| 摘要 |
<p>The invention provides a guide wheel assembly (22) and a trolley (T) equipped with such an assembly (22) to provide for straight line running of the trolley over sloping surfaces. The assembly (22) provides for the instinctive release of the straight running constraint by a user when faced with manoeuvring problems in a confined space. The constraint is automatically reapplied when the trolley (T) is being propelled on a straight line course (F) again.</p> |
