is displaceable therein. The low-pressure piston is connected to the high-pressure piston and divides the low-pressure cylinder into a first low-pressure chamber on the side of the high-pressure piston and a second low-pressure chamber. A switching valve acts on the second low-pressure chamber with pressure from a pressure source or relieves it of pressure. The switching valve includes a valve element which in one direction of movement is subjected to a pressure in a first control pressure chamber with a smaller pressure application area and in the opposite direction of movement is subjected to a pressure in a second control pressure chamber with a larger pressure application area. The pressure in the second control pressure chamber is controlled by the low-pressure piston.

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First Claim