Invention Grant
US08418314B2 Wheel assembly with a wheel lock structure 失效
轮组件带轮锁结构

Wheel assembly with a wheel lock structure
Abstract:
A wheel assembly includes a base frame having a chamber and a stem in the chamber, a mounting frame for mounting, a wheel pivotally mounted in the base frame, and a wheel lock structure consisting of a holder frame, a lift frame, a crank arm, a control knob and a compression spring and operable to lock/unlock the wheel.
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