| 摘要 |
A hubless caster assembly includes a caster body and at least one wheel (5), the wheel comprising a toroidal member having a bearing race (16), and a complementary bearing race supported by the caster body. Bearing elements (6) in the races support the wheel in free rotation. The caster body may comprise a ring body (1) having an axial opening, whereby the caster assembly has a large central aperture (11) extending entirely therethrough. A centering ring (8) may be secured in the axial opening with the complementary bearing race formed therein. A hub cap (29) with visual treatment may be secured over the central aperture. |
