Device for application of pressing force has pressure relief facility which when predetermined pressure acting upon piston has been reached opens up return path for pressure medium to reservoir

摘要

The device for the application of a pressing force includes a working piston (35) operated by a pressurized medium stored in a reservoir (29), and operating elements on the piston for the pressing elements. The device has a pressure relief facility (48) which when a predetermined pressure acting upon the piston has been reached opens up a return path for the pressure medium to the reservoir. The pressure relief facility has an overpressure valve which is flow-connected to the pressure chamber in front of the working piston.