| 摘要 |
When leakage occurs between pressure chambers (22, 24; 30, 32) of the cylinders (8, 10), a reference instrument (46) is able to make adjustment. This corrects relative operating pressures of the cylinders and/or of the pressure in the pressure chambers (22, 24; 30, 32) of the cylinders. The cylinders are differential with supply and return lines (34, 36) interconnecting their cylinder chambers (22, 32) and piston rod annular chambers (24, 30). Further interconnecting circuitry includes non return valves and pressure accumulators. An Independent claim is included for the corresponding method of control.
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