Hydraulic machine unit and method for operating such a machine unit
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United States of America Patent
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Jun 14, 2022
Grant Date -
Jul 5, 2018
app pub date -
Jun 30, 2016
filing date -
Jul 3, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A hydraulic machine unit that can be operated with various working forces, in which working medium is selectively delivered, via a pump-piston accumulator system, to a main cylinder and at least one driving cylinder, wherein at least for one working stroke a pump system of the pump-piston accumulator system is used to provide working medium to a piston accumulator of the pump-piston accumulator system, and then at least for the working stroke at least the main cylinder is charged with a working pressure from the piston accumulator, and wherein at least for a return stroke the at least one driving cylinder is charged with a return stroke pressure from the pump-piston accumulator system, can be of structurally simple configuration if, at reduced working forces, the working pressure is reduced with respect to the piston accumulator pressure prevailing in the piston accumulator.
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