| 摘要 |
<p>The arrangement consists of a piston which can move in a cylinder and which can be loaded by a pressure medium, both in the work travel and during retraction of the piston. The arrangement incorporates a control system for the pressure of the medium. The piston is provided with an auxiliary pisotn, the pressure on which can be controlled and relieved on one side. The auxiliary piston sits tight against a valve seat. When the auxiliary piston moves, the pressure medium flows within a fraction of a multi second to the piston rod side of the main piston. The movement of the auxiliary piston is so large than an equally distant release of pressure on the main cylinder follows.</p> |
