Fluid motor actuators

Claim 1

IN A SYNCHRONIZED PLURAL ACTUATOR SYSTEM, A PLURALITY OF SIMILAR EXTENSIBLE ACTUATORS ADAPTED TO BE CONNECTED AT ONE END TO A PART OR PARTS TO BE ACTUATED, EACH ACTUATOR COMPRISING A CYLINDER, A PISTON RECIPROCATIVE IN SAID CYLINDER, AN ACTUATOR PISTON ROD FIXED TO SAID PISTON AND EXTENDING OUT THROUGH SAID END OF SAID CYLINDER IN SEALED RELATION ADAPTED TO BE CONNECTED TO SAID PART TO BE ACTUATED, COMMON HIGH PRESSURE HYDRAULIC FLUID SUPPLY CONDUIT MEANS CONNECTED INTO EACH OF SAID CYLINDERS AT THE ACTUATOR ROD ENDS THEREOF, A CONSTANT FLOW HIGH PRESSURE HYDRAULIC FLUID PUMP CONNECTED TO SAID SUPPLY CONDUIT MEANS FOR SUPPLYING A UNIFORM HIGH PRESSURE HYDRAULIC CONSTANT FLUID FLOW INTO SAID SUPPLY CONDUIT MEANS, IDENTICAL FIXED AREA FLOW RESTRICTION MEANS IN SAID CONDUIT MEANS FOR EACH CYLINDER, A FLOW OUTLET IN THE OPPOSITE END OF EACH CYLINDER, A FLUID RETURN CONDUIT CONNECTING SAID FLOW OUTLETS OF ALL OF SAID CYLINDERS WITH THE INLET SIDE OF SAID PUMP, A FLOW RESTRICTION IN SAID FLUID RETURN CONDUIT HAVING A FIXED FLOW RESTRICTIVE AREA FOR MAINTAINING SIMILAR FLUID PRESSURES IN EACH OF SAID CYLINDERS BETWEEN THE OPPOSITE ENDS THEREOF, VARIABLE AREA FLOW RESTRICTION MEANS BETWEEN THE OPPOSITE ENDS OF EACH OF SAID CYLINDERS LOCATED BETWEEN THE AFORESAID FIXED FLOW RESTRICTIONS, FOR VARYING THE RELATIVE PRESSURE OF THE PRESSURE FLUID IN EACH CYLINDER AT THE OPPOSITE SIDES OF THE PISTON THEREIN, MECHANICAL ADJUSTING MEANS CONNECTED FOR SIMULTANEOUSLY VARYING THE FLOW AREAS OF SAID VARIABLE AREA FLOW RESTRICTION MEANS IN ALL OF SAID CYLINDERS TO SIMULTANEOUSLY VARY THE DIFFERENTIAL PRESSURES AT OPPOSITE SIDES OF THE PISTONS IN ALL OF SAID CYLINDERS, AND MEANS OPERABLE BY THE PISTON IN EACH CYLINDER FOR VARYING THE AREA OF SAID VARIABLE AREA FLOW RESTRICTION MEANS IN PREDETERMINED RATIO TO THE RELATIVE MOVEMENT OF THE PISTONS IN SAID CYLINDERS RESPONSIVE TO THE DIFFERENTIAL PRESSURES ON THE OPPOSITE SIDES OF SAID PISTONS.