| 摘要 |
<p>The invention relates to a fan impeller comprising at least two radial disks with circular contour provided with a plurality of open slots (5) on the outer edge of the disks, each of them suitable for receiving a respective axial blade (3), which is locked by the rolling of the disks, at least one through hole (7), with a shape elongated in the direction of the circumference of the disk, being provided between each pair of consecutive slots (5) of a disk (2), to allow the squashing of the material of the outer edge of the disk following the rolling of the same. <IMAGE></p> |
