72300968
Jun 20, 1968
Mar 23, 1971
HYDRAULIC POWER SUPPLY UNITS WHICH CIRCULATE AND REGULATE THE FLOW OF FLUIDS IN A HYDRAULIC SYSTEM; AND HYDRAULIC CONTROL SYSTEMS COMPRISED OF HYDRAULIC SERVO VALVES, SERVO ACTUATORS, AND OTHER CIRCUIT COMPONENTS WITH THE COMBINATION THEREOF PRODUCING A RESULTING FORCE, A FORCE THAT MAY INTERACT WITH AN INPUT OR REFERENCE FUNCTION
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