Control means in a hydraulic driven helicopter

• US 3,253,806 A
• Filed: 05/20/1964
• Issued: 05/31/1966
• Est. Priority Date: 05/20/1964
• Status: Expired due to Term

• Current Assignee: Karl Eickmann
• Original Assignee: Karl Eickmann
• Inventors: KARL EICKMANN
• Application Number:
  US04/368,820
• Time in Patent Office: 741 Days
• US Class Current: 244/17.23
• CPC Class Codes: B64C 27/12 Rotor drives
• CPC Class Codes: B64C 29/0025 the propellers being fixed relative to the fuselage

Claims

3. A HELICOPTER COMPRISING A BODY, FIRST AND SECOND ROTORS ROTATABLY MOUNTED ON SAID BODY ABOUT SUBSTANTIALLY VERTICAL AXES, FIRST AND SECOND FLUID OPERATED MOTORS DIRECTLY CONNECTED TO RESPECTIVE FIRST AND SECOND ROTORS FOR ROTATING SAID ROTORS AT SPEEDS IN PROPORTION TO THE ROTATION OF SAID FLUID MOTORS, A FLUID DELIVERY CONDUIT CONNECTED TO SAID FIRST MOTOR FOR DELIVERING FLUID TO SAID FIRST MOTOR TO ROTATE SAID FIRST MOTOR AT A SPEED DETERMINED BY THE FLOW OF FLUID DELIVERED THERETO, A FLUID MEDIAL CONDUIT CONNECTED BETWEEN SAID FIRST AND SECOND FLUID MOTORS FOR DELIVERING FLUID DISCHARGED BY SAID FIRST FLUID MOTOR TO SAID SECOND FLUID MOTOR, A FLUID FLOW PRODUCING MEANS CONNECTED BETWEEN SAID FLUID DELIVERY CONDUIT AND SAID SECOND FLUID OPERATED MOTOR FOR SUPPLYING A FLOW OF FLUID TO SAID FLUID DELIVERY CONDUIT, CONTROL MEANS CONNECTED TO SAID DELIVERY CONDUIT FOR VARYING THE FLOW OF FLUID TO SAID FIRST AND SECOND FLUID OPERATED MOTORS, INCLUDING A BYPASS CONDUIT CONNECTED BETWEEN SAID MEDIAL CONDUIT AND SAID FLUID DELIVERY CONDUIT, AND VALE MEANS FOR REGULATING THE FLOW FROM SAID DELIVERY CONDUIT TO SAID FLUID MEDIAL CONDUIT THROUGH SAID BYPASS CONDUIT TO CONTROL THE ATTITUDE OF THE AIRCRAFT.