| 摘要 |
A transporting apparatus with directional braking is provided including a frame and a pair of wheel assemblies at least one of which includes a wheel with a plurality of teeth formed therein. Also included is a pawl assembly pivotally coupled with respect to the frame and having a pair of ends for engaging the teeth of the wheel when the pawl assembly is in a first orientation to allow only forward movement of the wheel of the wheel assembly. The pawl further serves to engage the teeth of the wheel when the pawl assembly is in a second orientation to allow only rearward movement of the wheel of the wheel assembly. Finally, the teeth of the wheel are disengaged when the pawl assembly is in an intermediate third orientation to allow both forward and rearward movement of the wheel of the wheel assembly.
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