| 摘要 |
A multi-wheel caster apparatus has a main, surface-contacting wheel, an inline small diameter wheel elevated in front of the main riding wheel, and a third offset mid-sized diameter wheel. The offset wheel is in parallel alignment with and mounted midway between the two inline wheels. The apparatus is mounted to the bottom of a cart, with both stationary and swivel mounting. The offset wheel keeps the wheel housing compact and the elevated wheels maintain a low center of gravity while traveling easily over obstacles.
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