Hydraulic control system for at least two consumers

Details Hydraulic control system for at least two consumers Hydraulic control system for at least two consumers

1977-06-24

1978-10-17

Geoghegan, Edgar W.

Motors: expansible chamber type

Plural relatively movable or rigidly interconnected working...

Condition responsive means for modifying working member...

91518, 91521, 91459, 60484, 60DIG2, F15B 1116

Patent

active

041202333

ABSTRACT:
Each consumer is provided with a load-compensated direction-reversing valve. Each valve performs a throttling function and a pressure-compensation function in order to establish a selected volumetric flow rate, and also a direction-control function. Each valve comprises a first control valve stage and a second control valve stage. One stage performs the throttling function, the other the pressure-compensation function. One of the two control valve stages also performs the direction-control function. The pressure drop across the stage which performs the throttling function at least in part controls the setting of the stage which performs the pressure-compensation function. Each valve is provided with an electromechanical transducer generating electrical signals indicative of the settings of the stage which performs the pressure-compensation function. These signals are evaluated by an electrical information-processing unit, and the results of the evaluations are used to automatically adjust the setting of a line pressure regulating valve.

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