| 摘要 |
A trolley includes a front wheel assemblie (12) and a rear wheel assembly bo th assemblies mounted on a trolley frame. The front wheel assembly (12) include s a fixed wheel assembly (24) to aid control of the trolley. In one form the front wheel assembly (12) includes a pair of swivel castors (18) and a fixed wheel assembly (24) disposed between the castors (18). The front wheel assembly (12) is designed so that when the castors (18) swivel from their orientation for forward travel, the fixed wheel assembly (24) is caused to b e lifted off the ground. The trolley also includes a camming device which is operative to lift the front wheel assembly (12) off the ground when the trolley is moved into a nested configuration with a like trolley.
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