| 摘要 |
The invention discloses a wheel for a roller skate presenting aligned wheels, comprising a rim (2, 5) having an axial hole (21, 51) within which there are one or two receptacles (22, 23; 52, 53) for ball bearings which receive the supporting pivot (4, 60) for said wheel; one or two rings (26, 27; 56) concentric with said hole, connected with the wall of said hole through radial sections (261, 271; 561); a toroid tread (3, 6) of said rim made of a material suited to the rolling. Said wheel presents between said toroid tread (3, 6) and the outer concentric ring (26, 56) belonging to the rim, a plurality of annular sections (28, 57) having a thin thickness and equally spaced from one another, which are connected to the outer ring, so as to define, on each curved side of said section, an annular space comprised between said annular section and said outer ring which is filled with the material constituting the toroid tread, so as to shape two rings (281, 282; 571, 572) connected with each other by transversal segments (291, 591) formed by the material moulded with the toroid tread into the interval (29, 59) of each annular section (28, 57). <MATH> |
