| 摘要 |
FIELD: personal use articles.SUBSTANCE: pulley is described, which has a central hub (2); a peripheral rim (3); a first intermediate part (4) comprising a plurality of radial ribs (40) which extend radially from the hub (2), and a second intermediate part (5) comprising a plurality of peripheral ribs (50) which terminate in the said peripheral rim (3), and the intermediate circular rib (6) concentric with the centre of the pulley and having a radius substantially equal to half the radius of the pulley, and the said intermediate circular rib (6) separates the first intermediate part (4) from the second intermediate part, and the said intermediate circular rib (6) comprises the points (40b) of connection of the radial ribs and points (50a) of connection of the peripheral ribs, and the points (40b) of connection of radial ribs are spaced from the points (50a) of connection of the peripheral ribs; and the said peripheral ribs (50) are located with the respective inclination relative to each other and relative to the radial ribs (40) so as to intersect in at least one point (50c, 50d) of intersection to form in the said second intermediate part (5) of a lattice structure.EFFECT: improvement of the design.9 cl, 4 dwg |
