| 摘要 |
PURPOSE: A height adjuster for a ladder support is provided to safely install a ladder on the ground regardless of the ground conditions by adjusting the heights of ladder supports. CONSTITUTION: A height adjuster for a ladder support comprises a ratchet(3), a fixture latch(4), a lever, and a spring. The ratchet is attached to each ladder support(1) of a ladder and independently adjusts the height of the ladder support. The fixture latch fixes the ratchet to the ladder support. The lever controls the fixture latch. The spring applies restriction force to the fixture latch.
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