| 摘要 |
<p>A ladder (1) comprises first and second legs (2, 3) joined by rungs (5). A first ground engaging element (9) of the first leg (2) is telescopingly slideable within the first leg (2) for adjusting the length of the first leg (2) to accommodate sloping, stepped or uneven ground. A screw drive mechanism (12) operable by a knob (20) through a pair of bevel gears (24, 25) adjusts the position of the first ground engaging element (9) relative to the first leg (2). The length of the second leg (3) may also be adjustable, and lower leg portions of the first and second legs (2, 3) pivotally connected to upper leg portions of the first and second legs (2, 3) so that the lower leg portions are pivoted outwardly from an aligned state to a desired angled state diverging from each other for increasing the ground base of the ladder (1).</p> |
