Leveling system for hillside combines

Claim 1

AN AUTOMATIC LEVELING SYSTEM FOR HILLSIDE COMBINES COMPRISIING, HYDRAULIC CYLINDER MEANS OPERATIVELY INTERPOSED BETWEEN THE COMBINE BODY AND ITS ASSOCIATED RUNNING GEAR FOR RIGHTING SAID COMBINE BODY FROM LATERALLY INCLINED POSITIONS; A SOURCE OF HYDRAULIC FLUID PRESSURE; FLUID DISTRIBUTING MEANS CONNECTED IN FLUID RECEIVING RELATION WITH SAID SOURCE AND IN FLUID DELIVERING RELATION WITH SAID CYLINDER MEANS AND INCLUDING SEQUENTIALLY OPERABLE PRIMARY AND SECONDARY VALVE MEANS FOR SUCCESSIVELY INCREASING THE FLOW RATE OF PRESSURE FLUID FROM SAID SOURCE TO SAID CYLINDER MEAND; AND ACTUATING MEANS FOR SAID PRIMARY AND SECONDARY VALVE MEANS INCLUDING A POSITION RESPONSIVE CONTROL DEVICE MOUNTED ON SAID COMBINE BODY FOR TILTING MOVEMENT THEREWITH RELATIVE TO SAID RUNNING GEAR, WHEREBY SAID CYLINDER MEANS WILL BE ENERGIZED BY PRESSURE FLUID DELIVERY THERETO FROM SAID SOURCE AT A PREDETERMINED RATE UPON LATERAL TILTING OF SAID COMBINE BODY THROUGH A PREDETERMINED ANGLE IN EITHER DIRECTION, AND WHEREBY SAID CYLINDER MEANS WILL BE ENERU GIZED BY AN INCREASED RATE OF PRESSURE FLUID DELIVERY THERETO FROM SAID SOURCE UPON LATERAL TILTING OF SAID COMBINE BODY BEYOND SAID PREDETERMINED ANGLE IN EITHER DIRECTION.