Propeller runner having swivelling blades for turbines

A propeller runner having four swivelling blades radially mounted in a hub, each said blade having at its root spaced, coaxial first and second cylindrical bearing surfaces defining the axis of rotation of said blade about itself, this rotation being intended for governing the angle of incidence of said blade, lateral connecting rods on each blade the movement of which is controlled simultaneously by means internal to said runner so as to regulate jointly the angle of incidence of all of said blades, said first cylindrical bearing surface of each blade being engaged in a bearing formed in the outer portion of said hub, said second cylindrical bearing surface of each blade being engaged around a cylindrical journal, each said journal being rigidly and radially fixed around a central core which in turn is rigidly connected to a portion of said hub extending towards the center, said core carrying two diametrically opposite journals, a shaft passing through said core perpendicularly to the axis of said two journals, said shaft being locked in said core and having two ends which constitute two further journals, each said journal forming an axial thrust bearing for the corresponding blade.