Movable vane unit

Claim 1

A MOVABLE VANE UNIT FOR A FLUID FLOW SYSTEM INCLUDING: A VANE HAVING: A BODY SECTION OF GENERAL AIRFOIL SHAPE IN CROSS SECTION. A FIRST GENERALLY CIRCULAR END SECTION AT ONE END OF SAID BODY SECTION, AND A SECOND GENERALLY CIRCULAR END SECTION AT THE OTHER END OF SAID BODY SECTION; A FIRST HOUSING FOR SAID FIRST END SECTION; A FIRST CASING; FIRST SEALING MEANS FOR URGING AT LEAST PART OF SAID FIRST HOUSING AGAINST SAID FIRST CASING TO PREVENT THE LEAKAGE OF PRESSURIZED SYSTEM FLUID THEREBWTWEEN; SECOND SEALING MEANS FOR PREVENTING THE LEAKAGE OF PRESSURIZED SYSTEM FLUID BETWEEN SAID FIRST HOUSING AND SAID FIRST AND SECTION; A JOURNAL ELEMENT EXTENDING FROM SAID FIRST END SECTION; BEARING MEANS ROTATABLY SUPPORTING SAID JOURNAL ELEMENT TO ALLOW ROTATION OF SAID VANE ABOUT A PREDETERMINED AXIS; A FIRST BALL SECTION ON SAID BEARING MEANS TO ALLOW MOVEMENT OF SAID BEARING MEANS AND SAID VANE AT AN ANGLE TO SAID PREDETERMINED AXIS; A SECOND HOUSING FOR SAID SECOND END SECTION; A SECOND CASING; THIRD SEALING MEANS FOR URGING SAID SECOND HOUSING AGAINST SAID SECOND CASING TO PREVENT LEAKAGE OF PRESSURIZED SYSTEM FLUID THEREBETWEEN; FOURTH SEALING MEANS FOR PREVENTING THE LEAKAGE OF PRESSURIZED SYSTEM FLUID BETWEEN SAID SECOND HOUSING AND SAID SECOND END SECTION; A SECOND BALL SECTION CONNECTED TO SAID SECOND END SECTION; A BEARING SURFACE IN SAID SECOND CASING CONFORMING TO AT LEAST PART OF THE SHAPE OF SAID SECOND BALL SECTION, SAID BEARING SURFACE SUPPORTING SAID SECOND BALL SECTION; AND ACTUATING MEANS CONNECTED TO SAID SECOND BALL SECTION FOR ROTATING SAID SECOND BALL SECTION TO ROTATE SAID VANE ABOUT SAID PREDETERMINED AXIS.