| 摘要 |
The following specification describes a two-wheeled caster in which the shaft rotatably supporting the caster wheels at opposite ends has a head at each end of smaller diameter than the shaft with a peripheral groove between each head and the adjacent main portion of the shaft to define a shoulder. The shaft engages in a correspondingly sized recess in each caster wheel with each recess terminating in a small diameter recess for receiving the respective shaft head. A thin wall section located between each small diameter caster recess and the adjacent shaft receiving recess is deformed into the groove to rotatably secure the shaft to each caster wheel.
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