| 摘要 |
An adjustable lift, such as a boat lift, or an adjustable apparatus mountable to a boat lift, comprising a frame supporting a keyway, a shaft and a screw along which a hub assembly travels. An axle may extend from the hub assembly and support a wheel, such that translation of the hub assembly along screw raises and lowers the wheel with respect to the frame members of the lift. In this way, the lift may be rolled into place, with its wheels then raised, so that frame members and/or feet of the lift rest on a lake bed or other surface. When wanting to move the lift, a user may rotate the screw in an opposite direction, lowering the wheel with respect to the frame member, freeing lift frame members and feet from the lake bed and allowing the user to roll the lift away.
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