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Implement carrier having hydrostatic drive

  • US 3,207,244 A
  • Filed: 12/31/1962
  • Issued: 09/21/1965
  • Est. Priority Date: 12/31/1962
  • Status: Expired due to Term
First Claim
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1. IN A SELF-PROPELLED COMBINE OF THE TYPE HAVING AN ENGINE, GROUND ENGAGING WHEELS MOUNTED ON RIMS, HYDRAULIC CONTROLLED IMPLEMENTS;

  • THE IMPROVEMENT COMPRISING A HYDROSTATIC DRIVE INCLUDING A VARIABLE DELIVERY PUMP HAVING A FLUID INPUT SIDE AND A FLUID OUTPUT SIDE DRIVEN BY SAID ENGINE;

    HYDRAULICALLY-POWERED DRIVE UNITS MOUNTED WITHIN SAID WHEEL RIMS AND DRIVINGLY CONNECTED TO SAID GROUND ENGAGING WHEELS;

    A DIRECTION CONTROL VALVE HAVING FLUID INPUT, RETURN AND MOTOR PORTS, SAID DIRECTIONAL CONTROL VALVE HAVING CONDUITS CONNECTING THE FLUID OUTPUT SIDE OF SAID PUMP TO EACH OF SAID HYDRAULIC DRIVE UNITS THROUGH SAID DIRECTIONAL CONTROL VALVE AND CONDUITS FOR RETURNING FLUID FROM EACH OF SAID HYDRAULIC DRIVE UNITS TO SAID DIRECTIONAL CONTROL VALVE, FOR INDIVIDUALLY CONTROLLING THE FLUID FLOW AND ITS DIRECTION TO SAID HYDRAULIC DRIVE UNITS, SAID DIRECTIONAL CONTROL VALVE HAVING A RETURN CONDUIT CONNECTING SAID RETURN PORT TO SAID INPUT SIDE OF SAID VARIABLE DELIVERY PUMP;

    A FLUID TAKE-OFF VALVE, BETWEEN THE RE-

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