Patent ID: 8882453

Claim:
A rotor element comprising: an annular surface portion about a rotation axis of the rotor; a fluid passageway arranged through the surface portion; and means for closing the passageway, the means comprising: a closing element that can be deformed depending on rotation speed of the rotor, arranged to regulate fluid flow rate depending on the rotation speed of the rotor, the closing element being of annular shape, and comprising a radially internal radial attachment portion including a plurality of longitudinal attachment holes distributed annularly and each having an axis substantially parallel to the rotation axis, a deformable frustoconical portion extending from the attachment portion, and a radially external free closing portion extending from the frustoconical portion; and an annular shroud with a free edge interacting with the closing element to form the means for closing, the free edge of the annular shroud forming with the closing portion of the closing element a diaphragm closing the fluid passageway.