HYDRAULIC DRIVE MECHANISM WITH AUTOMATIC LEAKAGE COMPENSATION

Piston 3, subject to the working pressure developed by variable-displacement pump 1, which delivers fluid to power cylinder 2, overcomes the resistance of spring 4 and actuates the mechanism for increasing the pump output. By selecting spring 4 with the proper load characteristics, it is possible to compensate automatically for leakage occurring in the hydraulic system at increased pressures by in…