Automatic readjusting and feeding device for a hydraulically operated scraping device in a peeling centrifuge

Claim 1

AN AUTOMATIC READJUSTING AND SETTING DEVICE FOR A HYDRAULICALLY OPERATED SCRAPING APPARATUS, COMPRISING A HOUSING, A CENTRIFUGE DRUM ROTATABLY MOUNTED IN SAID HOUSING; A HYDRAULICALLY OPERATED SCRAPER DEVICE, INCLUDING A SHAFT HAVING AT LEAST ONE PEELING KNIFE EXTENDING RADIALLY THEREFROM, SAID SHAFT BEING MOUNTED FOR ROTATION AND RECIPROCATION IN SAID CENTRIFUGE DRUM, SAID SHAFT INCLUDING A PISTON, A FIRST SETTING CYLINDER CONTROLLING THE ROTARY MOVEMENT OF SAID SHAFT AND HAVING AN OPERATING CHAMBER, A FIRST PRE-CONTROL SLIDE CONTROLLING THE RECIPROCATION OF SAID SHAFT, A HYDRAULIC ACTUATOR INCLUDING SAID PISTON, PRESSURE AND OUTLET CONNECTIONS BETWEEN SAID FIRST PRECONTROL SLIDE AND SAID HYDRAULIC ACTUATOR, SAID FRIST PRECONTROL SLIDE BEING PERIODICALLY SHIFTED TO CONTROL SAID PRESSURE AND OUTLET CONNECTIONS TO SAID HYDRAULIC ACTUATOR, IN ORDER TO RECIPROCATE SAID SHAFT, A SECOND CYLINDER HAVING A CHAMBER AT EACH END THEREOF, A DOUBLE-ACTING DOSING PISTON RECIPROCATING IN SAID SECOND CYLINDER, A PRESSURE SUPPLY LINE, MEANS FOR CONNECTING SAID END CHAMBERS OF SAID SECOND CYLINDER ALTERNATELY TO SAID PRESSURE SUPPLY LINE AND TO SAID OPERATING CHAMBER OF SAID SETTING CYLINDER, A SECOND PRE-CONTROL SLIDE INCLUDING RETURN SPRINGS, MEANS FOR ACTUATING MECHANICALLY SAID SECOND PRECONTROL SLIDE UPON REACHING THE END POSITIONS OF PISTON TO REVERSE MOVEMENT OF THE FIRST MENTIONED PISTON TO REVERSE THE PRESSURE CONNECTIONS TO SAID END CHAMBERS OF SAID SECOND CYLINDER, AND THEREBY TO SHIFT SAID DOSING PISTON, AND THE SHIFTING MOVEMENT OF SAID CLOSING PISTON BEING EFFECTIVE TO DISPLACE LIQUID UNDER PRESSURE FROM SAID END CHAMBER INTO SAID SETTING CYLINDER TO EFFECT STEPWISE ROTATION OF SAID SHAFT AND EFFECTING THE PERIODIC SHIFTING OF SAID FIRST PRE-CONTROL SLIDE.