| 摘要 |
A set of adjustable legs for raising and lowering desks and other furniture comprises outer tubular members attachable to the desk or other furniture and inner tubular members slidably and non-rotatably received within the outer members and adapted for vertical movement relative thereto. A threaded shaft having a sprocket on its upper portion is rotatably mounted within the members for moving the inner member relative to the outer member, and a chain interconnects the sprockets of each of the shafts for simultaneous rotational movement to move the inner member along the shaft and thereby raise and lower the desk. The legs may be operated by an electric motor or hand crank connected to the chain.
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